WorldWideScience

Sample records for strong cultural ties

  1. Competition increases in the face of strong regional ties

    International Nuclear Information System (INIS)

    Knoetgen, P.M.

    1987-01-01

    The current fuel market exhibits a large surplus production capacity and is strongly influenced by regional ties, with imports of fabricated fuel serving to supplement domestic production or to keep domestic vendors competitive. In the future, the market is set to become increasingly competitive, especially in Europe and the United States. (author)

  2. Differentiating weak ties and strong ties among external sources of influences for enterprise resource planning (ERP) adoption

    Science.gov (United States)

    Aubert, Benoit; Léger, Pierre-Majorique; Larocque, Denis

    2012-05-01

    Enterprise resource planning (ERP) systems represent a major IT adoption decision. ERP adoption decisions, in the chemicals and allied products sectors, were examined between 1994 and 2005. Networks of strong ties and weak ties partners are investigated. Results show that neighbouring companies linked with strong ties can have an influence on organisations making such adoption decision. Past decisions made by major trading partners have a significant influence on the decision to adopt an ERP system for a given organisation. This reflects the complex nature of the knowledge required for such adoption.

  3. The co-evolution of emotional well-being with weak and strong friendship ties

    OpenAIRE

    Elmer, Timon; Boda, Zsofia; Stadtfeld, Christoph

    2017-01-01

    Social ties are strongly related to well-being. But what characterizes this relationship? This study investigates social mechanisms explaining how social ties affect well-being through social integration and social influence, and how well-being affects social ties through social selection. We hypothesize that highly integrated individuals - those with more extensive and dense friendship networks - report higher emotional well-being than others. Moreover, emotional well-being should be influen...

  4. The rational weakness of strong ties : Failure of group solidarity in a highly cohesive group of rational agents

    NARCIS (Netherlands)

    Flache, A; Yamamoto, H

    2006-01-01

    Recent research (Flache 1996; Flache and Macy 1996) suggests a "weakness of strong ties." Cohesive social networks may undermine group solidarity, rather than sustain it. In the original analysis, simulations showed that adaptive actors learn cooperation in bilateral exchanges faster than

  5. The rational weakness of strong ties : Failure of group solidarity in a highly cohesive group of rational agents

    NARCIS (Netherlands)

    Flache, Andreas

    2002-01-01

    Recent research (Flache, 1996; Flache and Macy, 1996) suggests a "weakness of strong ties." Cohesive social networks may undermine group solidarity, rather than sustain it. In the original analysis, simulations showed that adaptive actors learn cooperation in bilateral exchanges faster than

  6. Does the rise of the Internet bring erosion of strong ties? Analyses of social media use and changes in core discussion networks

    NARCIS (Netherlands)

    Vriens, Eva; van Ingen, Erik

    2017-01-01

    We derive hypotheses from popular accounts of how use of social media affects our strong ties. Several authors have suggested that social media use erodes our strong ties by increasing the volume of social interactions and decreasing their depth. Using two-wave panel data representative of the Dutch

  7. Cultural heritage and memory: untangling the ties that bind

    Directory of Open Access Journals (Sweden)

    Viejo-Rose, Dacia

    2015-12-01

    Full Text Available Today in heritage studies memory looms larger than ever, there are memory parks, memory politics, and memory wars, there is discussion of ‘dissonant’, ‘dark’, and ‘difficult’ heritage linked to memories of traumatic past events. But what to we mean when we use the word ‘memory’ in the field of heritage? How is the divide between its social and individual realms bridged? This article theorizes the intimate relationship between heritage and memory by focusing on three areas. First, it maps out the vocabulary that has emerged from the heritage-memory dyad including how notions of collective memory and lieux de mémoire have been used, and occasionally misused, as well as the metaphors employed in the process. Second, the emergence of memory studies is considered, providing a brief overview of its foundations as well as assessing how it differs from, overlaps with, and contributes to heritage research. A third section offers a brief review of recent developments in cognitive psychology, neuroscience, and evolutionary biology relating to memory and how this might inform heritage studies. The concluding discussion provides a synthesis of the theoretical and empirical contribution of memory research to furthering out understanding of cultural heritage and proposes directions for future work on the area of confluence between the two.La memoria impregna hoy como nunca antes los estudios del patrimonio. Hay parques, políticas y guerras de la memoria. Se habla de un patrimonio “disonante”, “oscuro” o “difícil” vinculado al recuerdo de pasados sucesos traumáticos. Pero, ¿a qué nos referimos cuando usamos la palabra “memoria” en el campo del patrimonio? ¿Cómo se cruza el abismo que separa sus dimensiones social e individual? Este artículo teoriza sobre la íntima relación entre patrimonio y memoria, centrándose en tres áreas. La primera cartografía el vocabulario generado por la díada patrimonio-memoria, incluido

  8. Family ties and health cross-nationally: the contextualizing role of familistic culture and public pension spending in Europe.

    Science.gov (United States)

    Mair, Christine A

    2013-11-01

    Although previous research theorizes that cross-national variation in the relationship between family ties and health is due to nation-level differences in culture and policy/economics, no study has examined this theorization empirically. Using data from the Survey of Health, Ageing, and Retirement in Europe (SHARE) and the Organization for Economic Co-operation and Development (OECD), this study uses multilevel modeling to analyze individual-, nation-, and cross-level effects for 30,291 older adults in 14 nations. Family ties to spouses/partners and parents are associated with better health, but ties to coresident children are associated with poorer health in certain contexts. Familistic culture and public pension spending have a weak but statistically significant moderating effect on the relationship between intergenerational family ties and health. This article underscores the complexity of family and highlights the need for continued theorization and measurement at the nation level to promote older adults' health in diverse contexts.

  9. An Efficient and Robust Hybrid Damper for LCL- or LLCL-Based Grid-Tied Inverter With Strong Grid-Side Harmonic Voltage Effect Rejection

    DEFF Research Database (Denmark)

    Liu, Yuan; Wu, Weimin; He, Yuanbin

    2016-01-01

    A high-order (LCL or LLCL) power filter with a small grid-side inductor is becoming more preferred for a grid-tied inverter due to less total inductance and reduced costs. In a microgrid, the background harmonic voltage (BHV) may distort the injected currents of the grid-tied inverters. In order......-current-feedback AD. Based on this, a single-loop current control with a hybrid damper is proposed for a single-phase LCLor LLCL-filter-based grid-tied inverter. A step-by-step design of the controller method is also introduced in detail. Experiments on a 2-kW prototype fully demonstrate the strong robustness...

  10. Family Ties and Health Cross-Nationally: The Contextualizing Role of Familistic Culture and Public Pension Spending in Europe

    Science.gov (United States)

    2013-01-01

    Objectives. Although previous research theorizes that cross-national variation in the relationship between family ties and health is due to nation-level differences in culture and policy/economics, no study has examined this theorization empirically. Method. Using data from the Survey of Health, Ageing, and Retirement in Europe (SHARE) and the Organization for Economic Co-operation and Development (OECD), this study uses multilevel modeling to analyze individual-, nation-, and cross-level effects for 30,291 older adults in 14 nations. Results. Family ties to spouses/partners and parents are associated with better health, but ties to coresident children are associated with poorer health in certain contexts. Familistic culture and public pension spending have a weak but statistically significant moderating effect on the relationship between intergenerational family ties and health. Discussion. This article underscores the complexity of family and highlights the need for continued theorization and measurement at the nation level to promote older adults’ health in diverse contexts. PMID:24043356

  11. The role of strong-tie social networks in mediating food security of fish resources by a traditional riverine community in the Brazilian Amazon

    Directory of Open Access Journals (Sweden)

    Frédéric Mertens

    2015-09-01

    Full Text Available Social networks are a significant way through which rural communities that manage resources under common property regimes obtain food resources. Previous research on food security and social network analysis has mostly focused on egocentric network data or proxy variables for social networks to explain how social relations contribute to the different dimensions of food security. Whole-network approaches have the potential to contribute to former studies by revealing how individual social ties aggregate into complex structures that create opportunities or constraints to the sharing and distribution of food resources. We used a whole-network approach to investigate the role of network structure in contributing to the four dimensions of food security: food availability, access, utilization, and stability. For a case study of a riparian community from the Brazilian Amazon that is dependent on fish as a key element of food security, we mapped the community strong-tie network among 97% of the village population over 14 years old (n = 336 by integrating reciprocated friendship and occupational ties, as well as close kinship relationships. We explored how different structural properties of the community network contribute to the understanding of (1 the availability of fish as a community resource, (2 community access to fish as a dietary resource, (3 the utilization of fish for consumption in a way that allows the villagers to maximize nutrition while at the same time minimizing toxic risks associated with mercury exposure, and (4 the stability of the fish resources in local ecosystems as a result of cooperative behaviors and community-based management. The contribution of whole-network approaches to the study of the links between community-based natural resource management and food security were discussed in the context of recent social-ecological changes in the Amazonian region.

  12. Networked Identities: Understanding Different Types of Social Organisation and Movements Between Strong and Weak Ties in Networked Environments

    OpenAIRE

    Ryberg, Thomas; Larsen, Malene Charlotte

    2006-01-01

    In this article we take up a critique of the concept of Communities of Practice voiced by several authors, who suggest that network may provide a better metaphor to understand social forms of organisation and learning. This critique we situate within a broader theoretical movement in socio-cultural learning theories. From this we identify some theoretical and analytical challenges to the network metaphor, which we explore and elaborate through an analysis of a Danish social networking site.

  13. Endangerment of cultural heritage sites by strong rain

    Science.gov (United States)

    Krauß, Thomas; Fischer, Peter

    2017-09-01

    Due to climate change extreme weather conditions become more and more frequent in the last years. Especially in Germany nearly every year a large flood event happens. Most of these events are caused by strong rain. There are at most two causes for these floodings: The first is locally strong rain in the area of damage, the second happens at damage sites located near confluxes and strong rain in the upper stream areas of the joining rivers. The amount of damage is often strongly correlated with unreasonable designation of new construction in such endangered regions. Our presented study is based on an earlier project together with a German insurance company. In this project we analyzed correlations of geographical settings with the insurance data of flood damages over ten years. The result of this study was a strong relation of the terrain with the amount and the probability of damages. Further investigations allow us to derive a system for estimating potential endangerment due to strong rain just from suitable digital terrain models (DTMs). In the presented study we apply this method to different types of cultural heritage (CH) sites in Germany and other parts of the world to detect which type of CH sites were build with potential endangerment of strong rain events in mind and which ones are prone to such events.

  14. CULTURE SHOCK EXPERIENCED BY FOREIGN STUDENTS STUDYING AT INDONESIAN UNIVERSI-TIES

    OpenAIRE

    Dwi Poedjiastutie

    2009-01-01

    Abstract: This study was designed to examine the potential culture shock experienced by foreign students in Indonesian university. There were 10 foreign students who responded to the questionnaires sent by the writer through BIPA (Indonesian for foreigners) in international office of foreign students’ universities. It was found that there were three points of academic life that make foreign students experience culture shock, namely: teacher’s roles and attitudes; poorly organized programs...

  15. CULTURE SHOCK EXPERIENCED BY FOREIGN STUDENTS STUDYING AT INDONESIAN UNIVERSI-TIES

    Directory of Open Access Journals (Sweden)

    Dwi Poedjiastutie

    2009-01-01

    Full Text Available Abstract: This study was designed to examine the potential culture shock experienced by foreign students in Indonesian university. There were 10 foreign students who responded to the questionnaires sent by the writer through BIPA (Indonesian for foreigners in international office of foreign students’ universities. It was found that there were three points of academic life that make foreign students experience culture shock, namely: teacher’s roles and attitudes; poorly organized programs; and the local students’ attitudes. In social life, it was found that foreign students experienced culture shock in 3 aspects, namely: women-men relationships; different ways of thinking and different habits.

  16. Complementary actions of melatonin on angiogenic factors, the angiopoietin/Tie2 axis and VEGF, in co‑cultures of human endothelial and breast cancer cells.

    Science.gov (United States)

    González-González, Alicia; González, Alicia; Alonso-González, Carolina; Menéndez-Menéndez, Javier; Martínez-Campa, Carlos; Cos, Samuel

    2018-01-01

    Melatonin exerts oncostatic activity in breast cancer through antiangiogenic actions. There, the aim of the present study was to ascertain whether melatonin modulates, in a coordinated action, angiopoietin-1 (ANG-1), ANG-2, their cognate Tie2 receptor and VEGF in co-cultures of human endothelial cells (HUVECs) and breast cancer (MCF-7) cells. To accomplish this we used co-cultures of human breast cancer cells (MCF-7) or non-malignant human mammary epithelial cells (MCF‑10A) with endothelial cells (HUVECs). The presence of breast cancer cells increased HUVEC proliferation and 1 mM melatonin prevented this effect. ANG-1, ANG-2 and VEGF levels in co-culture media and mRNA expression were upregulated and Tie2 mRNA expression was downregulated in the HUVECs and MCF-7. Melatonin (1 mM) downregulated ANG-1, ANG-2 and VEGF levels in the co-culture media and mRNA expression in both types of cells and upregulated Tie2 mRNA expression in HUVECs. ANG-1, ANG-2, Tie2 and VEGF mRNA expression were not modified during HUVEC/MCF-10A co-culture. Estradiol (10 nM) increased ANG-1, ANG-2 and VEGF mRNA expression in HUVECs and melatonin (1 mM) counteracted this effect. We conclude that melatonin simultaneously coordinates downregulation of angiopoietins with a reduction in VEGF, which could be an effective therapeutic strategy for blocking tumor angiogenesis.

  17. CROSS-CULTURAL AGILITY IN LAW ENFORCEMENT: TYING IN THE INTERLOCUTORS CRAFT

    Science.gov (United States)

    2017-02-10

    effective policing techniques. The Organisation for Economic Co-operation and Development (OECD) provides such data. OECD’s forum assists the governments...Conducting Effective Negotiations : Using the Seven Elements." Webinar. Vantage Partners, LLC. January 22. https://arpa- e.energy.gov/sites/default/files...associations amongst community policing philosophies, cultural competencies, and diplomacy-minded negotiation techniques. Law enforcement’s optimum balance

  18. No creative person is an island : Organisational culture, academic project-based creativity, and the mediating role of intra-organisational social ties

    NARCIS (Netherlands)

    van Kessel, F.G.A.; Oerlemans, L.A.G.; van Stroe-Biezen, S.A.M.

    2014-01-01

    This paper examines the relationship between perceptions of organizational culture, academics’ social embeddedness, and their creative paper project output. It argues that the extent to which researchers working on paper projects are socially embedded by having social ties with colleagues inside and

  19. Developing Expert Teams with a Strong Safety Culture

    Science.gov (United States)

    Rogers, David G.

    2010-01-01

    Would you like to lead a world renowned team that draws out all the talents and expertise of its members and consistently out performs all others in the industry? Ever wonder why so many organizations fail to truly learn from past mistakes only to repeat the same ones at a later date? Are you a program/project manager or team member in a high-risk organization where the decisions made often carry the highest of consequences? Leadership, communication, team building, critical decision-making and continuous team improvement skills and behaviors are mere talking points without the attitudes, commitment and strategies necessary to make them the very fabric of a team. Developing Expert Teams with a Strong Safety Culture, will provide you with proven knowledge and strategies to take your team soaring to heights you may have not thought possible. A myriad of teams have applied these strategies and techniques within their organization team environments: military and commercial aviation, astronaut flight crews, Shuttle flight controllers, members of the Space Shuttle Program Mission Management Team, air traffic controllers, nuclear power control teams, surgical teams, and the fire service report having spectacular success. Many industry leaders are beginning to realize that although the circumstances and environments of these teams may differ greatly to their own, the core elements, governing principles and dynamics involved in managing and building a stellar safety conscious team remain identical.

  20. <strong>Neuroscientific Explanations of Religious Experience are Not free from Cultural Aspectsstrong>

    DEFF Research Database (Denmark)

    Runehov, Anne Leona Cesarine

    2008-01-01

    We cannot disregard that the neuroscientific research on religious phenomena such as religious experiences and rituals for example, has increased significantly the last years. Neuroscientists claim that neuroscience contributes considerably in the process of understanding religious experiences, b...... neuroscientific issues, also cultural-religious assumptions that underlie this conclusion. Key Words Culture, Neuroscience, Religious Experience, Meditation. Udgivelsesdato: January...

  1. Homepage of the <strong>Philosophy Meets Popular Culture Initiativestrong>

    DEFF Research Database (Denmark)

    Grund, Cynthia M.

    2008-01-01

    and students who have a serious interest in the meeting of philosophy with popular culture. The framework language of the site is English, so that the exchange of ideas may include participants from outside Denmark and the Nordic area; one hallmark of much popular culture is its tendency to go global. Swatches...

  2. The “parallel diplomacy” of Mussolini in Brazil: cultural, migratory and political ties in a power project (1922-1943)

    OpenAIRE

    Bertonha, João Fábio

    2012-01-01

    During the interwar period, Italy tried to expand its influence in Latin America and especially in Brazil. Without the military and economic power required for direct action, Italy used "alternative" methods to increase its force in the country. The methods used were the propaganda, mainly cultural, the mobilization of Italian communities in the country and the creation of political ties with the local fascist movement and with the Vargas regime. This paper seeks to understand this effort and...

  3. Building a Strong Culture That Produces Sustainable Performance - 13444

    International Nuclear Information System (INIS)

    McDonald, John A. Jr

    2013-01-01

    Washington River Protection Solutions LLC (WRPS) has been involved with culture improvement for a number of years which has included co-chairing the industry effort to develop the EFCOG safety culture guidance documents [1, 2], and integration of this guidance into organizational processes and behavior expectations, described in more detail below. As various organizational cultural assessments have been periodically performed, and subsequent actions implemented to address improvement opportunities, organizational performance has shown improvement. Culture improvement is evident in the company's industrial safety statistics, event rates, safety culture survey results, employee morale, productivity, leadership effectiveness, and employee engagement. There does appear to be a relationship between striving to demonstrate behaviors consistent with excellent safety culture and good organizational performance over the past couple of years at WRPS. As performance continues to be evaluated, an improvement opportunity was identified to further enhance performance through field oriented behavioral/cultural improvement activities. WRPS recently conducted a three month effort to improve consistent implementation of management expectations by increasing management field presence with a focus on interacting real-time with workers and first line supervisors, and changing behaviors as appropriate. (authors)

  4. No creative person is an island: Organisational culture, academic project-based creativity, and the mediating role of intra-organisational social ties

    Directory of Open Access Journals (Sweden)

    Leon AG Oerlemans

    2014-02-01

    Full Text Available This paper examines the relationship between perceptions of organizational culture, academics’ social embeddedness, and their creative paper project output. It argues that the extent to which researchers working on paper projects are socially embedded by having social ties with colleagues inside and outside their academic department (but within the same university is a causal step linking organizational values and norms to creative outputs. This study, however, does not find support for the proposed mediating effects. Instead, results indicate that three organizational culture dimensions – i.e. performance orientation, environmental orientation, and innovation support – affect employees’ creative project output through their social embeddedness outside the department (but within their own university. As the organizational culture and social embeddedness of employees outside the department are both contextual factors that (either indirectly or directly matter for the generation of creative project outputs by researchers, this study concludes that “no creative person and no project is an island”.

  5. Tongue-Tie (Ankyloglossia)

    Science.gov (United States)

    ... ENTCareers Marketplace Find an ENT Doctor Near You Tongue-tie (Ankyloglossia) Tongue-tie (Ankyloglossia) Patient Health Information ... may be serious in some individuals. When Is Tongue-tie a Problem That Needs Treatment? In Infants ...

  6. Appreciating the ties that bind technical communication to culture: A dynamic model to help us understand differences in discourse structure

    DEFF Research Database (Denmark)

    Kastberg, Peter; Kampf, Constance

    In order to support an explicit understanding of cultural patterns as both dynamic and structured, we will examine Hofstede?s model for stabilization of cultural patterns, and use this model to explore some cultural consequences for patterns of logic and signs that influence the effectiveness of ...

  7. Network ties and survival

    DEFF Research Database (Denmark)

    Acheampong, George; Narteh, Bedman; Rand, John

    2017-01-01

    of the SCPFs in Ghana. Distribution ties are associated with negative survival chances and this is not even reversed if the human capital of the owner increases although managers with higher human capital and higher distribution ties experience positive effects. Industry ties are associated with positive ties...

  8. Supporting aboriginal knowledge and practice in health care: lessons from a qualitative evaluation of the strong women, strong babies, strong culture program.

    Science.gov (United States)

    Lowell, Anne; Kildea, Sue; Liddle, Marlene; Cox, Barbara; Paterson, Barbara

    2015-02-05

    The Strong Women, Strong Babies, Strong Culture Program (the Program) evolved from a recognition of the value of Aboriginal knowledge and practice in promoting maternal and child health (MCH) in remote communities of the Northern Territory (NT) of Australia. Commencing in 1993 it continues to operate today. In 2008, the NT Department of Health commissioned an evaluation to identify enabling factors and barriers to successful implementation of the Program, and to identify potential pathways for future development. In this paper we focus on the evaluation findings related specifically to the role of Aborignal cultural knowledge and practice within the Program. A qualitative evaluation utilised purposive sampling to maximise diversity in program history and Aboriginal culture. Semi-structured, in-depth interviews with 76 participants were recorded in their preferred language with a registered Interpreter when required. Thematic analysis of data was verified or modified through further discussions with participants and members of the evaluation team. Although the importance of Aboriginal knowledge and practice as a fundamental component of the Program is widely acknowledged, there has been considerable variation across time and location in the extent to which these cultural dimensions have been included in practice. Factors contributing to this variation are complex and relate to a number of broad themes including: location of control over Program activities; recognition and respect for Aboriginal knowledge and practice as a legitimate component of health care; working in partnership; communication within and beyond the Program; access to transport and working space; and governance and organisational support. We suggest that inclusion of Aboriginal knowledge and practice as a fundamental component of the Program is key to its survival over more than twenty years despite serious challenges. Respect for the legitimacy of Aboriginal knowledge and practice within health

  9. Discussion of fostering strong nuclear safety culture in nuclear power plants in China

    International Nuclear Information System (INIS)

    Jiang Fuming

    2011-01-01

    This paper described the most recent development of nuclear safety culture in the world nuclear industry. Focus areas are recommended to foster a strong nuclear safety culture (SNSC) in Chinese nuclear industry with the view of our current development, aiming to accelerate the formation of SNSC. (author)

  10. Helicobacter pylori antigen HP0986 (TieA) interacts with cultured gastric epithelial cells and induces IL8 secretion via NF-κB mediated pathway.

    Science.gov (United States)

    Devi, Savita; Ansari, Suhail A; Vadivelu, Jamuna; Mégraud, Francis; Tenguria, Shivendra; Ahmed, Niyaz

    2014-02-01

    The envisaged roles and partly understood functional properties of Helicobacter pylori protein HP0986 are significant in the context of proinflammatory and or proapoptotic activities, the two important facilitators of pathogen survival and persistence. In addition, sequence analysis of this gene predicts a restriction endonuclease function which remained unknown thus far. To evaluate the role of HP0986 in gastric inflammation, we studied its expression profile using a large number of clinical isolates but a limited number of biopsies and patient sera. Also, we studied antigenic role of HP0986 in altering cytokine responses of human gastric epithelial (AGS) cells including its interaction with and localization within the AGS cells. For in vitro expression study of HP0986, 110 H. pylori clinical isolates were cultured from patients with functional dyspepsia. For expression analysis by qRT PCR of HP0986, 10 gastric biopsy specimens were studied. HP0986 was also used to detect antibodies in patient sera. AGS cells were incubated with recombinant HP0986 to determine cytokine response and NF-κB activation. Transient transfection with HP0986 cloned in pEGFPN1 was used to study its subcellular localization or homing in AGS cells. Out of 110 cultured H. pylori strains, 34 (31%) were positive for HP0986 and this observation was correlated with in vitro expression profiles. HP0986 mRNA was detected in 7 of the 10 biopsy specimens. Further, HP0986 induced IL-8 secretion in gastric epithelial cells in a dose and time-dependent manner via NF-κB pathway. Serum antibodies against HP0986 were positively associated with H. pylori positive patients. Transient transfection of AGS cells revealed both cytoplasmic and nuclear localization of HP0986. HP0986 was moderately prevalent in clinical isolates and its expression profile in cultures and gastric biopsies points to its being naturally expressed. Collective observations including the induction of IL-8 via TNFR1 and NF

  11. Tie rod insertion test

    CERN Multimedia

    B. LEVESY

    2002-01-01

    The superconducting coil is inserted in the outer vaccum tank and supported by a set of tie rods. These tie rods are made of titanium alloy. This test reproduce the final insertion of the tie rods inside the outer vacuum tank.

  12. Oxygen availability strongly affects chronological lifespan and thermotolerance in batch cultures of Saccharomyces cerevisiae

    Science.gov (United States)

    Bisschops, Markus M.; Vos, Tim; Martínez-Moreno, Rubén; Cortés, Pilar T.; Pronk, Jack T.; Daran-Lapujade, Pascale

    2015-01-01

    Stationary-phase (SP) batch cultures of Saccharomyces cerevisiae, in which growth has been arrested by carbon-source depletion, are widely applied to study chronological lifespan, quiescence and SP-associated robustness. Based on this type of experiments, typically performed under aerobic conditions, several roles of oxygen in aging have been proposed. However, SP in anaerobic yeast cultures has not been investigated in detail. Here, we use the unique capability of S. cerevisiae to grow in the complete absence of oxygen to directly compare SP in aerobic and anaerobic bioreactor cultures. This comparison revealed strong positive effects of oxygen availability on adenylate energy charge, longevity and thermotolerance during SP. A low thermotolerance of anaerobic batch cultures was already evident during the exponential growth phase and, in contrast to the situation in aerobic cultures, was not substantially increased during transition into SP. A combination of physiological and transcriptome analysis showed that the slow post-diauxic growth phase on ethanol, which precedes SP in aerobic, but not in anaerobic cultures, endowed cells with the time and resources needed for inducing longevity and thermotolerance. When combined with literature data on acquisition of longevity and thermotolerance in retentostat cultures, the present study indicates that the fast transition from glucose excess to SP in anaerobic cultures precludes acquisition of longevity and thermotolerance. Moreover, this study demonstrates the importance of a preceding, calorie-restricted conditioning phase in the acquisition of longevity and stress tolerance in SP yeast cultures, irrespective of oxygen availability. PMID:28357268

  13. Oxygen availability strongly affects chronological lifespan and thermotolerance in batch cultures of Saccharomyces cerevisiae

    Directory of Open Access Journals (Sweden)

    Markus M.M. Bisschops

    2015-10-01

    Full Text Available Stationary-phase (SP batch cultures of Saccharomyces cerevisiae, in which growth has been arrested by carbon-source depletion, are widely applied to study chronological lifespan, quiescence and SP-associated robustness. Based on this type of experiments, typically performed under aerobic conditions, several roles of oxygen in aging have been proposed. However, SP in anaerobic yeast cultures has not been investigated in detail. Here, we use the unique capability of S. cerevisiae to grow in the complete absence of oxygen to directly compare SP in aerobic and anaerobic bioreactor cultures. This comparison revealed strong positive effects of oxygen availability on adenylate energy charge, longevity and thermotolerance during SP. A low thermotolerance of anaerobic batch cultures was already evident during the exponential growth phase and, in contrast to the situation in aerobic cultures, was not substantially increased during transition into SP. A combination of physiological and transcriptome analysis showed that the slow post-diauxic growth phase on ethanol, which precedes SP in aerobic, but not in anaerobic cultures, endowed cells with the time and resources needed for inducing longevity and thermotolerance. When combined with literature data on acquisition of longevity and thermotolerance in retentostat cultures, the present study indicates that the fast transition from glucose excess to SP in anaerobic cultures precludes acquisition of longevity and thermotolerance. Moreover, this study demonstrates the importance of a preceding, calorie-restricted conditioning phase in the acquisition of longevity and stress tolerance in SP yeast cultures, irrespective of oxygen availability.

  14. Senior Managers’ Network Tie Use

    DEFF Research Database (Denmark)

    Zarzecka, Olga; Villeseche, Florence

    While the importance or even necessity to build and maintain resourceful social networks appears as a forthright fact, there is still a lack of certainty as to who benefits from the resources that can be accessed through senior managers’ networks, and under what conditions. In this paper, we...... contribute to answering this puzzle with a sample constituted of senior managers from Denmark and their network ties, and investigate both economic and sociological conditions of senior managers’ tie use. Our results show that the greater the distance between aspiration level and actual firm performance......, the more likely it is that senior managers will use their network ties to access resources that benefit chiefly the individual rather than the organization. In addition, we demonstrate that this rapport is moderated by senior managers’ social identity as a member of the corporate elite, so that a strong...

  15. More ties than we thought

    Directory of Open Access Journals (Sweden)

    Dan Hirsch

    2015-05-01

    Full Text Available We extend the existing enumeration of neck tie-knots to include tie-knots with a textured front, tied with the narrow end of a tie. These tie-knots have gained popularity in recent years, based on reconstructions of a costume detail from The Matrix Reloaded, and are explicitly ruled out in the enumeration by Fink & Mao (2000. We show that the relaxed tie-knot description language that comprehensively describes these extended tie-knot classes is context free. It has a regular sub-language that covers all the knots that originally inspired the work. From the full language, we enumerate 266,682 distinct tie-knots that seem tie-able with a normal neck-tie. Out of these 266,682, we also enumerate 24,882 tie-knots that belong to the regular sub-language.

  16. Mobile devices and weak ties: a study of vision impairments and workplace access in Bangalore.

    Science.gov (United States)

    Pal, Joyojeet; Lakshmanan, Meera

    2015-07-01

    To explore ways in which social and economic interactions are changed by access to mobile telephony. This is a mixed-methods study of mobile phone use among 52 urban professionals with vision impairments in Bangalore, India. Interviews and survey results indicated that mobile devices, specifically those with adaptive technology software, play a vital role as multi-purpose devices that enable people with disabilities to navigate economically and socially in an environment where accessibility remains a significant challenge. We found that mobile devices play a central role in enabling and sustaining weak ties, but also that these weak ties have important gender-specific implications. We found that women have less access to weak ties than men, which impacts women's access to assistive technology (AT). This has potential implications for women's sense of safety and independence, both of which are strongly related to AT access. Implications for Rehabilitation Adaptive technologies increase individuals' ability to keep in contact with casual connections or weak ties through phone calls or social media. Men tend to have stronger access to weak ties than women in India due to cultural impediments to independent access to public spaces. Weak ties are an important source of assistive technology (AT) due to the high rate of resale of used AT, typically through informal networks.

  17. The Strength of Direct Ties

    DEFF Research Database (Denmark)

    Claussen, Jörg; Falck, Oliver; Grosjean, Thorsten

    2012-01-01

    We analyze the economic effects of a developer's connectedness in the electronic game industry. Knowledge spillovers between developers are likely to be of special relevance in this knowledge-intensive and regionally concentrated industry. We calculate social network measures for a developer......'s connectedness to other developers at multiple points in time. In a regression in which we exploit within-career variation in social network measures, we find that the number of direct ties a developer has to other developers has a strong effect on both a game's revenues and critics' scores. The quality...

  18. In Vitro Fertilization and Embryo Culture Strongly Impact the Placental Transcriptome in the Mouse Model

    Science.gov (United States)

    Fauque, Patricia; Mondon, Françoise; Letourneur, Franck; Ripoche, Marie-Anne; Journot, Laurent; Barbaux, Sandrine; Dandolo, Luisa; Patrat, Catherine; Wolf, Jean-Philippe; Jouannet, Pierre; Jammes, Hélène; Vaiman, Daniel

    2010-01-01

    Background Assisted Reproductive Technologies (ART) are increasingly used in humans; however, their impact is now questioned. At blastocyst stage, the trophectoderm is directly in contact with an artificial medium environment, which can impact placental development. This study was designed to carry out an in-depth analysis of the placental transcriptome after ART in mice. Methodology/Principal Findings Blastocysts were transferred either (1) after in vivo fertilization and development (control group) or (2) after in vitro fertilization and embryo culture. Placentas were then analyzed at E10.5. Six percent of transcripts were altered at the two-fold threshold in placentas of manipulated embryos, 2/3 of transcripts being down-regulated. Strikingly, the X-chromosome harbors 11% of altered genes, 2/3 being induced. Imprinted genes were modified similarly to the X. Promoter composition analysis indicates that FOXA transcription factors may be involved in the transcriptional deregulations. Conclusions For the first time, our study shows that in vitro fertilization associated with embryo culture strongly modify the placental expression profile, long after embryo manipulations, meaning that the stress of artificial environment is memorized after implantation. Expression of X and imprinted genes is also greatly modulated probably to adapt to adverse conditions. Our results highlight the importance of studying human placentas from ART. PMID:20169163

  19. In vitro fertilization and embryo culture strongly impact the placental transcriptome in the mouse model.

    Directory of Open Access Journals (Sweden)

    Patricia Fauque

    Full Text Available BACKGROUND: Assisted Reproductive Technologies (ART are increasingly used in humans; however, their impact is now questioned. At blastocyst stage, the trophectoderm is directly in contact with an artificial medium environment, which can impact placental development. This study was designed to carry out an in-depth analysis of the placental transcriptome after ART in mice. METHODOLOGY/PRINCIPAL FINDINGS: Blastocysts were transferred either (1 after in vivo fertilization and development (control group or (2 after in vitro fertilization and embryo culture. Placentas were then analyzed at E10.5. Six percent of transcripts were altered at the two-fold threshold in placentas of manipulated embryos, 2/3 of transcripts being down-regulated. Strikingly, the X-chromosome harbors 11% of altered genes, 2/3 being induced. Imprinted genes were modified similarly to the X. Promoter composition analysis indicates that FOXA transcription factors may be involved in the transcriptional deregulations. CONCLUSIONS: For the first time, our study shows that in vitro fertilization associated with embryo culture strongly modify the placental expression profile, long after embryo manipulations, meaning that the stress of artificial environment is memorized after implantation. Expression of X and imprinted genes is also greatly modulated probably to adapt to adverse conditions. Our results highlight the importance of studying human placentas from ART.

  20. Characterizing the Google Books Corpus: Strong Limits to Inferences of Socio-Cultural and Linguistic Evolution.

    Directory of Open Access Journals (Sweden)

    Eitan Adam Pechenick

    Full Text Available It is tempting to treat frequency trends from the Google Books data sets as indicators of the "true" popularity of various words and phrases. Doing so allows us to draw quantitatively strong conclusions about the evolution of cultural perception of a given topic, such as time or gender. However, the Google Books corpus suffers from a number of limitations which make it an obscure mask of cultural popularity. A primary issue is that the corpus is in effect a library, containing one of each book. A single, prolific author is thereby able to noticeably insert new phrases into the Google Books lexicon, whether the author is widely read or not. With this understood, the Google Books corpus remains an important data set to be considered more lexicon-like than text-like. Here, we show that a distinct problematic feature arises from the inclusion of scientific texts, which have become an increasingly substantive portion of the corpus throughout the 1900 s. The result is a surge of phrases typical to academic articles but less common in general, such as references to time in the form of citations. We use information theoretic methods to highlight these dynamics by examining and comparing major contributions via a divergence measure of English data sets between decades in the period 1800-2000. We find that only the English Fiction data set from the second version of the corpus is not heavily affected by professional texts. Overall, our findings call into question the vast majority of existing claims drawn from the Google Books corpus, and point to the need to fully characterize the dynamics of the corpus before using these data sets to draw broad conclusions about cultural and linguistic evolution.

  1. Characterizing the Google Books Corpus: Strong Limits to Inferences of Socio-Cultural and Linguistic Evolution.

    Science.gov (United States)

    Pechenick, Eitan Adam; Danforth, Christopher M; Dodds, Peter Sheridan

    2015-01-01

    It is tempting to treat frequency trends from the Google Books data sets as indicators of the "true" popularity of various words and phrases. Doing so allows us to draw quantitatively strong conclusions about the evolution of cultural perception of a given topic, such as time or gender. However, the Google Books corpus suffers from a number of limitations which make it an obscure mask of cultural popularity. A primary issue is that the corpus is in effect a library, containing one of each book. A single, prolific author is thereby able to noticeably insert new phrases into the Google Books lexicon, whether the author is widely read or not. With this understood, the Google Books corpus remains an important data set to be considered more lexicon-like than text-like. Here, we show that a distinct problematic feature arises from the inclusion of scientific texts, which have become an increasingly substantive portion of the corpus throughout the 1900 s. The result is a surge of phrases typical to academic articles but less common in general, such as references to time in the form of citations. We use information theoretic methods to highlight these dynamics by examining and comparing major contributions via a divergence measure of English data sets between decades in the period 1800-2000. We find that only the English Fiction data set from the second version of the corpus is not heavily affected by professional texts. Overall, our findings call into question the vast majority of existing claims drawn from the Google Books corpus, and point to the need to fully characterize the dynamics of the corpus before using these data sets to draw broad conclusions about cultural and linguistic evolution.

  2. Inferring tie strength from online directed behavior.

    Directory of Open Access Journals (Sweden)

    Jason J Jones

    Full Text Available Some social connections are stronger than others. People have not only friends, but also best friends. Social scientists have long recognized this characteristic of social connections and researchers frequently use the term tie strength to refer to this concept. We used online interaction data (specifically, Facebook interactions to successfully identify real-world strong ties. Ground truth was established by asking users themselves to name their closest friends in real life. We found the frequency of online interaction was diagnostic of strong ties, and interaction frequency was much more useful diagnostically than were attributes of the user or the user's friends. More private communications (messages were not necessarily more informative than public communications (comments, wall posts, and other interactions.

  3. All tied up: Tied staying and tied migration within the United States, 1997 to 2007

    Directory of Open Access Journals (Sweden)

    Thomas J. Cooke

    2013-10-01

    Full Text Available Background: The family migration literature presumes that women are cast into the role of the tied migrant. However, clearly identifying tied migrants is a difficult empirical task since it requires the identification of a counterfactual: Who moved but did not want to? Objective: This research develops a unique methodology to directly identify both tied migrants and tied stayers in order to investigate their frequency and determinants. Methods: Using data from the 1997 through 2009 U.S. Panel Study of Income Dynamics (PSID, propensity score matching is used to match married individuals with comparable single individuals to create counterfactual migration behaviors: who moved but would not have moved had they been single (tied migrants and who did not move but would have moved had they been single (tied stayers. Results: Tied migration is relatively rare and not limited just to women: rates of tied migration are similar for men and women. However, tied staying is both more common than tied migration and equally experienced by men and women. Consistent with the body of empirical evidence, an analysis of the determinants of tied migration and tied staying demonstrates that family migration decisions are imbued with gender. Conclusions: Additional research is warranted to validate the unique methodology developed in this paper and to confirm its results. One line of future research should be to examine the effects of tied staying, along with tied migration, on well-being, union stability, employment, and earnings.

  4. Networking by entrepreneurs: patterns of tie formation for emerging organizations

    NARCIS (Netherlands)

    Elfring, T.; Hulsink, W.

    2007-01-01

    There are two conflicting patterns of network development of founding entrepreneurs that emerge from existing literature. One of them evolves from an identity-based network dominated by strong ties into an intentionally managed network rich in weak ties. The other involves the opposite, with weak

  5. Relevant ties matter

    DEFF Research Database (Denmark)

    Larsen, Christian Albrekt; Pedersen, Jacob; Mouw, Ted

    What is the effect of social networks on labor market outcomes? The tradition following Grannovetter claims that social ties have a positive effect on wages, job prestige and job satisfaction. Although a number of studies have found positive correlations between friendship characteristics...... to find work. Results indicate that the number of industry-specific colleagues is both associated higher employment rates with the probability of using contacts to find work. We argue that this is consistent with a causal role of social networks in the labor market, as former colleagues provide...... information about job openings....

  6. Redes sociais em comunidades de baixa renda: os efeitos diferenciais dos laços fracos e dos laços fortes Social networks in low-income communities: the differential effects of weak and strong ties

    Directory of Open Access Journals (Sweden)

    Antônio Augusto Pereira Prates

    2009-10-01

    Full Text Available Neste artigo demonstramos, a partir de uma replicação qualitativa de um estudo quantitativo, que os sistemas fechados de interação - aqui denominados capital social - e os abertos - laços fracos - são fenômenos de natureza distinta e, consequentemente, desempenham funções distintas na determinação da capacidade de articulação coletiva de indivíduos e no grau de eficácia de ações coletivas. A hipótese principal do artigo é que, enquanto capital social tem a ver com maior capacidade dos membros da comunidade para articular mobilização social, os laços fracos dizem respeito à capacidade de a comunidade conseguir benefícios, como saneamento básico, segurança pública, transporte coletivo, saúde e lazer - aqui denominada eficácia coletiva. A metodologia adotada baseia-se na replicação qualitativa de um survey, com três estudos de caso em comunidades periféricas da Região Metropolitana de Belo Horizonte, sobre a importância dos laços fracos para a ação eficaz da comunidade diante do poder público.This article demonstrates, through a qualitative replication of a quantitative research - a survey - that the concepts of closed interaction systems - social capital - and open ones - weak ties - refer to different kinds of social phenomena and, therefore, have independent roles in determining the individuals' capability of collective articulation as well as the effectiveness of the collective actions. The main hypothesis is that while social capital has to do with the people's ability to articulate social mobilization, weak ties have to do with the community's capability to obtain services such as sanitation, public safety, transportation, health care and leisure facilities - here called collective effectiveness. The study comprised a qualitative replication of a survey, with three case studies of low-income communities in the Belo Horizonte metropolitan area.

  7. Promotion and Support of Strong Safety Culture at the Hungarian Regulatory Body

    International Nuclear Information System (INIS)

    Bódis, Z.

    2016-01-01

    The Hungarian Atomic Energy Authority (HAEA) in 2014 carried out a self-assessment in order to preparation for IAEA IRRS mission. As a result of the SWOT analysis it was concluded that for the promotion, development and improvement of safety culture at the HAEA is displayed only on the policy level. In order to obtain a greater emphasis on safety culture within the organization a working group was created. The task of the working group was to define the proposed actions to develop the organizational safety culture. The working group reviewed the current situation, the international experiences and proposed on this basis the elaboration of a guideline regarding to organizational safety culture, to integrate this guideline into the organizational training program so as to apply to all levels of the organization and presentation of the safety culture as part of the training of new comers. Results so far: The working group has defined the main tasks and the connecting milestones in order to develop and improve the organizational safety culture at the HAEA. HAEA has elaborated a guideline for performing safety culture self-assessment based on IAEA and other relevant documents.

  8. Strength matters: Tie strength as a causal driver of networks' information benefits.

    Science.gov (United States)

    Kim, Minjae; Fernandez, Roberto M

    2017-07-01

    Studies of social networks have often taken the existence of a social tie as a proxy for the transmission of information. However, other studies of social networks in the labor market propose that the likelihood of information transmission might depend on strength of the tie; and that tie strength is a potentially important source of the tie's value. After all, even if job seekers have social ties to those who have valuable job information, the seekers will gain little information benefit when the ties do not actually transmit the information. This paper clarifies the conditions under which social ties might provide information benefits. We use a survey vignette experiment and ask MBA students about their likelihood of relaying job information via strong ties (to friends) or weak ties (to acquaintances), holding constant the structural locations spanned by the tie and job seekers' fit with the job. The results support the claim that strength of tie has a causal effect on the chances of information transmission: potential referrers are more likely to relay job information to their friends than to acquaintances. The larger implication of these findings is that whatever benefits there might be to using weak ties to reach distant non-redundant information during job search, these benefits need to be considered against the likely fact that people connected via weak ties are less likely to actually share information about job opportunities than are people to whom the job seeker is strongly tied. Copyright © 2016 Elsevier Inc. All rights reserved.

  9. Organisational benefits of a strong research culture in a health service: a systematic review.

    Science.gov (United States)

    Harding, Katherine; Lynch, Lauren; Porter, Judi; Taylor, Nicholas F

    2017-03-01

    Objective The aim of the present study was to determine whether there is an association between having research culture in a health service and better organisational performance. Methods Using systematic review methods, databases were searched, inclusion criteria applied and study quality appraised. Data were extracted from selected studies and the results were synthesised descriptively. Results Eight studies were selected for review. Five studies compared health services with high versus low levels of research activity among the workforce. Three studies evaluated the effect of specific interventions focused on the health workforce. All studies reported a positive association between research activity and organisational performance. Improved organisational performance included lower patient mortality rates (two of two studies), higher levels of patient satisfaction (one of one study), reduced staff turnover (two of two studies), improved staff satisfaction (one of two studies) and improved organisational efficiency (four of five studies). Conclusions A stronger research culture appears to be associated with benefits to patients, staff and the organisation. What is known about this topic? Research investment in the health workforce can increase research productivity of the health workforce. In addition, investment in clinical research can lead to positive health outcomes. However, it is not known whether a positive research culture among the health workforce is associated with improved organisational performance. What does this paper add? The present systematic review of the literature provides evidence that a positive research culture and interventions directed at the health workforce are associated with patient, staff and organisational benefits. What are the implications for practitioners? For health service managers and policy makers, one interpretation of the results could be to provide support for initiatives directed at the health workforce to increase a

  10. New Tech, New Ties:

    DEFF Research Database (Denmark)

    Ling, Richard

    —those mediated by mobile communication and those that are face to face. Ling finds that through the use of various social rituals the mobile telephone strengthens social ties within the circle of friends and family—sometimes at the expense of interaction with those who are physically present—and creates what he...... bonding. From this perspective, he examines how mobile communication affects face-to-face ritual situations and how ritual is used in interaction mediated by mobile communication. He looks at the evidence, including interviews and observations from around the world, that documents the effect of mobile......The message of this book is simple: the mobile phone strengthens social bonds among family and friends. With a traditional land-line telephone, we place calls to a location and ask hopefully if someone is "there"; with a mobile phone, we have instant and perpetual access to friends and family...

  11. Interaction forming moral and strong will qualities of college students during physical culture with patriotic.

    Directory of Open Access Journals (Sweden)

    Kraynyuk O.P.

    2011-06-01

    Full Text Available It shows the cooperation at education of youth in the spirit of patriotism during the physical training lessons in college. It 102 technical college students of first course take a part in experiment, who will be a soldier. It's formed, that patriotic education of youth is conditioned by educational influence of physical culture means. But traditions of sport and patriotic work nowadays take a very different complexion and modern forms.

  12. Ties that Blind: Perpetuation of Racial Comfort and Discomfort at a Community College

    Science.gov (United States)

    Price, Douglas B.; Hyle, Adrienne E.; Jordan, Kitty V.

    2009-01-01

    Interviews with 17 African American students and 19 White students were employed to examine interracial relations at a predominantly White community college campus. Seen through the lens of Granovetter's strength of ties theory, the interview findings revealed that strong intraracial ties and the absence of weak interracial ties inhibited…

  13. Reduced ratings of physical and relational aggression for youths with a strong cultural identity: evidence from the Naskapi people.

    Science.gov (United States)

    Flanagan, Tara; Iarocci, Grace; D'Arrisso, Alexandra; Mandour, Tarek; Tootoosis, Curtis; Robinson, Sandy; Burack, Jacob A

    2011-08-01

    Minority youth in general, and Aboriginal youth in particular, are at increased statistical risk for being perpetrators or victims of aggression. We examined the potential protective aspect of cultural identity in relation to peer ratings of physical and relational aggression and factors typically associated with each among almost the entire cohort of Naskapi youths from Kawawachikamach, Québec. Hierarchical multiple regressions revealed that a strong identity with their own Native culture predicted less perceived physical and social aggression by their peers. These findings are discussed in the context of the role of a positive affiliation with ancestral culture for the diminishment of adolescent aggression and for general adaptive development and well-being. Copyright © 2011 Society for Adolescent Health and Medicine. Published by Elsevier Inc. All rights reserved.

  14. Why do leaf-tying caterpillars abandon their leaf ties?

    Directory of Open Access Journals (Sweden)

    Michelle Sliwinski

    2013-09-01

    Full Text Available Leaf-tying caterpillars act as ecosystem engineers by building shelters between overlapping leaves, which are inhabited by other arthropods. Leaf-tiers have been observed to leave their ties and create new shelters (and thus additional microhabitats, but the ecological factors affecting shelter fidelity are poorly known. For this study, we explored the effects of resource limitation and occupant density on shelter fidelity and assessed the consequences of shelter abandonment. We first quantified the area of leaf material required for a caterpillar to fully develop for two of the most common leaf-tiers that feed on white oak, Quercus alba. On average, Psilocorsis spp. caterpillars consumed 21.65 ± 0.67 cm2 leaf material to complete development. We also measured the area of natural leaf ties found in a Maryland forest, to determine the distribution of resources available to caterpillars in situ. Of 158 natural leaf ties examined, 47% were too small to sustain an average Psilocorsis spp. caterpillar for the entirety of its development. We also manipulated caterpillar densities within experimental ties on potted trees to determine the effects of cohabitants on the likelihood of a caterpillar to leave its tie. We placed 1, 2, or 4 caterpillars in ties of a standard size and monitored the caterpillars twice daily to track their movement. In ties with more than one occupant, caterpillars showed a significantly greater propensity to leave their tie, and left sooner and at a faster rate than those in ties as single occupants. To understand the consequences of leaf tie abandonment, we observed caterpillars searching a tree for a site to build a shelter in the field. This is a risky behavior, as 17% of the caterpillars observed died while searching for a shelter site. Caterpillars that successfully built a shelter traveled 110 ± 20 cm and took 28 ± 7 min to find a suitable site to build a shelter. In conclusion, leaf-tying caterpillars must frequently

  15. Thymic epithelial cells. I. Expression of strong suppressive (veto) activity in mouse thymic epithelial cell cultures

    DEFF Research Database (Denmark)

    Claesson, Mogens Helweg; Ropke, C

    1990-01-01

    We show that thymic epithelial cells grown under serum-free conditions in a chemically defined culture medium can act as veto cells in vitro. The veto activity of thymic epithelial cells results in inactivation of specific alloreactive cytotoxic T-cell precursors at the clonal level. It is conclu....... It is concluded that the epithelial stromal cells of the thymus, by acting as veto cells, may be responsible for the negative intrathymic selection of self-reactive thymocytes leading to elimination of the vast majority of immature thymic lymphocytes....

  16. Family Ties and Civic Virtues

    DEFF Research Database (Denmark)

    Ljunge, Jan Martin

    I establish a positive relationship between family ties and civic virtues, as captured by disapproval of tax and benefit cheating, corruption, and a range of other dimensions of exploiting others for personal gain. I find that family ties are a complement to social capital, using within country...

  17. Teacher, Industry and Environment (TIE).

    Science.gov (United States)

    Holmes, Neal J.; Powers, Michael H.

    A description of the Teacher, Industry and Environment (TIE) educational improvement project at Central Missouri State Univesity is provided in this report. TIE is designed for Missouri high school chemistry teachers, involving 73 of them in a weekend workshop, meeting with chemists, engineers, and educators to assist them in using resources…

  18. Local environmental pollution strongly influences culturable bacterial aerosols at an urban aquatic superfund site.

    Science.gov (United States)

    Dueker, M Elias; O'Mullan, Gregory D; Juhl, Andrew R; Weathers, Kathleen C; Uriarte, Maria

    2012-10-16

    In polluted environments, when microbial aerosols originate locally, species composition of the aerosols should reflect the polluted source. To test the connection between local environmental pollution and microbial aerosols near an urban waterfront, we characterized bacterial aerosols at Newtown Creek (NTC), a public waterway and Superfund site in a densely populated area of New York, NY, USA. Culturable bacterial aerosol fallout rate and surface water bacterial concentrations were at least an order of magnitude greater at NTC than at a neighboring, less polluted waterfront and a nonurban coastal site in Maine. The NTC culturable bacterial aerosol community was significantly different in taxonomic structure from previous urban and coastal aerosol studies, particularly in relative abundances of Actinobacteria and Proteobacteria. Twenty-four percent of the operational taxonomic units in the NTC overall (air + water) bacterial isolate library were most similar to bacterial 16S rRNA gene sequences previously described in terrestrial or aquatic environments contaminated with sewage, hydrocarbons, heavy metals, and other industrial waste. This study is the first to examine the community composition and local deposition of bacterial aerosols from an aquatic Superfund site. The findings have important implications for the use of aeration remediation in polluted aquatic environments and suggest a novel pathway of microbial exposure in densely populated urban communities containing contaminated soil and water.

  19. A "reverence for strong drink": the lost generation and the elevation of alcohol in American culture.

    Science.gov (United States)

    Room, R

    1984-11-01

    Over one-half of famous American authors with reputations for drunkenness were born between 1888 and 1900. Although college students of their generation seem to have been "drier" than earlier or later cohorts, many of the writers were already drinking heavily in college. Several reasons are suggested. After World War I, many fledgling authors spent time in Paris, becoming known as the "lost generation" and adding French and other drinking styles to their existing drinking patterns. Bohemian Americans during Prohibition found a resonance with the residual political symbolism of drinking in France as a statement of autonomy against the state. The community of expatriate writers provided a supportive environment for heavy drinking. In turn, the lost generation became a transmitter of new values concerning drinking to American culture in general. Their writings inadvertently promoted mass middle-class tourism to Paris in the late 1920s. Their lives and works strengthened the association between writing and drinking as a model for later literary generations. Both in written form and as films, their works conveyed an attractive image of drinking and often of drunkenness to the wider public. The decisive shift in drinking patterns among middle-class youth in the late 1920s ushered in a lasting change in the cultural position of drinking, as it became a cosmopolitan, progressive and eventually respectable behavior. At a minimum, the writers of the lost generation served as harbingers, carriers and catalysts of this change.

  20. Tie Content in Professional Networks

    DEFF Research Database (Denmark)

    Zarzecka, Olga

    resources that senior managers acquire through their network ties, i.e. the tie content, remain heavily understudied. Hence, the purpose of this dissertation is to answer the following question: What resources flow through informal ties in senior managers’ professional networks, and why? The first chapter...... introduces the topic of this dissertation as well as the overall research question. The three next chapters are empirical studies of informal ties in professional networks of Danish senior managers, that together attempt to answer the overall research question. Chapter 2 looks into gender differences...... dynamics and studies the effect of friendship on the extent and novelty of professional advice a tie provides. The fifth and final chapter of this dissertation summarizes the findings of the research papers in the light of the overall research question. Essentially, this dissertation suggests...

  1. The social tie and the malaise facing the helplessness

    Directory of Open Access Journals (Sweden)

    Cristina Aparecida Tannure Cavalcanti

    2015-12-01

    Full Text Available In this article we intend to approach the discourses as social ties, indicated by Lacan, relating them to the freudian concepts of helplessness (Hilflosigkeit and the malaise of civilization. The theory of discourses opens up a new way of thinking about clinical structures and social ties, by articulating language and enjoyment camps, the subject and the unconscious knowledge. This theory, while it takes over Freudian principles, it advances in impasses left by the Viennese master, in particular on the relationship between the metapsychological foundations of the subjective constitution and the conceptual bases concerning culture and actual social ties.

  2. Social network ties beyond nonredundancy: an experimental investigation of the effect of knowledge content and tie strength on creativity.

    Science.gov (United States)

    Perry-Smith, Jill E

    2014-09-01

    Social network research emphasizes the access to nonredundant knowledge content that network ties provide. I suggest that some content is more beneficial than others and that tie strength may affect creativity for reasons other than the associated structure. That is, tie strength may affect how individuals process nonredundant knowledge. I investigate 2 types of knowledge content--information (i.e., facts or data) and frames (i.e., interpretations or impressions)--and explore whether tie strength influences their effect on creativity. Drawing on creativity theory, I employ an experimental design to provide greater theoretical clarity and to isolate causality. According to the results from 2 studies, distinct frames received from contacts facilitate creativity, but the effect of distinct information is more complex. When individuals receive distinct information from strong ties, it constrains creativity compared to distinct frames. Content from weak ties appears to facilitate creativity across all scenarios. The results of mediated moderation analysis indicate the effect of framing versus information for strong ties is driven by decision-making time, as an indicator of cognitive expansion. PsycINFO Database Record (c) 2014 APA, all rights reserved.

  3. Evaluation of longitudinal joint tie bar system.

    Science.gov (United States)

    2011-09-01

    "An adequate longitudinal joint tie bar system is essential in the overall performance of concrete pavement. Excessive : longitudinal joint openings are believed to be caused by either inadequate tie bar size or spacing or improper tie bar : installa...

  4. The tricarboxylic acid cycle activity in cultured primary astrocytes is strongly accelerated by the protein tyrosine kinase inhibitor tyrphostin 23

    DEFF Research Database (Denmark)

    Hohnholt, Michaela C; Blumrich, Eva-Maria; Waagepetersen, Helle S

    2017-01-01

    Tyrphostin 23 (T23) is a well-known inhibitor of protein tyrosine kinases and has been considered as potential anti-cancer drug. T23 was recently reported to acutely stimulate the glycolytic flux in primary cultured astrocytes. To investigate whether T23 also affects the tricarboxylic acid (TCA...... production. In addition, T23-treatment strongly increased the molecular carbon labeling of the TCA cycle intermediates citrate, succinate, fumarate and malate, and significantly increased the incorporation of (13)C-labelling into the amino acids glutamate, glutamine and aspartate. These results clearly...... demonstrate that, in addition to glycolysis, also the mitochondrial TCA cycle is strongly accelerated after exposure of astrocytes to T23, suggesting that a protein tyrosine kinase may be involved in the regulation of the TCA cycle in astrocytes....

  5. Instability of ties in compression

    DEFF Research Database (Denmark)

    Buch-Hansen, Thomas Cornelius

    2013-01-01

    exact instability solutions are complex to derive, not to mention the extra complexity introducing dimensional instability from the temperature gradients. Using an inverse variable substitution and comparing an exact theory with an analytical instability solution a method to design tie...... the temperature gradient between the outer and the inner wall, which results in critical increase of the bending moments in the ties. Since the ties are loaded by combined compression and moment forces, the loadbearing capacity is derived from instability equilibrium equations. Most of them are iterative, since......-connectors in cavity walls was developed. The method takes into account constraint conditions limiting the free length of the wall tie, and the instability in case of pure compression which gives an optimal load bearing capacity. The model is illustrated with examples from praxis....

  6. Leaving home, family support and intergenerational ties in Italy: Some regional differences

    Directory of Open Access Journals (Sweden)

    Elisabetta Santarelli

    2009-07-01

    Full Text Available In Italy conditions at leaving home are characterized by high age at exit, high proximity with parents and widespread intergenerational support, showing important regional differences. According to the "familistic" approach such conditions spread from strong intergenerational ties. Proximity and support are considered proxies of ties' strength so that different regional proximity and support correspond to different ties' intensities. The study aims at analyzing similarities and differences about parent-child ties, proximity and support in selected Italian regions, Liguria, Umbria, Sicily and Sardinia. Results show important differences among regions with respect to proximity and support, suggesting different intensity of intergenerational ties.

  7. Web API Growing Pains : Loosely Coupled yet Strongly Tied

    NARCIS (Netherlands)

    Espinha, T.; Zaidman, A.; Gross, H.G.

    2014-01-01

    Web APIs provide a systematic and extensible approach for application-toapplication interaction. Developers using web APIs are forced to accompany the API providers in their software evolution tasks. In order to understand the distress caused by this imposition on web API client developers we

  8. Rethinking "posterior" tongue-tie.

    Science.gov (United States)

    Douglas, Pamela Sylvia

    2013-12-01

    Currently, many clinicians who help with breastfeeding problems are diagnosing "posterior" tongue-tie in infants and performing or referring for frenotomy. In this "Speaking Out" article, I argue that the diagnosis of "posterior" tongue-tie has successfully raised awareness of the importance of impaired tongue function in breastfeeding difficulty. However, the diagnosis of "posterior" tongue-tie also applies a reductionist, medicalized theoretical frame to the complex problem of impaired tongue function, risking unintended outcomes. Impaired tongue function arises out of multiple interacting and co-evolving factors, including the interplay between social behaviors concerning breastfeeding and mother-infant biology. Consideration of theoretical frames is vital if we are to build an evidence base through efficient use of the scarce resources available for clinical breastfeeding research and minimize unintended outcomes.

  9. Role of Strong versus Weak Networks in Small Business Growth in an Emerging Economy

    Directory of Open Access Journals (Sweden)

    M. Kamil Kozan

    2014-02-01

    Full Text Available The study tests whether strong rather than weak ties account for small business growth in Turkey. Data were collected by means of a questionnaire filled out by the owners of small firms operating in four cities. Growth is comprised of two main areas, production expansion and knowledge acquisition. Results show that strong ties are positively related to both types of growth. In contrast, loose ties have no effect on small business growth in either area. This finding is attributed to the influence of the collectivistic nature of the mainstream Turkish culture, where owners of small businesses are likely to rely on in-groups rather than out-groups for advice and for financial support. Implications of relative absence of weak ties for small business growth and innovation in emerging economies are discussed. The findings suggest that culture should be included as a contingency variable in future studies of network strength and growth relationship. The paper also discusses the possible moderating role of affective and cognition-based trust in the relation of strong and weak ties to small business growth.

  10. The I3I Model; Identifying Cultural Determinants of Information Sharing via C2 Information Technologies

    Science.gov (United States)

    2009-06-01

    Individualist cultures represent loose ties between individuals where the interests of individuals prevail over the interests of the group and the...independence of individuals is emphasized. Individual accomplishments are valued whereas in collectivist cultures the group’s well being and common...goals and objectives are valued more. Collectivist cultures are characterized by tight social networks in which individuals strongly distinguish

  11. Do recruitment ties affect wages?

    DEFF Research Database (Denmark)

    Larsen, Anna Folke; Rand, John; Torm, Nina Elisabeth

    This paper examines the extent to which recruitment ties affect individual wage outcomes in small and medium scale manufacturing firms. Based on a unique matched employer-employee dataset from Vietnam we find that there is a significant positive wage premium associated with obtaining a job through...... an informal contact, when controlling for standard determinants of wage compensation. Moreover, we show that the mechanism through which informal contacts affect wages depends on the type of recruitment tie used. The findings are robust across location, firm size categories and different worker types....

  12. Family ties and depression across the life course: An Overview

    Directory of Open Access Journals (Sweden)

    Nienke Moor

    2012-08-01

    Full Text Available BACKGROUND Family ties in Europe are affected by demographic trends associated with parenting and partnering, such as a decline in fertility, an increase in childlessness, postponement of parenthood and of partnership formation, the rise of "new" relationship forms and divorce rates. It is unclear how the contemporary family structure and composition are associated with people's mental wellbeing. OBJECTIVE This article examines how ties with parents, siblings, a partner and children are associated with depressive mood of men and women in seven Eastern and Western European countries. METHODS To test our hypotheses we made use of data from the Generations and Gender Surveys. We performed logistic regression analyses to study the associations between people's family ties and depressive mood. RESULTS Our research findings show that family ties can diminish people's depressive feelings. Although we find some gender differences in these associations, we do not find support for the argument that family ties are more important for the mental wellbeing of women than of men. Moreover, our findings support the hierarchical model of family relations in which new ties with partner and children in adulthood gain precedence over the original primary ties with parents and siblings. Finally, we find that the association between family ties and depressive mood is quite similar in Eastern and Western Europe, but being married or having a partner more strongly reduces depressive feelings in Eastern than in Western Europe. CONCLUSIONS Although we did not dispose of longitudinal data, our research results do provide some indications about how demographic changes, for instance, those affecting family size -- the number of children or siblings -- might be associated with mental wellbeing. Our findings also suggest that the demographic trend of increasing partnership dissolution may have larger consequences for people's mental wellbeing in Eastern

  13. Topic Detection Based on Weak Tie Analysis: A Case Study of LIS Research

    Directory of Open Access Journals (Sweden)

    Ling Wei

    2016-11-01

    Full Text Available Purpose: Based on the weak tie theory, this paper proposes a series of connection indicators of weak tie subnets and weak tie nodes to detect research topics, recognize their connections, and understand their evolution. Design/methodology/approach: First, keywords are extracted from article titles and preprocessed. Second, high-frequency keywords are selected to generate weak tie co-occurrence networks. By removing the internal lines of clustered sub-topic networks, we focus on the analysis of weak tie subnets' composition and functions and the weak tie nodes' roles. Findings: The research topics' clusters and themes changed yearly; the subnets clustered with technique-related and methodology-related topics have been the core, important subnets for years; while close subnets are highly independent, research topics are generally concentrated and most topics are application-related; the roles and functions of nodes and weak ties are diversified. Research limitations: The parameter values are somewhat inconsistent; the weak tie subnets and nodes are classified based on empirical observations, and the conclusions are not verified or compared to other methods. Practical implications: The research is valuable for detecting important research topics as well as their roles, interrelations, and evolution trends. Originality/value: To contribute to the strength of weak tie theory, the research translates weak and strong ties concepts to co-occurrence strength, and analyzes weak ties' functions. Also, the research proposes a quantitative method to classify and measure the topics' clusters and nodes.

  14. Strong leadership and teamwork drive culture and performance change: Ohio State University Medical Center 2000-2006.

    Science.gov (United States)

    Sanfilippo, Fred; Bendapudi, Neeli; Rucci, Anthony; Schlesinger, Leonard

    2008-09-01

    Several characteristics of academic health centers have the potential to create high levels of internal conflict and misalignment that can pose significant leadership challenges. In September 2000, the positions of Ohio State University (OSU) senior vice president for health sciences, dean of the medical school, and the newly created position of chief executive officer of the OSU Medical Center (OSUMC) were combined under a single leader to oversee the OSUMC. This mandate from the president and trustees was modeled after top institutions with similar structures. The leader who assumed the role was tasked with improving OSUMC's academic, clinical, and financial performance. To achieve this goal, the senior vice president and his team employed the service value chain model of improving performance, based on the premise that leadership behavior/culture drives employee engagement/satisfaction, leading to customer satisfaction and improved organizational performance. Implementing this approach was a seven-step process: (1) selecting the right leadership team, (2) assessing the challenges and opportunities, (3) setting expectations for performance and leadership behavior, (4) aligning structures and functions, (5) engaging constituents, (6) developing leadership skills, and (7) defining strategies and tracking goals. The OSUMC setting during this period provides an observational case study to examine how these stepwise changes, instituted by strong leadership and teamwork, were able to make and implement sound decisions that drove substantial and measurable improvements in the engagement and satisfaction of faculty and staff; the satisfaction of students and patients; and academic, clinical, and financial performance.

  15. Resveratrol exhibits a strong cytotoxic activity in cultured cells and has an antiviral action against polyomavirus: potential clinical use

    Directory of Open Access Journals (Sweden)

    Galati Gaspare

    2009-07-01

    Full Text Available Abstract Background Resveratrol is a non flavonoid polyphenol compound present in many plants and fruits and, at especially high concentrations, in the grape berries of Vitis vinifera. This compound has a strong bioactivity and its cytoprotective action has been demonstrated, however at high concentrations the drug exhibits also an effective anti-proliferative action. We recently showed its ability to abolish the effects of oxidative stress in cultured cells. In this work we assayed the bioactivity of resveratrol as antiproliferative and antiviral drug in cultured fibroblasts. Studies by other Authors showed that this natural compound inhibits the proliferation of different viruses such as herpes simplex, varicella-zoster and influenza A. The results presented here show an evident toxic activity of the drug at high concentrations, on the other hand at sub-cytotoxic concentrations, resveratrol can effectively inhibit the synthesis of polyomavirus DNA. A possible interpretation is that, due to the damage caused by resveratrol to the plasma membrane, the transfer of the virus from the endoplasmic reticulum to the nucleus, may be hindered thus inhibiting the production of viral DNA. Methods The mouse fibroblast line 3T6 and the human tumor line HL60 were used throughout the work. Cell viability and vital cell count were assessed respectively, by the MTT assay and Trypan Blue staining. Cytotoxic properties and evaluation of viral DNA production by agarose gel electrophoresis were performed according to standard protocols. Results Our results show a clear dose dependent both cytotoxic and antiviral effect of resveratrol respectively at high and low concentrations. The cytotoxic action is exerted towards a stabilized cell-line (3T6 as well as a tumor-line (HL60. Furthermore the antiviral action is evident after the phase of virion entry, therefore data suggest that the drug acts during the synthesis of the viral progeny DNA. Conclusion Resveratrol is

  16. Networking by entrepreneurs: Patterns of tie-formation in emerging organizations

    NARCIS (Netherlands)

    Elfring, T.; Hulsink, W.

    2007-01-01

    There are two conflicting patterns of network development of founding entrepreneurs that emerge from existing literature. One of them evolves from an identity-based network dominated by strong ties into an intentionally managed network rich in weak ties. The other involves the opposite, with weak

  17. Peru turnaround tied to privatization

    International Nuclear Information System (INIS)

    Anon.

    1993-01-01

    Petroleos del Peru predicts a 10% increase in Peru's oil production this year and a further increase in 1994. Petroperu also forecasts a sharp increase in drilling in Peru this year. After several years of declining oil production, a gradual turnaround in the cash strapped country's petroleum industry is largely tied to its progress in privatization. The government last year began a campaign to privatize all state owned companies by the end of July 1995. The paper discusses forecasts by Petroperu; the contract of Occidental del Amazonas Inc.; the Petromar privatization; Great Western's contract; development of the Aguaytia gas field; and refinery contracts

  18. Family Ties: Reframing Memory, 2014

    OpenAIRE

    Bird, Nicky

    2014-01-01

    How might we read memory in relation to the family, and how might we enact these memories in visual form? This group exhibition addresses the representation of family memory through the lens-based works of six artists. Family Ties: Reframing Memory explores the bittersweet aspects of nostalgia, yet also questions the conflicts and contradictions inherent in acts of remembering. \\ud \\ud Suze Adams navigates the borders of fact and fiction in an exploratory re-tracing of her maternal ancestors....

  19. Ambivalent versus Problematic Social Ties: Implications for Psychological Health, Functional Health, and Interpersonal Coping

    Science.gov (United States)

    Rook, Karen S.; Luong, Gloria; Sorkin, Dara H.; Newsom, Jason T.; Krause, Neal

    2013-01-01

    Older adults often seek to manage their social networks to foster positive interactions, but they nonetheless sometimes experience negative interactions that detract from their health and well-being. Negative interactions may occur with ambivalent social partners (i.e., partners involved in both positive and negative exchanges) or exclusively problematic social partners (i.e., partners involved negative exchanges only), but conflicting views exist in the literature regarding which type of social partner is likely to be more detrimental to older adults’ physical and emotional health. This study examined the implications of the two kinds of network members for physical and psychological health and interpersonal coping responses in a representative sample of 916 older adults. Within this elderly sample, older age was associated with fewer ambivalent kin ties and fewer exclusively problematic kin ties. Analyses revealed that ambivalent social ties were more strongly related to functional health limitations than were exclusively problematic social ties, whereas problematic ties were more consistently related to psychological health than were ambivalent ties. Furthermore, negative exchanges that occurred with exclusively problematic social ties, as compared to those that occurred with ambivalent social ties, were associated with more avoidant and fewer conciliatory coping responses, stronger and longer-lasting negative emotions, and lower perceived coping effectiveness. A comprehensive understanding of the significance of social network ties in older adults’ lives may benefit not only from attention to sources of social support but also from efforts to distinguish between different sources of conflict and disappointment. PMID:22775360

  20. Social Ties for Labor Market Access

    DEFF Research Database (Denmark)

    Dorner, Matthias; Harhoff, Dietmar; Hinz, Tina

    in the German labor market after reunification. Modeling inventor migration to West German regions after 1990, we find that Western regions with stronger historically determined social ties across the former East-West border attracted more inventors after the fall of the Iron Curtain than regions without......We study the impact of social ties on the migration of inventors from East to West Germany, using the fall of the Iron Curtain and German reunification as a natural experiment. We identify East German inventors via their patenting track records prior to 1990 and their social security records...... such ties. However, mobility decisions made by inventors with outstanding patenting track records (star inventors) were not impacted by social ties. We conclude that social ties support labor market access for migrant inventors and determine regional choices while dependence on these ties is substantially...

  1. Hanging Together, Together Hung? Career Implications of Interpersonal Ties Between CEOs and Top Managers

    Directory of Open Access Journals (Sweden)

    Stefan Hilger

    2013-05-01

    Full Text Available Is it good or bad for senior executives to have strong interpersonal ties to the CEO? We argue that a strong relationship with the CEO raises the likelihood that a top manager stays in office or makes an upward career move when the CEO leaves office voluntarily. At the same time, such interpersonal ties also reinforce the negative spillover effects of a dismissal of the CEO on the career prospects of the manager concerned. Our empirical analysis lends support to both arguments. We contribute to managerial succession research by underlining the ambivalence of interpersonal ties within top management teams.

  2. Procalcitonin is a strong predictor of urine culture results in patients with obstructing ureteral stones: A prospective, pilot study

    Directory of Open Access Journals (Sweden)

    Dimitri Papagiannopoulos

    2016-01-01

    Conclusions: This proof-of-concept pilot study gives encouraging results, in that PCT was a good predictor of positive cultures (P = 0.02, AUC 0.812. Given, the small sample size, one cannot directly compare PCT to other markers of infection. However, PCT shows promise in this arena and warrants future investigation.

  3. Religion and ties between adult children and their parents.

    Science.gov (United States)

    King, Valarie; Ledwell, Maggie; Pearce-Morris, Jennifer

    2013-09-01

    This study examined whether religious adults (measured by the frequency of attendance at religious services) report more extensive ties with their parents. Using data from the National Survey of Families and Households (N = 9,002), a series of bivariate and multivariate regression models were tested. Several dimensions of adult children's relationships with their parents were considered including relationship quality, frequency of contact, providing care to parents, and providing other assistance. Adult children who attended religious services more frequently were significantly more likely to provide assistance to parents, and they reported higher quality relationships and more frequent contact with both their fathers and mothers. Results were similar for sons and daughters, and for younger and older adult children. A better understanding of what motivates and fosters strong ties between adult children and their parents is vitally important given the "graying" of America and the consequences of such ties for the health and well-being of both generations. Religion is only one of many factors associated with adult children's ties to parents, and this association is generally modest, but it is an important factor that should be given greater attention in future research.

  4. The emotional responses of browsing Facebook: Happiness, envy, and the role of tie strength.

    Science.gov (United States)

    Lin, Ruoyun; Utz, Sonja

    2015-11-01

    On Facebook, users are exposed to posts from both strong and weak ties. Even though several studies have examined the emotional consequences of using Facebook, less attention has been paid to the role of tie strength. This paper aims to explore the emotional outcomes of reading a post on Facebook and examine the role of tie strength in predicting happiness and envy. Two studies - one correlational, based on a sample of 207 American participants and the other experimental, based on a sample of 194 German participants - were conducted in 2014. In Study 2, envy was further distinguished into benign and malicious envy. Based on a multi-method approach, the results showed that positive emotions are more prevalent than negative emotions while browsing Facebook. Moreover, tie strength is positively associated with the feeling of happiness and benign envy, whereas malicious envy is independent of tie strength after reading a (positive) post on Facebook.

  5. [Neonatal tongue-tie: myths and science].

    Science.gov (United States)

    Dollberg, Shaul; Botzer, Eyal

    2011-01-01

    Anatomical restraining of tongue movement (tongue-tie, ankyloglossia) has been known for centuries and the subject of dozens of articles. The heated debate persists on its clinical significance and indications for treatment. Most authorities in the field of infant feeding and Lactation agree that breastfeeding problems, such as nipple pain and latching difficulties, are common signs of clinicaLly significant tongue-tie and indications for performing a frenotomy, while the sole presence of a visible lingual frenulum is not. In contrast, the lack of a visible frenulum does not rule out the diagnosis of clinically significant tongue-tie since submucosal ties, also called "posterior tongue-tie", may interfere with efficient breastfeeding. Whether tongue-tie interferes with speech articulation to a significant extent is currently unknown. Theoretically, articulation of some consonants (e.g., /s/, /th/, /r/) would be affected by impeded tongue movement. These articulation problems are, however, Less common than tongue-tie itself, and children and adults characteristically use various compensatory techniques of mouth opening and tongue movements. When it is indicated, frenotomy is performed by lifting the tongue and snipping the frenulum with scissors. Complications of frenotomy are rare and consist mainly of self-limited minor bleeding. The significance of posterior tongue tie and the long-term effects of frenotomy performed during early infancy are unresolved issues.

  6. Angiopoietin-1 receptor Tie2 distinguishes multipotent differentiation capability in bovine coccygeal nucleus pulposus cells.

    Science.gov (United States)

    Tekari, Adel; Chan, Samantha C W; Sakai, Daisuke; Grad, Sibylle; Gantenbein, Benjamin

    2016-05-23

    The intervertebral disc (IVD) has limited self-healing potential and disc repair strategies require an appropriate cell source such as progenitor cells that could regenerate the damaged cells and tissues. The objective of this study was to identify nucleus pulposus-derived progenitor cells (NPPC) and examine their potential in regenerative medicine in vitro. Nucleus pulposus cells (NPC) were obtained from 1-year-old bovine coccygeal discs by enzymatic digestion and were sorted for the angiopoietin-1 receptor Tie2. The obtained Tie2- and Tie2+ fractions of cells were differentiated into osteogenic, adipogenic, and chondrogenic lineages in vitro. Colony-forming units were prepared from both cell populations and the colonies formed were analyzed and quantified after 8 days of culture. In order to improve the preservation of the Tie2+ phenotype of NPPC in monolayer cultures, we tested a selection of growth factors known to have stimulating effects, cocultured NPPC with IVD tissue, and exposed them to hypoxic conditions (2 % O2). After 3 weeks of differentiation culture, only the NPC that were positive for Tie2 were able to differentiate into osteocytes, adipocytes, and chondrocytes as characterized by calcium deposition (p nucleus pulposus contains NPPC that are Tie2+. These cells fulfilled formally progenitor criteria that were maintained in subsequent monolayer culture for up to 7 days by addition of FGF2 or hypoxic conditions. We propose that the nucleus pulposus represents a niche of precursor cells for regeneration of the IVD.

  7. Analyzing negative ties in social networks

    Directory of Open Access Journals (Sweden)

    Mankirat Kaur

    2016-03-01

    Full Text Available Online social networks are a source of sharing information and maintaining personal contacts with other people through social interactions and thus forming virtual communities online. Social networks are crowded with positive and negative relations. Positive relations are formed by support, endorsement and friendship and thus, create a network of well-connected users whereas negative relations are a result of opposition, distrust and avoidance creating disconnected networks. Due to increase in illegal activities such as masquerading, conspiring and creating fake profiles on online social networks, exploring and analyzing these negative activities becomes the need of hour. Usually negative ties are treated in same way as positive ties in many theories such as balance theory and blockmodeling analysis. But the standard concepts of social network analysis do not yield same results in respect of each tie. This paper presents a survey on analyzing negative ties in social networks through various types of network analysis techniques that are used for examining ties such as status, centrality and power measures. Due to the difference in characteristics of flow in positive and negative tie networks some of these measures are not applicable on negative ties. This paper also discusses new methods that have been developed specifically for analyzing negative ties such as negative degree, and h∗ measure along with the measures based on mixture of positive and negative ties. The different types of social network analysis approaches have been reviewed and compared to determine the best approach that can appropriately identify the negative ties in online networks. It has been analyzed that only few measures such as Degree and PN centrality are applicable for identifying outsiders in network. For applicability in online networks, the performance of PN measure needs to be verified and further, new measures should be developed based upon negative clique concept.

  8. The emergence of cooperation in tie strength models

    International Nuclear Information System (INIS)

    Xu, Bo; Yue, Yunpeng

    2016-01-01

    In this paper, we propose a tie strength model to explain the emergence of cooperation in spatial prisoner's dilemma games, assuming that cooperators preferentially allocate their investments to friends with strong ties. Two types of prisoner's dilemma models are examined in this study: the traditional two-strategy model considering only cooperators and defectors; the expanded three-strategy model consisting cooperators, defectors and extortioners. The results show that tie strength model contributes to the promotion of cooperation in both types of prisoner's dilemma games. However, we point out that the influence of the investment preference is quite different in the two prisoner's dilemma game settings. In the two-strategy prisoner's dilemma game, only small preference contributes to the promotion of cooperation. Once this preference exceeds a critical value, cooperation will be prohibited. We explain this phenomenon by arguing that extremely strong investment preference undermines the ability of cooperative clusters to resist defectors. Moreover, we extend the analysis into the three-strategy case and discover that the catalytic effect of extortioners can eliminate this first up and then down trend in the two-strategy model. The equilibrium fraction of cooperators is always positively correlated to the level of investment preference in three-strategy models.

  9. The Strength of the Strongest Ties in Collaborative Problem Solving

    DEFF Research Database (Denmark)

    de Montjoye, Yves-Alexandre; Stopczynski, Arkadiusz; Shmueli, Erez

    2014-01-01

    Complex problem solving in science, engineering, and business has become a highly collaborative endeavor. Teams of scientists or engineers collaborate on projects using their social networks to gather new ideas and feedback. Here we bridge the literature on team performance and information networks...... by studying teams' problem solving abilities as a function of both their within-team networks and their members' extended networks. We show that, while an assigned team's performance is strongly correlated with its networks of expressive and instrumental ties, only the strongest ties in both networks have......-significant in the statistical analysis. Our results have consequences for the organization of teams of scientists, engineers, and other knowledge workers tackling today's most complex problems....

  10. Tongue tie: the evidence for frenotomy.

    Science.gov (United States)

    Brookes, Alastair; Bowley, Douglas M

    2014-11-01

    Tongue tie or ankyloglossia is a congenital variation characterised by a short lingual frenulum which may result in restriction of tongue movement and thus impact on function. Tongue tie division (frenotomy) in affected infants with breastfeeding problems yields objective improvements in milk production and breastfeeding characteristics, including objective scoring measures, weight gain and reductions in maternal pain. For the majority of mothers, frenotomy appears to enhance maintenance of breastfeeding. Tongue tie division is a safe procedure with minimal complications. The commonest complication is minor bleeding. Recurrence leading to redivision occurs with rates of 0.003-13% reported; this appears to be more common with posterior than anterior ties. There are limited reports indicating that prophylactic frenotomy may promote subsequent speech development; however, evidence is currently insufficient to condone this practice and further good quality research into this area is warranted. Copyright © 2014 Elsevier Ltd. All rights reserved.

  11. Construction loads experienced by plastic composite ties.

    Science.gov (United States)

    2014-07-01

    Damage to plastic composite ties during handling and track installation has been reported by a number of railroads. Results from : a survey conducted to identify specific handling issues were used to develop field and laboratory tests to measure the ...

  12. Traditional Tie-dye Handicrafts and Modern Design Concept Combined

    Directory of Open Access Journals (Sweden)

    Ju Fengfan

    2017-09-01

    Full Text Available Tie-dyeing is the traditional handicraft in china, and this traditional handicraft is the accumulation of people's wisdom and the survival of the skills.Due to rapid economic development in recent decades, spurred in pursuit of excessive consumption of fast, fast fashion, industrial production gradually replaced the traditional handicraft, resulting in many of the traditional handicraft industry is facing a crisis.How does the traditional tie-dye craft blend with modern lifestyles?It has become a pressing issue.And in modern society, people pay more attention to practicality, cultural and spiritual combination. there is a certain regional and differences in traditional culture and it aesthetic point of view, inevitably conflicting with the modern design concept.But this contradiction can be reconciled, we should be in the traditional level of culture to be in-depth research and application, based on the research of the traditional design and analysis from refining, refactoring, transforming in line with modern aesthetic standards.

  13. Analysis of ICPP fuel storage rack inner tie and corner tie substructures

    Energy Technology Data Exchange (ETDEWEB)

    Nitzel, M.E.; Rahl, R.G.

    1996-01-01

    Finite element models were developed and analyses performed for the tie plate, inner tie block assembly, and corner tie block assembly of a 25 port fuel rack assembly designed for installation in Pool 1 of Building 666 at the Idaho Chemical Processing Plant. These models were specifically developed to investigate the adequacy of certain welds joining components of the fuel storage rack assembly. The work scope for the task was limited to an investigation of the stress levels in the subject subassemblies when subjected to seismic loads. Structural acceptance criteria used for the elastic calculations performed were as found in the overall rack design report as issued by the rack`s designer, Holtec International. Structural acceptance criteria used for the plastic calculations performed as part of this effort were as defined in Subsection NF and Appendix F of the ASME Boiler & Pressure Vessel Code. The results of the analyses will also apply to the 30 port fuel storage rack design that is also scheduled for installation in Pool 1 of ICPP 666. The results obtained from the analyses performed for this task indicate that the welds joining the inner tie block and corner tie block to the surrounding rack structure meet the acceptance criteria. Further, the structural members (plates and blocks) were also found to be within the allowable stress limits established by the acceptance criteria. The separate analysis performed on the inner tie plate confirmed the structural adequacy for both the inner tie plate, corner tie plate, and tie block bolts. The analysis results verified that the inner tie and corner tie block should be capable of transferring the expected seismic load without structural failure.

  14. Analysis of ICPP fuel storage rack inner tie and corner tie substructures

    International Nuclear Information System (INIS)

    Nitzel, M.E.; Rahl, R.G.

    1996-01-01

    Finite element models were developed and analyses performed for the tie plate, inner tie block assembly, and corner tie block assembly of a 25 port fuel rack assembly designed for installation in Pool 1 of Building 666 at the Idaho Chemical Processing Plant. These models were specifically developed to investigate the adequacy of certain welds joining components of the fuel storage rack assembly. The work scope for the task was limited to an investigation of the stress levels in the subject subassemblies when subjected to seismic loads. Structural acceptance criteria used for the elastic calculations performed were as found in the overall rack design report as issued by the rack's designer, Holtec International. Structural acceptance criteria used for the plastic calculations performed as part of this effort were as defined in Subsection NF and Appendix F of the ASME Boiler ampersand Pressure Vessel Code. The results of the analyses will also apply to the 30 port fuel storage rack design that is also scheduled for installation in Pool 1 of ICPP 666. The results obtained from the analyses performed for this task indicate that the welds joining the inner tie block and corner tie block to the surrounding rack structure meet the acceptance criteria. Further, the structural members (plates and blocks) were also found to be within the allowable stress limits established by the acceptance criteria. The separate analysis performed on the inner tie plate confirmed the structural adequacy for both the inner tie plate, corner tie plate, and tie block bolts. The analysis results verified that the inner tie and corner tie block should be capable of transferring the expected seismic load without structural failure

  15. TIE: an ability test of emotional intelligence.

    Directory of Open Access Journals (Sweden)

    Magdalena Śmieja

    Full Text Available The Test of Emotional Intelligence (TIE is a new ability scale based on a theoretical model that defines emotional intelligence as a set of skills responsible for the processing of emotion-relevant information. Participants are provided with descriptions of emotional problems, and asked to indicate which emotion is most probable in a given situation, or to suggest the most appropriate action. Scoring is based on the judgments of experts: professional psychotherapists, trainers, and HR specialists. The validation study showed that the TIE is a reliable and valid test, suitable for both scientific research and individual assessment. Its internal consistency measures were as high as .88. In line with theoretical model of emotional intelligence, the results of the TIE shared about 10% of common variance with a general intelligence test, and were independent of major personality dimensions.

  16. TIE: An Ability Test of Emotional Intelligence

    Science.gov (United States)

    Śmieja, Magdalena; Orzechowski, Jarosław; Stolarski, Maciej S.

    2014-01-01

    The Test of Emotional Intelligence (TIE) is a new ability scale based on a theoretical model that defines emotional intelligence as a set of skills responsible for the processing of emotion-relevant information. Participants are provided with descriptions of emotional problems, and asked to indicate which emotion is most probable in a given situation, or to suggest the most appropriate action. Scoring is based on the judgments of experts: professional psychotherapists, trainers, and HR specialists. The validation study showed that the TIE is a reliable and valid test, suitable for both scientific research and individual assessment. Its internal consistency measures were as high as .88. In line with theoretical model of emotional intelligence, the results of the TIE shared about 10% of common variance with a general intelligence test, and were independent of major personality dimensions. PMID:25072656

  17. A comparison of plastic cable ties based on physical, chemical and stable isotopic measurements.

    Science.gov (United States)

    Nienaber, Lisa M; Cresswell, Sarah L; Carter, James F; Peter, Tony

    2018-01-01

    originated from the same manufacturing batch. The authors reason that a likelihood ratio (that might be presented to a Court of law) can be derived from this type of discrete data based on a calculation of the possible combinations of distinguishable objects (unordered sampling with replacement) in a convenience sample collected from the background population. In this example, a database of 19 distinguishable objects can yield a likelihood ratio as high as 210, with a verbal equivalent of "moderately strong support" for a proposition that two cable ties have the same isotopic composition because they originate from the same batch rather than by random chance. Crown Copyright © 2017. Published by Elsevier B.V. All rights reserved.

  18. The Orphan Receptor Tie1 Controls Angiogenesis and Vascular Remodeling by Differentially Regulating Tie2 in Tip and Stalk Cells

    Directory of Open Access Journals (Sweden)

    Soniya Savant

    2015-09-01

    Full Text Available Tie1 is a mechanistically poorly characterized endothelial cell (EC-specific orphan receptor. Yet, Tie1 deletion is embryonic lethal and Tie1 has been implicated in critical vascular pathologies, including atherosclerosis and tumor angiogenesis. Here, we show that Tie1 does not function independently but exerts context-dependent effects on the related receptor Tie2. Tie1 was identified as an EC activation marker that is expressed during angiogenesis by a subset of angiogenic tip and remodeling stalk cells and downregulated in the adult quiescent vasculature. Functionally, Tie1 expression by angiogenic EC contributes to shaping the tip cell phenotype by negatively regulating Tie2 surface presentation. In contrast, Tie1 acts in remodeling stalk cells cooperatively to sustain Tie2 signaling. Collectively, our data support an interactive model of Tie1 and Tie2 function, in which dynamically regulated Tie1 versus Tie2 expression determines the net positive or negative effect of Tie1 on Tie2 signaling.

  19. Commercial lumber, round timbers, and ties

    Science.gov (United States)

    David E. Kretschmann

    2010-01-01

    When sawn, a log yields round timber, ties, or lumber of varying quality. This chapter presents a general discussion of grading, standards, and specifications for these commercial products. In a broad sense, commercial lumber is any lumber that is bought or sold in the normal channels of commerce. Commercial lumber may be found in a variety of forms, species, and types...

  20. Weizmann ties with Cambridge in physics contest

    CERN Multimedia

    Siegel, J

    2004-01-01

    "Scientists and students from the Weizmann Institute of Science in Rehovot and Cambridge University in England have tied for first place in a physics competition aimed at simulating the future functioning of the particle accelerator being built at the European center CERN and due to open in 2007" (1/2 page)

  1. Chemical topology: Tying up some loose ends

    Science.gov (United States)

    Fenlon, Edward E.

    2010-03-01

    A linear molecule containing three bipyridine ligands can be wrapped around a single metal-ion template to form an open-knot complex. The loose ends of the knot can be 'tied' together through esterification or olefin-metathesis reactions to form closed knots that do not unravel when the metal template is removed.

  2. COMMITMENT A Psychological Tie and Moral Value

    Science.gov (United States)

    2017-04-01

    AIR WAR COLLEGE AIR UNIVERSITY COMMITMENT A Psychological Tie and Moral Value by Shelly L. Mendieta, Lieutenant Colonel, United...there are also psychological and behavioral aspects to commitment. The Meyers and Allen three- component model of organizational commitment...Eight readings are offered as a foundation of the psychological , philosophical, and ethical literature as well as distinguish the concept of

  3. The “parallel diplomacy” of Mussolini in Brazil: cultural, migratory and political ties in a power project (1922-1943 | La “diplomacia paralela” de Mussolini en Brasil: vínculos culturales, emigratorios y políticos en un proyecto de poder (1922-1943

    Directory of Open Access Journals (Sweden)

    João Fábio Bertonha

    2012-12-01

    Full Text Available During the interwar period, Italy tried to expand its influence in Latin America and especially in Brazil. Without the military and economic power required for direct action, Italy used "alternative" methods to increase its force in the country. The methods used were the propaganda, mainly cultural, the mobilization of Italian communities in the country and the creation of political ties with the local fascist movement and with the Vargas regime. This paper seeks to understand this effort and the articulation of all these elements (culture, politics and population links in a project of power, as well as its results. | Durante el período de entreguerras, el régimen fascista italiano actuó con vigor con el objetivo de ampliar su influencia en América Latina y de manera especial en Brasil. Sin tener la posibilidad de utilizar la fuerza militar y condicionada por la reducción de los recursos económicos a la que se vio abocada, Italia, sin embargo, utilizó métodos “alternativos” para aumentar su presencia en el país. En esencia, los mecanismos empleados fueron la propaganda –especialmente la cultural–, la movilización de la comunidad emigrada y la búsqueda de lazos con el fascismo local y con el gobierno de Vargas. Este trabajo intenta comprender este esfuerzo italiano mediante la articulación de esos elementos (cultura, política y vínculos con la población para configurar su proyecto de poder.

  4. Freeze-thaw performance testing of whole concrete railroad ties.

    Science.gov (United States)

    2013-10-01

    Freezing and thawing durability tests of prestressed concrete ties are normally performed according to ASTM C666 specifications. Small specimens are cut from the shoulders of concrete ties and tested through 300 cycles of freezing and thawing. Saw-cu...

  5. Performance evaluation of concrete railroad ties on the northeast corridor.

    Science.gov (United States)

    2014-03-01

    Simpson Gumpertz & Heger Inc. conducted an investigation into the factors that caused widespread failure in prestressed concrete : railroad ties on the Northeast Corridor. The problem was apparent in ties manufactured and installed circa 19941998....

  6. The effects of integration and transnational ties on international return migration intentions

    Directory of Open Access Journals (Sweden)

    Hein de Haas

    2011-12-01

    Full Text Available While return migration is receiving increasing attention, there is still insufficient insight into the factors which determine migrants' intentions and decisions to return. It is often assumed that integration in receiving countries and the concomitant weakening of transnational ties decreases the likelihood of returning. However, according to alternative theoretical interpretations, return migration can also be the outflow of successful integration in receiving countries. Drawing on a data set of four African immigrant groups in Spain and Italy, this articlereviews these conflicting hypotheses by assessing the effects of integration and transnational ties on return migration intentions. The results of the analysis suggest that socio-cultural integration has a negative effect on return migration intentions, while economic integration and transnational ties have more ambiguous and sometimes positive effects. The results provide mixed support for the different hypotheses but question theoretical perspectives that unequivocally conceptualizereturn migration and transnationalism as causes and/or consequences of "integration failure".

  7. Grid-Tied Photovoltaic Power System

    Science.gov (United States)

    Eichenberg, Dennis J.

    2011-01-01

    A grid-tied photovoltaic (PV) power system is connected directly to the utility distribution grid. Facility power can be obtained from the utility system as normal. The PV system is synchronized with the utility system to provide power for the facility, and excess power is provided to the utility. Operating costs of a PV power system are low compared to conventional power technologies. This method can displace the highest-cost electricity during times of peak demand in most climatic regions, and thus reduce grid loading. Net metering is often used, in which independent power producers such as PV power systems are connected to the utility grid via the customers main service panels and meters. When the PV power system is generating more power than required at that location, the excess power is provided to the utility grid. The customer pays the net of the power purchased when the on-site power demand is greater than the onsite power production, and the excess power is returned to the utility grid. Power generated by the PV system reduces utility demand, and the surplus power aids the community. Modern PV panels are readily available, reliable, efficient, and economical, with a life expectancy of at least 25 years. Modern electronics have been the enabling technology behind grid-tied power systems, making them safe, reliable, efficient, and economical with a life expectancy equal to the modern PV panels. The grid-tied PV power system was successfully designed and developed, and this served to validate the basic principles developed, and the theoretical work that was performed. Grid-tied PV power systems are reliable, maintenance- free, long-life power systems, and are of significant value to NASA and the community. Of particular value are the analytical tools and capabilities that have been successfully developed. Performance predictions can be made confidently for grid-tied PV systems of various scales. The work was done under the NASA Hybrid Power Management (HPM

  8. RUSSIAN LANGUAGE IN NORTHERN NORWAY: HISTORICAL, ECONOMIC AND CULTURAL TIES

    Directory of Open Access Journals (Sweden)

    Маргарита Ольнова

    2017-12-01

    Full Text Available This article addresses the topic “Commodification of the Russian language”. The author examines the process of commodification in the Norwegian city of Kirkenes and connects this phenomenon with the rise of the new economy and the current cooperation between Russia and Norway. The paper pre-sents an analysis of the linguistic landscape of Kirkenes, newspaper publications devoted to the “Russian Kirkenes” and interviews with Russian tourists and residents of the city. According to the author, the situation in Kirkenes illustrates the transition of the old economy into a new one: the former mining city turned into a tourist Mecca of the North, a center of cooperation of the Nordic countries. In such conditions, know-ledge of the Russian language becomes beneficial for the city's residents.

  9. Platelet-rich plasma extract prevents pulmonary edema through angiopoietin-Tie2 signaling.

    Science.gov (United States)

    Mammoto, Tadanori; Jiang, Amanda; Jiang, Elisabeth; Mammoto, Akiko

    2015-01-01

    Increased vascular permeability contributes to life-threatening pathological conditions, such as acute respiratory distress syndrome. Current treatments for sepsis-induced pulmonary edema rely on low-tidal volume mechanical ventilation, fluid management, and pharmacological use of a single angiogenic or chemical factor with antipermeability activity. However, it is becoming clear that a combination of multiple angiogenic/chemical factors rather than a single factor is required for maintaining stable and functional blood vessels. We have demonstrated that mouse platelet-rich plasma (PRP) extract contains abundant angiopoietin (Ang) 1 and multiple other factors (e.g., platelet-derived growth factor), which potentially stabilize vascular integrity. Here, we show that PRP extract increases tyrosine phosphorylation levels of Tunica internal endothelial cell kinase (Tie2) and attenuates disruption of cell-cell junctional integrity induced by inflammatory cytokine in cultured human microvascular endothelial cells. Systemic injection of PRP extract also increases Tie2 phosphorylation in mouse lung and prevents endotoxin-induced pulmonary edema and the consequent decreases in lung compliance and exercise intolerance resulting from endotoxin challenge. Soluble Tie2 receptor, which inhibits Ang-Tie2 signaling, suppresses the ability of PRP extract to inhibit pulmonary edema in mouse lung. These results suggest that PRP extract prevents endotoxin-induced pulmonary edema mainly through Ang-Tie2 signaling, and PRP extract could be a potential therapeutic strategy for sepsis-induced pulmonary edema and various lung diseases caused by abnormal vascular permeability.

  10. The effect of plasma flow on line-tied magnetohydrodynamic modes

    International Nuclear Information System (INIS)

    Arcudi, Francesco; Delzanno, Gian Luca; Finn, John M.

    2010-01-01

    The linear stability of a linear pinch to kink modes with line-tying boundary conditions and equilibrium axial flow is studied. Numerical results in visco-resistive magnetohydrodynamics show that for long plasmas, in which the line-tying stabilization effect is weak, plasma flow is stabilizing. For shorter plasmas, near the length at which line-tying stabilizes the mode for zero flow, the flow can be destabilizing. A simple model using reduced ideal magnetohydrodynamics with a step-function current density and an even simpler one-dimensional sound wave model with equilibrium flow elucidate these effects. It is concluded that: (1) The stabilization in long plasmas is due to convective stabilization; (2) the destabilization for short plasmas can be explained using a picture involving the coupling of two stable waves, one propagating in the forward direction and one in the backward direction; and (3) strong magnetic shear suppresses the flow destabilization for short plasmas.

  11. The Strength of Weak Ties in MBA Job Search: A Within–Person Test

    Directory of Open Access Journals (Sweden)

    Jason Greenberg

    2016-05-01

    Full Text Available Whether and how social ties create value has inspired substantial research in organizational theory, sociology, and economics. Scholars generally believe that social ties impact labor market outcomes. Two explanatory mechanisms have been identified, emphasizing access to better job offers in pecuniary terms and the efficacy of non-redundant information. The evidence informing each theory, however, has been inconsistent and circumstantial. We test predictions from both models using a rich set of job search data collected from an MBA student population, including detailed information about search channels and characteristics of job offers. Importantly, we can compare offers made to the same student derived via different search channels while accounting for industry, function, and non-pecuniary characteristics. We find that contrary to conventional wisdom, search through social networks typically results in job offers with lower total compensation (-17 percent for referrals through strong ties and -16 percent for referrals via weak ties vs. formal search. However, our models also show that students are considerably more likely to accept offers derived via weak ties. They do so because they are perceived to have greater growth potential and other non-pecuniary value. On balance, our tests are consistent with Granovetter’s argument that networks provide value by facilitating access to information that is otherwise difficult to obtain, rather than providing greater pecuniary compensation.

  12. Twist1 controls lung vascular permeability and endotoxin-induced pulmonary edema by altering Tie2 expression.

    Science.gov (United States)

    Mammoto, Tadanori; Jiang, Elisabeth; Jiang, Amanda; Lu, Yongbo; Juan, Aimee M; Chen, Jing; Mammoto, Akiko

    2013-01-01

    Tight regulation of vascular permeability is necessary for normal development and deregulated vascular barrier function contributes to the pathogenesis of various diseases, including acute respiratory distress syndrome, cancer and inflammation. The angiopoietin (Ang)-Tie2 pathway is known to control vascular permeability. However, the mechanism by which the expression of Tie2 is regulated to control vascular permeability has not been fully elucidated. Here we show that transcription factor Twist1 modulates pulmonary vascular leakage by altering the expression of Tie2 in a context-dependent way. Twist1 knockdown in cultured human lung microvascular endothelial cells decreases Tie2 expression and phosphorylation and increases RhoA activity, which disrupts cell-cell junctional integrity and increases vascular permeability in vitro. In physiological conditions, where Ang1 is dominant, pulmonary vascular permeability is elevated in the Tie2-specific Twist1 knockout mice. However, depletion of Twist1 and resultant suppression of Tie2 expression prevent increase in vascular permeability in an endotoxin-induced lung injury model, where the balance of Angs shifts toward Ang2. These results suggest that Twist1-Tie2-Angs signaling is important for controlling vascular permeability and modulation of this mechanism may lead to the development of new therapeutic approaches for pulmonary edema and other diseases caused by abnormal vascular permeability.

  13. Vínculos organizacionais Organizational ties

    Directory of Open Access Journals (Sweden)

    Gustavo Garcez Kramer

    2007-02-01

    Full Text Available Este artigo é um estudo de caso único, realizado junto a uma organização pública municipal de Curitiba, e tem como objetivo investigar e compreender os vínculos organizacionais. O estudo dos vínculos é feito por meio dos seus elementos constitutivos: a identificação, o sentimento de pertença, a cooperação, a participação, a criação de inimigos, a idealização, o reconhecimento e valorização dos indivíduos, a solidariedade, a integração, o crescimento e desenvolvimento pessoal e profissional e a autonomia. Foram utilizados, como instrumentos de coleta, questionário fechado e análise documental. O resultado dessa pesquisa é a caracterização dos elementos que são importantes na formação e manutenção dos vínculos e, conseqüentemente, para o comprometimento dos empregados com os objetivos, políticas, problemas, desempenho e resultados da organização.This article presents a unique case study of the organizational ties in a public municipal organization in the city of Curitiba, Brazil. The ties are studied through their constitutive elements: identification, sense of belonging, cooperation, participation, creation of enemies, idealization, recognition and appreciation of individuals, solidarity, integration, professional and personal development and growth, and autonomy. Documental analysis and closed questionnaires were used for data collection. The research resulted in the characterization of the elements that are important in making and keeping ties, and consequently committing employees to the organization's objectives, policies, problems, performance and results.

  14. Neighborhoods and Intimate Partner Violence Against Women: The Direct and Interactive Effects of Social Ties and Collective Efficacy.

    Science.gov (United States)

    Wright, Emily M; Skubak Tillyer, Marie

    2017-06-01

    This study examines the impact of several indicators of neighborhood social ties (e.g., residents' interactions with each other; residents' ability to recognize outsiders) on intimate partner violence (IPV) against women as well as whether neighborhood collective efficacy's impact on IPV is contingent upon such ties. This study used data from 4,151 women (46% Latina, 33% African American, 17% Caucasian, on average 32 years old) in 80 neighborhoods from the Project on Human Development in Chicago Neighborhoods. We estimated a series of random effects hierarchical Bernoulli models to assess the main and interactive effects of neighborhood social ties and collective efficacy on minor and severe forms of IPV against women. Results indicate that certain neighborhood social ties are associated with higher rates of minor forms of IPV against women (but not severe forms of IPV), and collective efficacy does not appear to influence IPV against women, regardless of the level of individual or neighborhood social ties. Unlike street crime, collective efficacy does not significantly reduce IPV against women, even in neighborhoods with strong social ties that may facilitate awareness of the violence. In fact, perpetrators of minor IPV may enjoy some protective benefit in communities with social ties that make neighbors hesitant to intervene in what some might perceive as "private matters."

  15. The Running Barbed Tie-over Dressing.

    Science.gov (United States)

    Joyce, Cormac W; Joyce, Kenneth M; Kennedy, Ann-Marie; Kelly, Jack L

    2014-04-01

    Barbed suture technology is becoming increasingly popular in plastic surgery and is now being used in body contouring surgery and facial rejuvenation. We describe the novel application of a barbed suture as a running tie-over dressing for skin grafts. The barbs act as anchors in the skin, so constant tensioning of the suture is not required. The bidirectional nature of the suture prevents any slippage, and the barbs even act as a grip on the underlying wool dressing. Furthermore, the method described is both quick and simple to learn and would be useful for the sole operator.

  16. The Running Barbed Tie-over Dressing

    Directory of Open Access Journals (Sweden)

    Cormac W. Joyce, MB, BCh, MRCSI

    2014-04-01

    Full Text Available Summary: Barbed suture technology is becoming increasingly popular in plastic surgery and is now being used in body contouring surgery and facial rejuvenation. We describe the novel application of a barbed suture as a running tie-over dressing for skin grafts. The barbs act as anchors in the skin, so constant tensioning of the suture is not required. The bidirectional nature of the suture prevents any slippage, and the barbs even act as a grip on the underlying wool dressing. Furthermore, the method described is both quick and simple to learn and would be useful for the sole operator.

  17. Breastfeeding improvement following tongue-tie and lip-tie release: A prospective cohort study.

    Science.gov (United States)

    Ghaheri, Bobak A; Cole, Melissa; Fausel, Sarah C; Chuop, Maria; Mace, Jess C

    2017-05-01

    Numerous symptoms may arise that prevent mother-infant dyads from maintaining desired breastfeeding intervals. Investigations into treatments that positively influence breastfeeding outcomes allow for improved patient counseling for treatment decisions to optimize breastfeeding quality. This investigation aimed to determine the impact of surgical tongue-tie/lip-tie release on breastfeeding impairment. Prospective, cohort study from June 2014 to April 2015 in a private practice setting. Study participants consisted of breastfeeding mother-infant (0-12 weeks of age) dyads with untreated ankyloglossia and/or tethered maxillary labial frenula who completed preoperative, 1 week, and 1 month postoperative surveys consisting of the Breastfeeding Self-Efficacy Scale-Short Form (BSES-SF), visual analog scale (VAS) for nipple pain severity, and the revised Infant Gastroesophageal Reflux Questionnaire (I-GERQ-R). Breastmilk intake was measured preoperatively and 1 week postoperatively. A total of 237 dyads were enrolled after self-electing laser lingual frenotomy and/or maxillary labial frenectomy. Isolated posterior tongue-tie was identified in 78% of infants. Significant postoperative improvements were reported between mean preoperative scores compared to 1 week and 1 month scores of the BSES-SF (F (2) = 212.3; P < .001), the I-GERQ-R (F (2) = 85.3; P < .001), and VAS pain scale (F (2) = 259.8; P < .001). Average breastmilk intake improved 155% from 3.0 (2.9) to 4.9 (4.5) mL/min (P < .001). Surgical release of tongue-tie/lip-tie results in significant improvement in breastfeeding outcomes. Improvements occur early (1 week postoperatively) and continue to improve through 1 month postoperatively. Improvements were demonstrated in both infants with classic anterior tongue-tie and less obvious posterior tongue-tie. This study identifies a previously under-recognized patient population that may benefit from surgical intervention if abnormal breastfeeding symptoms exist. 2c

  18. Breastfeeding improvement following tongue‐tie and lip‐tie release: A prospective cohort study

    Science.gov (United States)

    Cole, Melissa; Fausel, Sarah C.; Chuop, Maria; Mace, Jess C.

    2016-01-01

    Objectives/Hypothesis Numerous symptoms may arise that prevent mother‐infant dyads from maintaining desired breastfeeding intervals. Investigations into treatments that positively influence breastfeeding outcomes allow for improved patient counseling for treatment decisions to optimize breastfeeding quality. This investigation aimed to determine the impact of surgical tongue‐tie/lip‐tie release on breastfeeding impairment. Study Design Prospective, cohort study from June 2014 to April 2015 in a private practice setting. Methods Study participants consisted of breastfeeding mother–infant (0–12 weeks of age) dyads with untreated ankyloglossia and/or tethered maxillary labial frenula who completed preoperative, 1 week, and 1 month postoperative surveys consisting of the Breastfeeding Self‐Efficacy Scale‐Short Form (BSES‐SF), visual analog scale (VAS) for nipple pain severity, and the revised Infant Gastroesophageal Reflux Questionnaire (I‐GERQ‐R). Breastmilk intake was measured preoperatively and 1 week postoperatively. Results A total of 237 dyads were enrolled after self‐electing laser lingual frenotomy and/or maxillary labial frenectomy. Isolated posterior tongue‐tie was identified in 78% of infants. Significant postoperative improvements were reported between mean preoperative scores compared to 1 week and 1 month scores of the BSES‐SF (F (2) = 212.3; P < .001), the I‐GERQ‐R (F (2) = 85.3; P < .001), and VAS pain scale (F (2) = 259.8; P < .001). Average breastmilk intake improved 155% from 3.0 (2.9) to 4.9 (4.5) mL/min (P < .001). Conclusions Surgical release of tongue‐tie/lip‐tie results in significant improvement in breastfeeding outcomes. Improvements occur early (1 week postoperatively) and continue to improve through 1 month postoperatively. Improvements were demonstrated in both infants with classic anterior tongue‐tie and less obvious posterior tongue‐tie. This study identifies a previously under‐recognized patient

  19. BSE Rap: intergenerational ties to save lives.

    Science.gov (United States)

    Ehmann, J L

    1993-09-01

    This article presents an innovative public-education strategy that was created to promote breast health awareness and early breast cancer detection among minority and low-income adolescent females. Given the importance of teaching breast self-examination (BSE), program development focused on creation of the BSE Rap, a lively music-video presentation. Increasing adolescents' knowledge and awareness of BSE is viewed as a springboard for disseminating information to their mothers and grandmothers. Funding was obtained for production of a video and a breast health diary, which are the program's key components. Marketing strategies included contacts with community organizations and healthcare professionals. Program evaluations reveal that the BSE Rap serves as a positive motivator for participants to discuss BSE and mammography with their mothers and grandmothers. The BSE Rap offers oncology nurses the opportunity to save lives using a unique and creative tool that focuses on intergenerational ties.

  20. Cultural

    Science.gov (United States)

    Wilbur F. LaPage

    1971-01-01

    A critical look at outdoor recreation research and some underlying premises. The author focuses on the concept of culture as communication and how it influences our perception of problems and our search for solutions. Both outdoor recreation and science are viewed as subcultures that have their own bodies of mythology, making recreation problems more difficult to...

  1. Tie-breaking in games of perfect information

    DEFF Research Database (Denmark)

    Tranæs, Torben

    1998-01-01

    The paper suggests that ties in an extensive form game have strategic implications if they represent credible threats or promises. We consider a subset of subgame-perfect Nash equilibria obtained by breaking ties according to their strategic implications, and show that the subset is nonempty for ...... for finite extensive form games of perfect information....

  2. Do Index Funds' Family Ties Benefit the Firms They Own?

    NARCIS (Netherlands)

    J.A. Albuquerque de Sousa (José)

    2017-01-01

    textabstractI investigate the impact of ties between index and non-index funds within the same mutual fund family on the value of firms in which both funds invest. Theoretically, I show that family ties increase non-index funds’ incentives to purchase additional shares and monitor a firm. This is

  3. Economics of Concrete and Wood Tie Track Structures

    Science.gov (United States)

    1978-08-01

    This report presents results from an evaluation of the economic benefits of concrete- versus wood-tie track. The analysis includes the life-cycle capital, maintenance, and renewal costs for concrete- and wood-tie track for four specific test cases an...

  4. Neuronal protein gene product 9.5 (IEF SSP 6104) is expressed in cultured human MRC-5 fibroblasts of normal origin and is strongly down-regulated in their SV40 transformed counterparts

    DEFF Research Database (Denmark)

    Honoré, B; Rasmussen, H H; Vandekerckhove, J

    1991-01-01

    Neuronal protein gene product 9.5 (PGP 9.5) most likely identical to ubiquitin carboxyl-terminal hydrolase isozyme L1 (UCH-L1) has been reported to be expressed almost exclusively in neuronal and neuroendocrine tissues. By two-dimensional (2D) immunoblotting, comigration and microsequencing...... is expressed at high levels in quiescent and proliferating cultured normal fibroblasts and is strongly down-regulated (about 10 times) in their transformed counterparts. Udgivelsesdato: 1991-Mar-25...

  5. Tie2 signaling cooperates with TNF to promote the pro-inflammatory activation of human macrophages independently of macrophage functional phenotype.

    Directory of Open Access Journals (Sweden)

    Samuel García

    Full Text Available Angiopoietin (Ang -1 and -2 and their receptor Tie2 play critical roles in regulating angiogenic processes during development, homeostasis, tumorigenesis, inflammation and tissue repair. Tie2 signaling is best characterized in endothelial cells, but a subset of human and murine circulating monocytes/macrophages essential to solid tumor formation express Tie2 and display immunosuppressive properties consistent with M2 macrophage polarization. However, we have recently shown that Tie2 is strongly activated in pro-inflammatory macrophages present in rheumatoid arthritis patient synovial tissue. Here we examined the relationship between Tie2 expression and function during human macrophage polarization. Tie2 expression was observed under all polarization conditions, but was highest in IFN-γ and IL-10 -differentiated macrophages. While TNF enhanced expression of a common restricted set of genes involved in angiogenesis and inflammation in GM-CSF, IFN-γ and IL-10 -differentiated macrophages, expression of multiple chemokines and cytokines, including CXCL3, CXCL5, CXCL8, IL6, and IL12B was further augmented in the presence of Ang-1 and Ang-2, via Tie2 activation of JAK/STAT signaling. Conditioned medium from macrophages stimulated with Ang-1 or Ang-2 in combination with TNF, sustained monocyte recruitment. Our findings suggest a general role for Tie2 in cooperatively promoting the inflammatory activation of macrophages, independently of polarization conditions.

  6. cultural

    Directory of Open Access Journals (Sweden)

    Irene Kreutz

    2006-01-01

    Full Text Available Es un estudio cualitativo que adoptó como referencial teorico-motodológico la antropología y la etnografía. Presenta las experiencias vivenciadas por mujeres de una comunidad en el proceso salud-enfermedad, con el objetivo de comprender los determinantes sócio-culturales e históricos de las prácticas de prevención y tratamiento adoptados por el grupo cultural por medio de la entrevista semi-estructurada. Los temas que emergieron fueron: la relación entre la alimentación y lo proceso salud-enfermedad, las relaciones con el sistema de salud oficial y el proceso salud-enfermedad y lo sobrenatural. Los dados revelaron que los moradores de la comunidad investigada tienen un modo particular de explicar sus procedimientos terapéuticos. Consideramos que es papel de los profesionales de la salud en sus prácticas, la adopción de abordajes o enfoques que consideren al individuo en su dimensión sócio-cultural e histórica, considerando la enorme diversidad cultural en nuestro país.

  7. Cultural Integration of Migrant Citizens:<strong> strong>

    DEFF Research Database (Denmark)

    Singla, Rashmi; Akora, Lydia; Panesar, Jasbir

    2006-01-01

    om deres rettigheder og pligter - både som medborgere, som forældre og som enkeltpersoner. Projektets grundlæggende begrundelse er et empowerment perspektiv, set som processer hvorigennem underprivilegerede individer og socialgrupper forbedrer deres evne til at skabe, overskue, kontrollere og...... tidsafgrænsede projekter.   På trods af forskellige dominerende fokus i de tre lande (forældre empowerment i Danmark, forbedret jobmuligheder og entreprenørskab i UK og forbedret social tilpasning i Finland) var det fælles aspekt i projektet, at de voksne kursister kunne reflektere over deres forståelse af deres...... konferencer førte til øget empowerment og forbedret socialt ansvar ikke kun blandt kursisterne, men også blandt de professionelle. Udgivelsesdato: december...

  8. KAMG: A Tool for Converting Blood Ties and Affinity Ties into Adjacency Matrices

    Directory of Open Access Journals (Sweden)

    Hang Xiong

    2016-07-01

    Full Text Available Kinship Adjacency Matrix Generator (KAMG is a browser-based software for creating adjacency matrices using the information of kinship ties. Specifically, it is capable of converting the family trees in the format of GEDCOM files into adjacency matrices of blood relationship. With the data of intermarriages between different families, it can further create the adjacency matrix of affinity relationship for the families. The outcomes can be directly used to create networks. KAMG is written in JavaScript and implemented on web browsers. It is completely open source and the source code is publicly available on GitHub.

  9. Toxicity identification and evaluation (TIE) of a petroleum refinery wastewater.

    Science.gov (United States)

    Daflon, Sarah D A; Guerra, Igor L; Reynier, Márcia V; Cerqueira, Ana C; Botta, Clarice R; Campos, Juacyara C

    2017-07-29

    Petroleum refineries generate large amounts of wastewaters, which can have acute/chronic toxicity toward aquatic organisms. Previous studies have shown that many contaminants can be responsible for this toxicity, among them ammonia, sulfide, cyanide, phenols and hydrocarbons. In the study reported herein, the cause of the chronic toxicity of a biotreated petroleum refinery wastewater was investigated by applying the TIE methodology using the microcrustacean Ceriodaphnia dubia. Five samples were analyzed, and the results suggest that copper is the primary toxicant, showing a strong correlation with wastewater toxicity in Phase III. Other metal contaminants, such as zinc and nickel, are present in the samples at toxic concentrations and these may also contribute (to a lesser degree) toward the toxicity. In the case of one sample, the toxicity was attributed to polycyclic aromatic hydrocarbons (PAHs), possibly benzo(a)pyrene, which was present at a concentration toxic to C. dubia. Although the values for the physicochemical parameters of the samples were below Brazilian environmental regulation limits (CONAMA 430), this was not sufficient to prevent chronic toxicity toward aquatic life, indicating that these limits are relatively high.

  10. An Exploratory Examination of Social Ties and Crime in Mobile Home Communities

    Directory of Open Access Journals (Sweden)

    William P. McCarty

    2013-11-01

    Full Text Available Guided by the systemic model of social disorganization, the purpose of this study was to explore the nature of social ties in mobile home communities and examine how that relates to rates of violent and property crime. Interviews with a small sample of mobile home residents, owners, and managers in Omaha, Nebraska, indicate a wide spectrum of communities, from those characterized by an atomized population to those with strong social ties. Fear of crime, ethnically heterogeneous populations, and lax management were cited by respondents as factors that undermined relationships. Proactive management and a desire to help neighbors were cited by respondents as factors that helped strengthen relationships. Violent and property crime rates for the mobile home communities were largely consistent with the interview data, providing support for the importance of social networks and a systemic model of social disorganization. The implications of these findings for research and policy are also explored.

  11. High-speed passenger rail tie-ballast interaction.

    Science.gov (United States)

    2015-05-01

    This Research Results Report presents : evidence of poor tie support and increased : applied loads that were used to determine the : root cause of transient and permanent vertical : displacements at two Amtrak bridge transitions. : These result...

  12. DO TIE LABORATORY BASED ASSESSMENT METHODS REALLY PREDICT FIELD EFFECTS?

    Science.gov (United States)

    Sediment Toxicity Identification and Evaluation (TIE) methods have been developed for both porewaters and whole sediments. These relatively simple laboratory methods are designed to identify specific toxicants or classes of toxicants in sediments; however, the question of whethe...

  13. DO TIE LABORATORY BASED METHODS REALLY REFLECT FIELD CONDITIONS

    Science.gov (United States)

    Sediment Toxicity Identification and Evaluation (TIE) methods have been developed for both interstitial waters and whole sediments. These relatively simple laboratory methods are designed to identify specific toxicants or classes of toxicants in sediments; however, the question ...

  14. Grand Performances: Building Self and Social Ties through Theatrical Performance

    Directory of Open Access Journals (Sweden)

    Stephanie May de Montigny

    2015-05-01

    Full Text Available The stories that individuals tell about their experiences on stage and behind-the-scenes at the Grand Opera House of Oshkosh, Wisconsin, contribute to their knowledge of self and social ties.

  15. Implications of Renewing US Military Ties with Indonesia

    National Research Council Canada - National Science Library

    Gayagas, Christine

    2003-01-01

    .... However, the US cut virtually all military ties with Indonesia in 1992 in response to allegations of Indonesian military human rights violations in efforts to repress the separatist movement in East Timor...

  16. Cracking and impact performance characteristics of plastic composite ties.

    Science.gov (United States)

    2012-03-01

    As followup to a workshop on Engineered Composite Ties sponsored by the American Railway Engineering and Maintenance-of-Way Association and the Federal Railroad Administration, the Transportation Technology Center, Inc., in Pueblo, CO, conducted a se...

  17. The Strength of Weak Ties You Can Trust: The Mediating Role of Trust in Effective Knowledge Transfer

    OpenAIRE

    Daniel Z. Levin; Rob Cross

    2004-01-01

    Research has demonstrated that relationships are critical to knowledge creation and transfer, yet findings have been mixed regarding the importance of relational and structural characteristics of social capital for the receipt of tacit and explicit knowledge. We propose and test a model of two-party (dyadic) knowledge exchange, with strong support in each of the three companies surveyed. First, the link between strong ties and receipt of useful knowledge (as reported by the knowledge seeker) ...

  18. Cross-border Ties and Arab American Mental Health

    Science.gov (United States)

    Samari, Goleen

    2016-01-01

    Due to increasing discrimination and marginalization, Arab Americans are at a greater risk for mental health disorders. Social networks that include ties to the country of origin could help promote mental well-being in the face of discrimination. The role of countries of origin in immigrant mental health receives little attention compared to adjustment in destination contexts. This study addresses this gap by analyzing the relationship between nativity, cross-border ties, and psychological distress and happiness for Arab Americans living in the greater Detroit Metropolitan Area (N=896). I expect that first generation Arab Americans will have more psychological distress compared to one and half, second, and third generations, and Arab Americans with more cross-border ties will have less psychological distress and more happiness. Data come from the 2003 Detroit Arab American Study, which includes measures of nativity, cross-border ties – attitudes, social ties, media consumption, and community organizations, and the Kessler-10 scale of psychological distress and self-reported happiness. Ordered logistic regression analyses suggest that psychological distress and happiness do not vary much by nativity alone. However, cross-border ties have both adverse and protective effects on psychological distress and happiness. For all generations of Arab Americans, cross-border attitudes and social ties are associated with greater odds of psychological distress and for first generation Arab Americans, media consumption is associated with greater odds of unhappiness. In contrast, for all generations, involvement in cross-border community organizations is associated with less psychological distress and for the third generation, positive cross-border attitudes are associated with higher odds of happiness. These findings show the complex relationship between cross-border ties and psychological distress and happiness for different generations of Arab Americans. PMID:26999416

  19. Cross-border ties and Arab American mental health.

    Science.gov (United States)

    Samari, Goleen

    2016-04-01

    Due to increasing discrimination and marginalization, Arab Americans are at a greater risk for mental health disorders. Social networks that include ties to the country of origin could help promote mental well-being in the face of discrimination. The role of countries of origin in immigrant mental health receives little attention compared to adjustment in destination contexts. This study addresses this gap by analyzing the relationship between nativity, cross-border ties, and psychological distress and happiness for Arab Americans living in the greater Detroit Metropolitan Area (N = 896). I expect that first generation Arab Americans will have more psychological distress compared to one and half, second, and third generations, and Arab Americans with more cross-border ties will have less psychological distress and more happiness. Data come from the 2003 Detroit Arab American Study, which includes measures of nativity, cross-border ties--attitudes, social ties, media consumption, and community organizations, and the Kessler-10 scale of psychological distress and self-reported happiness. Ordered logistic regression analyses suggest that psychological distress and happiness do not vary much by nativity alone. However, cross-border ties have both adverse and protective effects on psychological distress and happiness. For all generations of Arab Americans, cross-border attitudes and social ties are associated with greater odds of psychological distress and for first generation Arab Americans, media consumption is associated with greater odds of unhappiness. In contrast, for all generations, involvement in cross-border community organizations is associated with less psychological distress and for the third generation, positive cross-border attitudes are associated with higher odds of happiness. These findings show the complex relationship between cross-border ties and psychological distress and happiness for different generations of Arab Americans. Copyright © 2016

  20. Building an ethical organizational culture.

    Science.gov (United States)

    Nelson, William A; Taylor, Emily; Walsh, Thom

    2014-01-01

    The success of a health care institution-as defined by delivering high-quality, high-value care, positive patient outcomes, and financial solvency-is inextricably tied to the culture within that organization. The ability to achieve and sustain alignment between its mission, values, and everyday practices defines a positive organizational culture. An institution that has a diminished organizational culture, reflected in the failure to consistently align management and clinical decisions and practices with its mission and values, will struggle. The presence of misalignment or of ethics gaps affects the quality of care being delivered, the morale of the staff, and the organization's image in the community. Transforming an organizational culture will provide a foundation for success and a framework for daily ethics-grounded operations in any organization. However, building an ethics-grounded organization is a challenging process requiring strong organization leadership and planning. Using a case study, the authors provide a multiyear, continuous step-by-step strategy consisting of identifying ethics culture gaps, establishing an ethics taskforce, clarifying and prioritizing the problems, developing strategy for change, implementing the strategy, and evaluating outcomes. This process will assist organizations in aligning its actions with its mission and values, to find success on all fronts.

  1. Resilience by solidary ties (Resiliencia por lazos de solidaridad

    Directory of Open Access Journals (Sweden)

    Antonio Alaminos

    2015-07-01

    Full Text Available This article considers an empirical approach to the relationships among three well known concepts: “Benevolence” (Schwartz, Solidarity and Resilience ("Subjective wellbeing scale" - SWB. The first concept refers to cultural values, the second one to social networks and the third to the ability to recover from crisis. The measurement of solidarity has been done from the point of view of supportive ties. The baseline hypothesis considers that the presence of a high value in Benevolence contributes to the involvements in solidarity networks. Participation in supportive relationships facilitates recovery from personal crisis. Using data from the European Social Survey (ESS6, we conclude from this structural analysis that the resilience reflected in a society is partly a consequence of the supportive networks shaped by the presence of benevolence values. | Tras introducir teóricamente los conceptos de "Benevolencia" (Schwartz, "Lazos de solidaridad" y "Resiliencia", se presenta su operativización en la Encuesta Social Europea de 2012. La hipótesis de partida plantea que la presencia de un valor alto en Benevolencia influye en la participación en interacciones solidarias y que la participación en redes solidarias facilita el recobrarse de las crisis. A partir de estos datos, y considerando varias sociedades europeas, se han testado dos modelos alternativos, según el efecto de la Benevolencia y los lazos de solidaridad sobre la resiliencia. Se concluye que existe un efecto directo de los valores de Benevolencia sobre la Solidaridad, y de esta sobre la Resiliencia. La influencia de los valores de Benevolencia sobre la Resiliencia se establece de forma indirecta mediante la activación de relaciones solidarias.

  2. Localization of the angiopoietin receptors Tie-1 and Tie-2 on the primary cilia in the female reproductive organs

    DEFF Research Database (Denmark)

    Teilmann, Stefan C; Christensen, Søren T

    2005-01-01

    Blood vessel homeostasis and endothelial cell survival depend on proper signalling through angiopoietin receptors such as the receptor tyrosine kinases Tie-1 and Tie-2. We have studied the presence and subcellular localization of these receptors in murine female reproductive organs using confocal...... organs play a novel and important sensory role in relaying physiochemical changes from the extracellular environment to epithelial cells of the oviduct, the ovary and extra-ovarian tissues....

  3. Tongue tie division in infants with breast feeding difficulties.

    Science.gov (United States)

    Wallace, Helen; Clarke, Susan

    2006-07-01

    Tongue tie is a congenital oral abnormality characterised by an abnormally short lingual frenulum. The majority of current medical and surgical opinion is that tongue tie rarely, if ever, causes feeding difficulties and therefore, should not be divided. With increased popularity of breast feeding in the last decade there has been renewed interest in tongue tie and its effect on breast feeding. We present a case series of infants who underwent tongue tie division for feeding difficulties and assess the indications for and outcomes of the procedure. Eleven infants with breast feeding difficulties associated with tongue tie underwent tongue tie division using a standard technique in the outpatient clinic. No anaesthetic or analgesia was used and there was little or no bleeding or infant distress. Parents were subsequently contacted by phone at least 4 months after the procedure to inquire about the effect of the procedure on feeding and any complications encountered. The age at tongue tie division ranged from 2 to 31 days (median=10 days). 10/11 of these infants were followed up. The age at follow up was 4-20 months (median=10 months). Prior to division, all mothers had attempted breast feeding and were keen to continue. 9/10 had experienced difficulties due to poor latch (8/10), sore nipples (6/10) and continual feeding cycle (5/10). Only 3/10 mothers were breast feeding exclusively. Following tongue tie division, an improvement in breast feeding was noticed immediately by 4/10 mothers. Three mothers did not notice any improvement. 6/10 mothers successfully breast fed for at least 4 months. There were no reported complications of the procedure. The benefits of breast feeding are well known and lactation consultants are becoming more aware of tongue tie as a treatable cause of breast feeding difficulty. The procedure is quick and simple, not requiring any analgesia or anaesthesia and can be performed in the outpatient clinic. Although not conclusive, this case series

  4. The development of a tongue assessment tool to assist with tongue-tie identification.

    Science.gov (United States)

    Ingram, Jenny; Johnson, Debbie; Copeland, Marion; Churchill, Cathy; Taylor, Hazel; Emond, Alan

    2015-07-01

    To produce a simple tool with good transferability to provide a consistent assessment of tongue appearance and function in infants with tongue-tie. The Bristol Tongue Assessment Tool (BTAT) was developed based on clinical practice and with reference to the Hazelbaker Assessment Tool for Lingual Frenulum Function (ATLFF). This paper documents 224 tongue assessments using the BTAT. There were 126 tongue assessments recorded using the BTAT and ATLFF tools to facilitate comparisons between them. Paired BTAT assessments were obtained from eight midwives who were using the new assessment tool. There was acceptable internal reliability for the four-item BTAT (Cronbach's α=0.708) and the eight midwives who used it showed good correlation in the consistency of its use (ICC=0.760). The BTAT showed a strong and significant correlation (0.89) with the ATLFF, indicating that the simpler BTAT could be used in place of the more detailed assessment tool to score the extent of a tongue-tie. Midwives found it quick and easy to use and felt that it would be easy to teach to others. The BTAT provides an objective, clear and simple measure of the severity of a tongue-tie, to inform selection of infants for frenotomy and to monitor the effect of the procedure. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  5. Structure, date and sources of Hikayat Aceh revisited: The problem of Mughal-Malay literary ties

    Directory of Open Access Journals (Sweden)

    Vladimir Braginsky

    2008-12-01

    Full Text Available It is common knowledge that from the early centuries AD to the nineteenth century India remained an important source of inspiration for creators of traditional Malay culture and Malay men of letters. However, if literary ties between Hindu India and the Malay world, both direct and mediated by Javanese literature, have frequently drawn the attention of researchers, creative stimuli that came to the Malays from Muslim India remain inadequately studied. Yet the role of these stimuli, radiating from major centres of the Muslim, Persianate, India such as Bengal, Gujarat, Deccan, and the Coromandel coast, in the development of Malay literary culture was by no means inferior to the inspiration originating from Hindu India. In this context, cultural and literary contacts of the Sultanate of Aceh with the Mughal Empire in the seventeenth century are a particularly interesting and challenging subject.

  6. The Spontaneous Combustion of Railway Ties and Asphalt Shingles

    Science.gov (United States)

    Leslie, Geoffrey

    Many Low Carbon Fuels (LCFs) present unknown spontaneous combustion risks, which must be quantified before their use as fossil fuel replacements. Wood and coal spontaneous combustion is well understood; however, LCFs weather, and subsequent chemical changes could affect their spontaneous combustion properties. LCF spontaneous combustion could lead to accidental fires with possible loss of life, limb and property. The spontaneous combustion risks of two LCFs, discarded creosote-treated wooden railway ties and roofing asphalt shingles, were investigated with calorimetry and heat transfer experiments. Chemical changes due to weathering were studied with pyrolysis-Gas Chromatography/Mass Spectrometry (py-GC/MS). Creosote-treated wooden railway tie dust, roofing asphalt shingle particles, poplar wood pellets, and petroleum coke self-heating were studied with isothermal calorimetry. Railway tie dust and asphalt shingle heat transfer were characterized with a guarded hot plate. Petroleum coke self-heating was consistent with coal, while both poplar pellets and railway tie dust were found to be more reactive compared to oven test results of similar materials. The observed increase in reactivity was probably a result of significant moisture contenint in the pellet and railway tie dust. Critical conditions for spontaneous combustion were evaluated with the Frank-Kamenetskii parameter, assuming an ambient temperature of 40°C and constant moisture content. Kamenetskii calculations indicate that a 1.6 m cube of railway tie dust, or a 58 m cube of asphalt particles, would be unstable and combust. LCF chemistry may have been affected by weathering, which would cause chemical changes that affect their spontaneous combustion properties. Therefore, railway tie wood and roofing asphalt shingle chemistry were investigated by identifying products of 250° and 550°C pyrolysis with py-GC/MS. Railway tie wood pyrolyzates did not show signs of weathering; in contrast, asphalt pyrolysis

  7. Novel thienopyrimidine and thiazolopyrimidine kinase inhibitors with activity against Tie-2 in vitro and in vivo.

    Science.gov (United States)

    Luke, Richard W A; Ballard, Peter; Buttar, David; Campbell, Leonie; Curwen, Jon; Emery, Steve C; Griffen, Alison M; Hassall, Lorraine; Hayter, Barry R; Jones, Cliff D; McCoull, William; Mellor, Martine; Swain, Mike L; Tucker, Julie A

    2009-12-01

    The SAR and improvement in potency against Tie2 of novel thienopyrimidine and thiazolopyrimidine kinase inhibitors are reported. The crystal structure of one of these compounds bound to the Tie-2 kinase domain is consistent with the SAR. These compounds have moderate potency in cellular assays of Tie-2 inhibition, good physical properties, DMPK, and show evidence of in vivo inhibition of Tie-2.

  8. 78 FR 75545 - Prestressed Concrete Steel Rail Tie Wire From the People's Republic of China: Preliminary...

    Science.gov (United States)

    2013-12-12

    ... DEPARTMENT OF COMMERCE International Trade Administration [A-570-990] Prestressed Concrete Steel... (``Department'') preliminarily determines that prestressed concrete steel rail tie wire (``PC tie wire'') from... prestressed tendons in concrete railroad ties (``PC tie wire''). High carbon steel is defined as steel that...

  9. Improving breastfeeding outcomes: the impact of tongue-tie.

    Science.gov (United States)

    Jackson, Rosemary

    2012-06-01

    A tongue-tie (ankyloglossia) is defined as a lingual frenulum that is short, tight and restricts normal tongue movement. The tongue-tied newborn baby then has a mechanical difficulty attaching to his mum's breast and maintaining attachment to feed effectively. In the hands of skilled carers, this mechanical problem can be resolved by releasing the frenulum (frenulotomy) and the baby's access to his/her mother's breast milk be preserved. Published research on this subject has undergone justifiable criticism. Robust methodology was lacking in earlier studies. An overview of the course of researchers' response to critique is discussed. The care pathway in place in mid-Norfolk for mother and baby dyads where the baby's tongue-tie compromises efficient breastfeeding is outlined.

  10. Tongue-tie and breastfeeding: a review of the literature.

    Science.gov (United States)

    Edmunds, Janet; Miles, Sandra C; Fulbrook, Paul

    2011-03-01

    In Australia, initial exclusive breastfeeding rates are 80%, reducing to 14% at 6 months. One factor that contributes to early breastfeeding cessation is infant tongue-tie, a congenital abnormality occurring in 2.8-10.7% of infants, in which a thickened, tightened or shortened frenulum is present. Tongue-tie is linked to breastfeeding difficulties, speech and dental problems. It may prevent the baby from taking enough breast tissue into its mouth to form a teat and the mother may experience painful, bleeding nipples and frequent feeding with poor infant weight gain; these problems may contribute to early breastfeeding cessation. This review of research literature analyses the evidence regarding tongue-tie to determine if appropriate intervention can reduce its impact on breastfeeding cessation, concluding that, for most infants, frenotomy offers the best chance of improved and continued breastfeeding. Furthermore, studies have demonstrated that the procedure does not lead to complications for the infant or mother.

  11. Social ties and risk for cancer - a prospective cohort study

    DEFF Research Database (Denmark)

    Bergelt, Corinna; Prescott, Eva; Grønbaek, Morten

    2009-01-01

    BACKGROUND: Poor social support and small social networks have been associated with increased risks for conditions such as coronary heart disease as well as with overall mortality. We investigated the association between social ties and risk for cancer. MATERIAL AND METHODS: The study sample...... consisted of 8 548 Danes who had been examined in 1991-1994 within the Copenhagen City Heart Study. The median length of follow-up was 9.3 years (range, 0-11.2 years). Social ties were measured from answers to a questionnaire on social networks. Regression analyses for cancers at the most frequent sites...... (breast, lung, prostate and colon and rectum) were conducted with the Cox proportional hazards model, with adjustment for a number of well-known risk factors for cancer. RESULTS: While we found no significant association between social ties and risk for cancer in men, women with high social network scores...

  12. Social ties and risk for cancer - a prospective cohort study

    DEFF Research Database (Denmark)

    Bergelt, C.; Prescott, E.; Gronbaek, M.

    2009-01-01

    Background. Poor social support and small social networks have been associated with increased risks for conditions such as coronary heart disease as well as with overall mortality. We investigated the association between social ties and risk for cancer. Material and methods. The study sample...... consisted of 8 548 Danes who had been examined in 1991-1994 within the Copenhagen City Heart Study. The median length of follow-up was 9.3 years (range, 0-11.2 years). Social ties were measured from answers to a questionnaire on social networks. Regression analyses for cancers at the most frequent sites...... (breast, lung, prostate and colon and rectum) were conducted with the Cox proportional hazards model, with adjustment for a number of well-known risk factors for cancer. Results. While we found no significant association between social ties and risk for cancer in men, women with high social network scores...

  13. Role Markers of Adulthood and Young Adults’ Ties to Grandparents

    Science.gov (United States)

    Monserud, Maria A.

    2010-01-01

    This study investigates the implications of residential independence, enrollment in postsecondary education, employment, marital status, and parenthood for contact with, and closeness to, grandparents. Data come from 1,507 young adults interviewed in Wave 3 of the National Survey of Families and Households. Findings suggest that adult roles can be either negatively or positively associated with grandparent-grandchild ties, depending on specific configurations among such factors as the adult role in question, a particular dimension of intergenerational solidarity, lineage, and grandchild’s and grandparent’s gender. Young adults’ ties to parents can mediate the adverse consequences of residential independence for contact with grandparents. PMID:20725597

  14. Reciprocity, social ties, and competition in markets for experience goods

    DEFF Research Database (Denmark)

    Huck, Steffen; Tyran, Jean-Robert

    2007-01-01

    Reciprocal customers may disproportionately improve the performance of markets for experience goods. Reciprocal customers reward (punish) firms for providing good (bad) quality by upholding (terminating) the customer relation. This may induce firms to provide good quality which, in turn, may induce...... a positive externality for non-reciprocal customers who would, in the absence of reciprocal types, face market breakdown. This efficiency-enhancing effect of reciprocity is boosted when there are social ties between consumers and competition between firms. The existence of social ties or competition alone...

  15. Subsea Tie-in, design solutions and optimisation methods

    OpenAIRE

    Andersen, Loyd Kjetil H.

    2015-01-01

    Master's thesis in Mechanical engineering Subsea Tie-in Systems is used to connect pipes between subsea structures in the offshore oil and gas industry. Subsea Tie-in system has been developed for many decades by the industry, and is used throughout the world in many subsea oil and gas fields of today. Industry experience and various piping codes have been developed and used in the design over the years. However there has been a lack of recommended standard practice and guideline for desig...

  16. Application of Bow-tie methodology to improve patient safety.

    Science.gov (United States)

    Abdi, Zhaleh; Ravaghi, Hamid; Abbasi, Mohsen; Delgoshaei, Bahram; Esfandiari, Somayeh

    2016-05-09

    Purpose - The purpose of this paper is to apply Bow-tie methodology, a proactive risk assessment technique based on systemic approach, for prospective analysis of the risks threatening patient safety in intensive care unit (ICU). Design/methodology/approach - Bow-tie methodology was used to manage clinical risks threatening patient safety by a multidisciplinary team in the ICU. The Bow-tie analysis was conducted on incidents related to high-alert medications, ventilator associated pneumonia, catheter-related blood stream infection, urinary tract infection, and unwanted extubation. Findings - In total, 48 potential adverse events were analysed. The causal factors were identified and classified into relevant categories. The number and effectiveness of existing preventive and protective barriers were examined for each potential adverse event. The adverse events were evaluated according to the risk criteria and a set of interventions were proposed with the aim of improving the existing barriers or implementing new barriers. A number of recommendations were implemented in the ICU, while considering their feasibility. Originality/value - The application of Bow-tie methodology led to practical recommendations to eliminate or control the hazards identified. It also contributed to better understanding of hazard prevention and protection required for safe operations in clinical settings.

  17. Knotcraft the practical and entertaining art of tying knots

    CERN Document Server

    Macfarlan, Allan and Paulette

    1983-01-01

    Comprehensive reference work explains how to tie hundreds of practical (and decorative) knots in clear illustrations and precisely worded written instructions. Ideal for boaters and campers. Also covers knots in history, knot mystery and magic, and games, stunts and tricks with rope. Introduction. Index. 166 black-and-white illustrations.

  18. Contextualizing dyadic ties, social capital and Ubuntu as ...

    African Journals Online (AJOL)

    This article does not oppose the idea of the presence of hostility in the relationships between these two groups, however, it argues that using the xenophobic brush to paint these ties as a monochrome does not provide a holistic picture of a complex nature of relationships that exist beyond xenophobia. Critical questions ...

  19. Teaching Tongue-Tied Students: Ankyloglossia in the Instrumental Classroom

    Science.gov (United States)

    Dovel, Jason

    2010-01-01

    Ankyloglossia is a significant medical condition that has not been adequately addressed in music education literature. While practically every instructor will have students who struggle with ankyloglossia, many teachers are entirely unaware of this condition's various symptoms and treatments. Ankyloglossia, more commonly known as tongue-tie, is a…

  20. Neural correlates of dynamically evolving interpersonal ties predict prosocial behaviour

    Directory of Open Access Journals (Sweden)

    Johannes Jacobus Fahrenfort

    2012-03-01

    Full Text Available There is a growing interest for the determinants of human choice behaviour in social settings. Upon initial contact, investment choices in social settings can be inherently risky, as the degree to which the other person will reciprocate is unknown. Nevertheless, people have been shown to exhibit prosocial behaviour even in one-shot laboratory settings where all interaction has been taken away. A logical step has been to link such behaviour to trait empathy-related neurobiological networks. However, as a social interaction unfolds, the degree of uncertainty with respect to the expected payoff of choice behaviour may change as a function of the interaction. Here we attempt to capture this factor. We show that the interpersonal tie one develops with another person during interaction - rather than trait empathy - motivates investment in a public good that is shared with an anonymous interaction partner. We examined how individual differences in trait empathy and interpersonal ties modulate neural responses to imposed monetary sharing. After, but not before interaction in a public good game, sharing prompted activation of neural systems associated with reward (striatum, empathy (anterior insular cortex [AIC] and anterior cingulate cortex [ACC] as well as altruism and social significance (posterior superior temporal sulcus [pSTS]. Although these activations could be linked to both empathy and interpersonal ties, only tie-related pSTS activation predicted prosocial behaviour during subsequent interaction, suggesting a neural substrate for keeping track of social relevance.

  1. The Ties That Bind Exhibition Science Bringing Nations Together

    CERN Multimedia

    1997-01-01

    Scientific ties between JINR and CERN date back to 1957, when JINR Vice-Director Marian Danysz, a Polish professor, visited CERN and agreed with CERN Director-General C.J. Bakker on the exchange of scientists and on joint experiments. Since that time to progress and now JINR takes an active part in the Large Hadron Collider, LHC, project at CERN.

  2. Measurement of the location of tie-bar shoulders

    CERN Multimedia

    Hubert Gerwig

    2001-01-01

    The inner vactank is machined on a length of 13m at the location of the rails for HCAL. in addition at one side the inner vactank has shoulders to lodge the M48 tie-bars that will guarantee the fixation to the swivelling platform actually produced at HANJUNG Company in South Korea

  3. Explaining Teen Childbearing and Cohabitation: Community Embeddedness and Primary Ties

    Science.gov (United States)

    Houseknecht, Sharon K.; Lewis, Susan K.

    2005-01-01

    This investigation examines whether access to social capital reduces the chance that teens will cohabit or have a nonmaritally conceived birth. Using data from a nationally representative panel study of eighth-grade girls and their parents, we hypothesize that girls who have (and whose families have) dense community ties as well as greater access…

  4. Neural Correlates of Dynamically Evolving Interpersonal Ties Predict Prosocial Behavior

    Science.gov (United States)

    Fahrenfort, Johannes J.; van Winden, Frans; Pelloux, Benjamin; Stallen, Mirre; Ridderinkhof, K. Richard

    2011-01-01

    There is a growing interest for the determinants of human choice behavior in social settings. Upon initial contact, investment choices in social settings can be inherently risky, as the degree to which the other person will reciprocate is unknown. Nevertheless, people have been shown to exhibit prosocial behavior even in one-shot laboratory settings where all interaction has been taken away. A logical step has been to link such behavior to trait empathy-related neurobiological networks. However, as a social interaction unfolds, the degree of uncertainty with respect to the expected payoff of choice behavior may change as a function of the interaction. Here we attempt to capture this factor. We show that the interpersonal tie one develops with another person during interaction – rather than trait empathy – motivates investment in a public good that is shared with an anonymous interaction partner. We examined how individual differences in trait empathy and interpersonal ties modulate neural responses to imposed monetary sharing. After, but not before interaction in a public good game, sharing prompted activation of neural systems associated with reward (striatum), empathy (anterior insular cortex and anterior cingulate cortex) as well as altruism, and social significance [posterior superior temporal sulcus (pSTS)]. Although these activations could be linked to both empathy and interpersonal ties, only tie-related pSTS activation predicted prosocial behavior during subsequent interaction, suggesting a neural substrate for keeping track of social relevance. PMID:22403524

  5. Macrophage colony-stimulating factor augments Tie2-expressing monocyte differentiation, angiogenic function, and recruitment in a mouse model of breast cancer.

    Directory of Open Access Journals (Sweden)

    Mary A Forget

    Full Text Available Reports demonstrate the role of M-CSF (CSF1 in tumor progression in mouse models as well as the prognostic value of macrophage numbers in breast cancer patients. Recently, a subset of CD14+ monocytes expressing the Tie2 receptor, once thought to be predominantly expressed on endothelial cells, has been characterized. We hypothesized that increased levels of CSF1 in breast tumors can regulate differentiation of Tie2- monocytes to a Tie2+ phenotype. We treated CD14+ human monocytes with CSF1 and found a significant increase in CD14+/Tie2+ positivity. To understand if CSF1-induced Tie2 expression on these cells improved their migratory ability, we pre-treated CD14+ monocytes with CSF1 and used Boyden chemotaxis chambers to observe enhanced response to angiopoietin-2 (ANG2, the chemotactic ligand for the Tie2 receptor. We found that CSF1 pre-treatment significantly augmented chemotaxis and that Tie2 receptor upregulation was responsible as siRNA targeting Tie2 receptor abrogated this effect. To understand any augmented angiogenic effect produced by treating these cells with CSF1, we cultured human umbilical vein endothelial cells (HUVECs with conditioned supernatants from CSF1-pre-treated CD14+ monocytes for a tube formation assay. While supernatants from CSF1-pre-treated TEMs increased HUVEC branching, a neutralizing antibody against the CSF1R abrogated this activity, as did siRNA against the Tie2 receptor. To test our hypothesis in vivo, we treated PyMT tumor-bearing mice with CSF1 and observed an expansion in the TEM population relative to total F4/80+ cells, which resulted in increased angiogenesis. Investigation into the mechanism of Tie2 receptor upregulation on CD14+ monocytes by CSF1 revealed a synergistic contribution from the PI3 kinase and HIF pathways as the PI3 kinase inhibitor LY294002, as well as HIF-1α-deficient macrophages differentiated from the bone marrow of HIF-1αfl/fl/LysMcre mice, diminished CSF1-stimulated Tie2 receptor

  6. "You Cannot Talk with All of the Strangers in a Pub": A Longitudinal Case Study of International Postgraduate Students' Social Ties at a British University

    Science.gov (United States)

    Schartner, Alina

    2015-01-01

    The formation of social ties is a major factor in the international student experience (Ramsay et al. in High Educ 54(2):247-265, 2007), influencing student wellbeing and adjustment to the new academic and sociocultural environment (Ward et al. in The psychology of culture shock. Routledge, Hove, 2001). Although a significant body of research in…

  7. <strong>Neuroeconomics and Human Resource Developmentstrong>/>

    DEFF Research Database (Denmark)

    Larsen, Torben

    2009-01-01

    threats and personal stress. So far, the evidence-based findings on human resource development (HRD) seem not to match these huge challenges. The aim of this study is to identify cost-effective means of mental training to recover sufficiently from the present bias to enable more sustainable decisions...... making as required to meet the global challenges in study as confirmed by an intercultural neuroeconomic comparative study between Asian and Western cultures. However, a cultural barrier in the Western cultural tradition against meditative introversion has to be overcome to improve the time horizon...... meditation, Harvard relaxation procedure, ACEM meditation and Autogenic training. IV. Broad health effects of regular medical meditation are evidenced by RCT and even reviews/meta-analysis in more medical meditation settings: Recovery from basal anxiety Stabilization of plasma cortisol Independence...

  8. Absent bow-tie sign in knee MRI

    International Nuclear Information System (INIS)

    Lee, Young Uk; Park, Jun Yong; Chung, Eun Chul; Youn, Eun Kyung; Lee, Chang Seok; Ji, Jun Ha; Lee, Kwang Chul

    2000-01-01

    'Absent bow-tie sign' is interpreted as positive when a bow-tie-shaped body segment is seen on only one or no slice of 4- or 5-mm thick sagittal images, and is a well known as a useful sign in diagnosing bucket-handle meniscal tears. In practice, however, we have found that this sign was also positive in certain cases other than bucket-handle tears. We have assumed that if the normal range of meniscal body width, as determined among westerners, is transferred to the Korean population without verification and modification this might lead to misdiagnosis. The purpose of this study, therefore, is to examination the reliability of the 'absent bow-tie sign'. Among 454 cases in which knee MRI had been performed, we retrospectively evaluated 862 menisci, the total remaining after cases of discoid meniscus or those involving previous meniscectomy had been excluded. Among the 862 menisci, 614 were normal, 97 showed degeneration, 43 showed bucket-handle tearing, and 108 showed tears other than bucket-handle tear. In all cases, proton-density and T2-weighted images were obtained in both sagittal and coronal planes, with 3mm section thickness and 1mm gap. We recorded the number of sagittal images in which the body segment of each meniscus had a bow-tie appearance, and measured the width of each meniscal body, as seen on midcoronal images. In all cases but one of bucket-handle tears (97.7%), the bow-tie sign was absent, as it was in 73.2% of non-bucket-handle tears, 35.0% of degenerated menisci and 27.5% of normal menisci. Among the non-tear group, 56.4% of menisci in the female group and 27.1% in the male group had bodies less than 9mm wide. In the diagnosis of bucket-handle tears, the 'absent bow-tie sign' is a very sensitive indicator. It is nonspecific, however, and merely suggests some significant deficiency in the meniscus body or small menisci, so can be positive in other cases. Thus the interpreter should be aware of the characteristics of this sign especially when used

  9. Absent bow-tie sign in knee MRI

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Young Uk; Park, Jun Yong; Chung, Eun Chul; Youn, Eun Kyung; Lee, Chang Seok; Ji, Jun Ha; Lee, Kwang Chul [School of Medicine, Sunkyunkwan University, Seoul (Korea, Republic of)

    2000-01-01

    'Absent bow-tie sign' is interpreted as positive when a bow-tie-shaped body segment is seen on only one or no slice of 4- or 5-mm thick sagittal images, and is a well known as a useful sign in diagnosing bucket-handle meniscal tears. In practice, however, we have found that this sign was also positive in certain cases other than bucket-handle tears. We have assumed that if the normal range of meniscal body width, as determined among westerners, is transferred to the Korean population without verification and modification this might lead to misdiagnosis. The purpose of this study, therefore, is to examination the reliability of the 'absent bow-tie sign'. Among 454 cases in which knee MRI had been performed, we retrospectively evaluated 862 menisci, the total remaining after cases of discoid meniscus or those involving previous meniscectomy had been excluded. Among the 862 menisci, 614 were normal, 97 showed degeneration, 43 showed bucket-handle tearing, and 108 showed tears other than bucket-handle tear. In all cases, proton-density and T2-weighted images were obtained in both sagittal and coronal planes, with 3mm section thickness and 1mm gap. We recorded the number of sagittal images in which the body segment of each meniscus had a bow-tie appearance, and measured the width of each meniscal body, as seen on midcoronal images. In all cases but one of bucket-handle tears (97.7%), the bow-tie sign was absent, as it was in 73.2% of non-bucket-handle tears, 35.0% of degenerated menisci and 27.5% of normal menisci. Among the non-tear group, 56.4% of menisci in the female group and 27.1% in the male group had bodies less than 9mm wide. In the diagnosis of bucket-handle tears, the 'absent bow-tie sign' is a very sensitive indicator. It is nonspecific, however, and merely suggests some significant deficiency in the meniscus body or small menisci, so can be positive in other cases. Thus the interpreter should be aware of the characteristics of

  10. Four- year thyroidectomy procedures: Ligasure Vs. clamp & tie

    Directory of Open Access Journals (Sweden)

    Pazoki AR

    2010-01-01

    Full Text Available "n Normal 0 false false false EN-US X-NONE AR-SA MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:Arial; mso-bidi-theme-font:minor-bidi;} Background: The electrothermal bipolar vessel sealing system is an adjunct to the hemostatic technique, which has been successfully used in many abdominal operation, recently made available to thyroid surgery. The purpose of this was compare the outcomes of new hemostatic technique with traditional method of clamp and tie."n"nMethods: In this retrospective cross-sectional study has been done in surgery's wards of Milad & Rasul- Akram hospitals in Tehran, Iran. During three- year period between 2005-2008 all patients with different kind of pathology that need operation were assessed. Time duration of surgery and hospital stay and post surgery complication in two group, ligasure (n=45 and clamp & tie (n=145 were compared with each others."n"nResults: No difference was seen between two groups in time duration of surgery. Significant difference was seen in hospital stay and complications of surgery. Time of operation in Ligasure group was 132/22 minute and in clamp and tie group was 130/10 minute. There was found significant difference in duration of hospital stay and postoperative complication. Hypocalcemia were seen in two and 24 cases in Ligasure and Clamp & Tie group, respectively (p<0.05. Hospital stay was 2

  11. How Social Ties Influence Consumer: Evidence from Event-Related Potentials.

    Directory of Open Access Journals (Sweden)

    Jing Luan

    Full Text Available A considerable amount of marketing research has reported that consumers are more saliently influenced by friends (strong social ties than by acquaintances and strangers (weak social ties. To shed light on the neural and psychological processes underlying such phenomenon, in this study we designed an amended S1-S2 paradigm (product-[reviewer-review] that is based on realistic consumer purchase experiences. After incoming all given information (product, reviewer, review, participants were required to state their purchase intentions. The neurocognitive and emotional processes related to friend and stranger stimuli were delineated to suggest how social ties influence consumers during their shopping processes. Larger P2 (fronto-central scalp areas and P3 (central and posterior-parietal scalp areas components under stranger condition were elicited successfully. These findings demonstrate that the cognitive and emotional processing of friend and stranger stimuli occurs at stages of neural activity, and can be indicated by the P2 and P3 components. Electrophysiological data also support the hypothesis that different neural and emotional processing magnitude and strength underlie friend and stranger effect in the context of consumer purchase. During this process, the perception of stimuli evoked P2, subsequently emotional processing and attention modulation were activated and indicated by P2 and P3. The friend dominated phenomenon can be interpreted as the result of distinctive neurocognitive and emotional processing magnitude, which suggests that psychological and emotional factors can guide consumer decision making. This study consolidates that event related potential (ERP methodology is likely to be a more sensitive method for investigating consumer behaviors. From the perspectives of management and marketing, our findings show that the P2 and P3 components can be employed as an indicator to probe the influential factors of consumer purchase

  12. How Social Ties Influence Consumer: Evidence from Event-Related Potentials.

    Science.gov (United States)

    Luan, Jing; Yao, Zhong; Bai, Yan

    2017-01-01

    A considerable amount of marketing research has reported that consumers are more saliently influenced by friends (strong social ties) than by acquaintances and strangers (weak social ties). To shed light on the neural and psychological processes underlying such phenomenon, in this study we designed an amended S1-S2 paradigm (product-[reviewer-review]) that is based on realistic consumer purchase experiences. After incoming all given information (product, reviewer, review), participants were required to state their purchase intentions. The neurocognitive and emotional processes related to friend and stranger stimuli were delineated to suggest how social ties influence consumers during their shopping processes. Larger P2 (fronto-central scalp areas) and P3 (central and posterior-parietal scalp areas) components under stranger condition were elicited successfully. These findings demonstrate that the cognitive and emotional processing of friend and stranger stimuli occurs at stages of neural activity, and can be indicated by the P2 and P3 components. Electrophysiological data also support the hypothesis that different neural and emotional processing magnitude and strength underlie friend and stranger effect in the context of consumer purchase. During this process, the perception of stimuli evoked P2, subsequently emotional processing and attention modulation were activated and indicated by P2 and P3. The friend dominated phenomenon can be interpreted as the result of distinctive neurocognitive and emotional processing magnitude, which suggests that psychological and emotional factors can guide consumer decision making. This study consolidates that event related potential (ERP) methodology is likely to be a more sensitive method for investigating consumer behaviors. From the perspectives of management and marketing, our findings show that the P2 and P3 components can be employed as an indicator to probe the influential factors of consumer purchase intentions.

  13. Impact of weak social ties and networks on poor sleep quality: A case study of Iranian employees.

    Science.gov (United States)

    Masoudnia, Ebrahim

    2015-12-01

    The poor sleep quality is one of the major risk factors of somatic, psychiatric and social disorders and conditions as well as the major predictors of quality of employees' performance. The previous studies in Iran had neglected the impacts of social factors including social networks and ties on adults sleep quality. Thus, the aim of the current research was to determine the relationship between social networks and adult employees' sleep quality. This study was conducted with a correlational and descriptive design. Data were collected from 360 participants (183 males and 177 females) who were employed in Yazd public organizations in June and July of 2014. These samples were selected based on random sampling method. In addition, the measuring tools were the Pittsburgh Sleep Quality Index (PSQI) and Social Relations Inventory (SRI). Based on the results, the prevalence rate of sleep disorder among Iranian adult employees was 63.1% (total PSQI>5). And, after controlling for socio-demographic variables, there was significant difference between individuals with strong and poor social network and ties in terms of overall sleep quality (psocial network and ties had better overall sleep quality, had the most habitual sleep efficiency, and less daytime dysfunction than employees with poor social network and ties. It can be implied that the weak social network and ties serve as a risk factor for sleep disorders or poor sleep quality for adult employees. Therefore, the social and behavioral interventions seem essential to improve the adult's quality sleep. Copyright © 2015 Elsevier B.V. All rights reserved.

  14. Tongue-tie, breastfeeding difficulties and the role of Frenotomy.

    Science.gov (United States)

    Kumar, Manoj; Kalke, Erica

    2012-07-01

    A greater emphasis on exclusive breastfeeding in recent years has re-ignited the historical debate over the role of ankyloglossia (tongue-tie) in infants with breastfeeding difficulties. Several prospective cohort studies and randomized control trials have been published in this area in the last 10-15 years. We critically evaluated recent evidence and attempted to answer two important clinical queries in this area, that is, (i) whether ankyloglossia is associated with breastfeeding difficulties and (ii) whether frenotomy helps mother-baby dyad in such setting? Neonates with tongue-tie are at increased risk for breastfeeding difficulties. An early recognition of this association by primary care provider and prompt referral to a lactation consultant is important. In cases with clearly documented breastfeeding difficulties, frenotomy often results in rapid improvement in symptoms. © 2012 The Author(s)/Acta Paediatrica © 2012 Foundation Acta Paediatrica.

  15. Mobile phones, social ties, and collective action mobilization in China

    DEFF Research Database (Denmark)

    Liu, Jun

    2017-01-01

    To provide a better understanding of mobile phones as a recruitment tool in collective actions, this study explores the use of mobile phones for mobilizing protest in China. Using in-depth interviews and investigating four cases in which Chinese people employed mobile devices to recruit...... participants for protests, this study observes that mobile communication in China embodies guanxi, the indigenous social tie in Chinese society that introduces reciprocity as an influential facilitator of collective actions. The embedment of reciprocity facilitates the proliferation of mobilizing calls......, legitimizes mobilizing appeals, generates obligations and consolidates solidarity for collective actions. The study concludes with a consideration of the relevance of mobile phones for the embedment of reciprocity in social ties in the mobilization of collective action in authoritarian regimes such as China....

  16. Personal Ties in the Writing of a Doctoral Dissertation

    Directory of Open Access Journals (Sweden)

    Laura Colombo

    2014-07-01

    Full Text Available The problem of low graduation rates at the graduate level has been linked to the challenges of dissertation work. Given that this is a process of “disciplinary enculturation”, where graduate students acquire the ways of being and doing of each discipline, the social relations of doctoral candidates should be analyzed. Several studies have explored the support provided by social ties within academia but have, nevertheless, ignored other spheres. This qualitative study, based on in-depth interviews, explores the personal-sphere social relations in the dissertation writing process from the point of view of doctoral candidates and recent graduates in the fields of Education and Linguistics. Results indicate that the emotional, financial, economic, and academic support offered by these social ties is a necessary, although not in itself, sufficient condition. Some strategies for increasing institutional support to facilitate the process of writing a dissertation are offered.

  17. Linkage of genomic biomarkers to whole organism endpoints in a Toxicity Identification Evaluation (TIE).

    Science.gov (United States)

    Aquatic organisms are exposed to many toxic chemicals and interpreting the cause and effect relationships between occurrence and impairment is difficult. Toxicity Identification Evaluation (TIE) provides a systematic approach for identifying responsible toxicants. TIE relies on ...

  18. The ties between natural gas and oil prices

    International Nuclear Information System (INIS)

    Maisonnier, G.

    2006-01-01

    On the European continent, the price of natural gas is still tied directly and to a great extent to the price of competing energies, especially heavy fuel oil and home heating oil. In other words, the gas market is linked to the oil market. Under the effect of deregulation, this model is likely to change in the future, making a shift like that which took place on the American market in the past. (author)

  19. Effects of gender and tie strength on Twitter interactions

    OpenAIRE

    Kivran-Swaine, Funda; Brody, Samuel; Naaman, Mor

    2013-01-01

    We examine the connection between language, gender, and social relationships, as manifested through communication patterns in social media. Building on an analysis of 78,000 Twitter messages exchanged between 1,753 gender-coded couples, we quantitatively study how the gender composition of conversing users influences the linguistic style apparent in the messages. Using Twitter data, we also model and control for the strength of ties between conversing users. Our findings show that, in line wi...

  20. Managerial ties, market orientation, and export performance : Chinese firms experience.

    OpenAIRE

    Yan, H.; He, X.; Cheng, B.

    2017-01-01

    Managerial ties (MT) are important for business performance by providing firms access to valuable resources and protecting them from opportunism. Drawing on the resource-based view and the market orientation (MO) literature, we argue that (1) MT can help exporting firms to enhance export performance; and (2) MO will help strengthen the positive effect of MT as MO directs the value of MT for improvement of competitive strategy and customer experience with a market focus on generation, dissemin...

  1. Student Mobility and Transnational Social Ties as Factors of Reflexivity

    Directory of Open Access Journals (Sweden)

    Tea Golob

    2018-03-01

    Full Text Available The article seeks to develop and apply new quantitative measurement instruments capable of significantly improving understanding of the relationship between the transnational mobility and transnational social ties of students, along with their reflexive capacities. With a focus on students building their personal networks, educational and professional activities that extend beyond the nation’s borders and organising their day-to-day routines in transnational social spaces, we analyse the role of mobility in their reflexive capacities. Applying a tool that is line with Archer’s theory and indicators to measure reflexivity, and transnational social ties as proposed by Molina et al., we analyse data collected via an on-line survey questionnaire administered to Slovenian students. In addition, students from the Middle East (Lebanon and the USA (Hawai’i are added for comparative purposes. The results of path analysis show the Slovenian students’ mobility as such implies higher scores for meta reflexivity, combined with lower scores for communicative and fractured reflexivity. Further, social transactions reaching beyond one’s physical localities in terms of transnational social ties implies they have higher levels of reflexivity in general.

  2. ERT and Well Data Tie for Nickel Laterite Characterization

    Science.gov (United States)

    Aswad, Sabrianto; Mamela Mais, Difar; Syamsuddin; Wanni

    2018-03-01

    The need of ERT method in nickel latentes exploration can’t be deny. This method have capability to make exploration more effective and efficient. In reality this method still remain ambiguity in its application, especially for geologist and mining expert. These ambiguity related with layer zone determination (limonite, saprolite and bedrock), the same resistivity values in the different zones and determination of bedrock. This paper try to expose interesting fact to overcome this ambiguity by using ERT data and drill data tie. This tie will show characteristic of nickel lateric based on resisitivity value and the contribution of chemistry element for resistivity value. Data ERT was collected by using gradient configuration and well data consist of mayor element and minor element. Tie result showed difference resistivity value in limonite layer influence by Fe, H2O and Ni, where resistivity value from saprolite layer influenced by Fe, H2O, Si02, MgO, Al, Cr, and Ni in certain accumulation. In bedrock layer, almost all drill data did not reach bedrock but only reached the boulder alone, it is supported by the value of the resistivity of rock unserpentinized peridotite which should show a relatively large resistivity value

  3. Kinetic-scale flux rope reconnection in periodic and line-tied geometries

    Science.gov (United States)

    Sauppe, J. P.; Daughton, W.

    2018-01-01

    The collisionless reconnection of two parallel flux ropes driven by both the coalescence and kink instabilities is examined using fully kinetic simulations in periodic and line-tied geometries. The three-dimensional reconnection rate is computed from the maximum of the quasi-potential, Ξ ≡ - ∫ E . d ℓ , where the integral of the electric field is taken along the magnetic field lines across the system. In periodic simulations in which the kink mode is nearly suppressed, reconnection is driven by the coalescence instability, and the peak rate is within 3%-8% of comparable 2D simulations. When a strong kink growth is observed, the peak reconnection rate drops by 10%-25%, and there is a larger drop for lower guide field. With line-tied boundary conditions, the kink instability plays a key role in allowing the flux ropes to interact and partially reconnect. In this limit, the field lines with maximum quasi-potential are associated with a quasi-separatrix layer, and the electric field along these special field lines is supported predominantly by the divergence of the electron pressure tensor. Both of these features, along with the observed reconnection rate, are consistent with recent laboratory experiments on kinetic-scale flux ropes. In kinetic simulations, the non-gyrotropic pressure tensor terms contribute significantly more to the reconnecting electric field than do the gyrotropic terms, while contributions from the electron inertia are significant for field lines adjacent to the quasi-separatrix layer.

  4. The critical manifolds of inhomogeneous bond percolation on bow-tie and checkerboard lattices

    Science.gov (United States)

    Ziff, Robert M.; Scullard, Christian R.; Wierman, John C.; Sedlock, Matthew R. A.

    2012-12-01

    We give a conditional derivation of the inhomogeneous critical percolation manifold of the bow-tie lattice with five different probabilities, a problem that does not appear at first to fall into any known solvable class. Although our argument is mathematically rigorous only on a region of the manifold, we conjecture that the formula is correct over its entire domain, and we provide a non-rigorous argument for this that employs the negative probability regime of the triangular lattice critical surface. We discuss how the rigorous portion of our result substantially broadens the range of lattices in the solvable class to include certain inhomogeneous and asymmetric bow-tie lattices, and that, if it could be put on a firm foundation, the negative probability portion of our method would extend this class to many further systems, including F Y Wu’s checkerboard formula for the square lattice. We conclude by showing that this latter problem can in fact be proved using a recent result of Grimmett and Manolescu for isoradial graphs, lending strong evidence in favor of our other conjectured results. This article is part of ‘Lattice models and integrability’, a special issue of Journal of Physics A: Mathematical and Theoretical in honour of F Y Wu's 80th birthday.

  5. Management of posterior ankyloglossia and upper lip ties in a tertiary otolaryngology outpatient clinic.

    Science.gov (United States)

    Benoiton, Lara; Morgan, Maggie; Baguley, Katherine

    2016-09-01

    Recent studies have shown an association between ankyloglossia (tongue tie) and upper-lip ties to breastfeeding difficulties. Treatment is commonly multidisciplinary involving lactation consultants and surgical management with tongue tie and upper lip tie release. There is currently limited data looking at posterior ankyloglossia and upper lip ties. Consecutive patients seen at an ENT outpatient clinic for ankyloglossia and upper-lip ties from May 2014-August 2015 were assessed for an outpatient frenotomy. Breastfeeding outcomes were assessed following the procedure. 43 babies were seen and 34 patients had a procedure carried out. Babies ranged from 2 to 20 weeks old with the median age being 6.6 weeks. The most common presenting complaint was latching issues (85%) with mothers' painful nipples being the second (65%). 21 patients (62%) had a tongue tie release, 10 (29%) had both a tongue tie and upper lip tie divided, whereas 3 (9%) had an upper-lip tie alone divided. 29 (85%) of the patients who had a procedure carried out had an immediate improvement in breastfeeding, while 28 (82%) had a continued improvement at 2 weeks follow up. Frenotomy for posterior ankyloglossia and upper lip ties is a simple procedure that can be carried out in an outpatient setting with apparent immediate benefit. Otolaryngologists are likely to have an increasing role to play in the evaluation and management of ankyloglossia and upper lip ties in babies with breastfeeding difficulties. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

  6. How crosscutting weak ties are established : The case of Muslims in Europe

    NARCIS (Netherlands)

    Damstra, A.; Tillie, J.

    2016-01-01

    Building on the work of Granovetter [1973. “The Strength of Weak Ties.” American Journal of Sociology 78 (6): 1360–1380.], weak ties are assumed to play a vital role in processes of integration. In this paper, the focus lies on weak ties that cut across ethnic boundaries, connecting Muslim

  7. Identifying Weak Ties from Publicly Available Social Media Data in an Event

    DEFF Research Database (Denmark)

    Prakash Gupta, Jayesh; Menon, Karan; Kärkkäinen, Hannu

    2016-01-01

    The concept of weak ties was introduced by Granovetter through the seminal paper titled "Strength of weak ties". Since then the role of weak ties in general and their specific role as occupying the structural hole has been explored in many different fields. In this study, we identify actual...

  8. 77 FR 21620 - Notice of the Buy America Waiver Request for Vossloh 101-LV Concrete Ties

    Science.gov (United States)

    2012-04-10

    ... the Buy America Waiver Request for Vossloh 101-LV Concrete Ties AGENCY: Federal Railroad... concrete ties, which contain certain components not manufactured in the United States. In furtherance of... concrete ties. FRA has received this request from the four States for the following projects: (a) The...

  9. 78 FR 37236 - Prestressed Concrete Steel Rail Tie Wire From China, Mexico, and Thailand

    Science.gov (United States)

    2013-06-20

    ... imports from China, Mexico, and Thailand of prestressed concrete steel rail tie wire, provided for in... threatened with material injury by reason of LTFV imports of prestressed concrete steel rail tie wire from... USITC Publication 4397 (June 2013), entitled Prestressed Concrete Steel Rail Tie Wire from China, Mexico...

  10. TIES for Dummies 3rd Edition (Technology Identification, Evaluation, and Selection) Basic how to's to implement the TIES method

    Science.gov (United States)

    Kirby, Michelle R.

    2002-01-01

    The TIES method is a forecasting environment whereby the decision-maker has the ability to easily assess and trade-off the impact of various technologies without sophisticated and time-consuming mathematical formulations. TIES provides a methodical approach where technically feasible alternatives can be identified with accuracy and speed to reduce design cycle time, and subsequently, life cycle costs, and was achieved through the use of various probabilistic methods, such as Response Surface Methodology and Monte Carlo Simulations. Furthermore, structured and systematic techniques are utilized from other fields to identify possible concepts and evaluation criteria by which comparisons can be made. This objective is achieved by employing the use of Morphological Matrices and Multi-Attribute Decision Making techniques. Through the execution of each step, a family of design alternatives for a given set of customer requirements can be identified and assessed subjectively or objectively. This methodology allows for more information (knowledge) to be brought into the earlier phases of the design process and will have direct implications on the affordability of the system. The increased knowledge allows for optimum allocation of company resources and quantitative justification for program decisions. Finally, the TIES method provided novel results and quantitative justification to facilitate decision making in the early stages of design so as to produce affordable and quality products.

  11. The Best of Both Worlds? Online Ties and the Alternating Use of Social Network Sites in the Context of Migration

    Directory of Open Access Journals (Sweden)

    Jens F. Binder

    2014-12-01

    Full Text Available While an ever-growing body of research is concerned with user behavior on individual social network sites (SNSs—mostly Facebook—studies addressing an alternating use of two or more SNS are rare. Here, we investigate the relationship between alternating SNS use and social capital in the context of migration. Alternating SNS use avoids some of the problems associated with large networks located on one site; in particular the management of different social or cultural spheres. Not only does this strategy hold potential for increased social capital, it also provides a particular incentive for migrants faced with the challenge of staying in touch with back home and managing a new social environment. Two survey studies are presented that focus on the relationship between alternating SNS use and online ties in a migrant context involving Indian nationals. Study 1 looked at migration within India, whereas Study 2 compared international with domestic SNS users. In both studies, alternating SNS use added to the prediction of online network size and accounted for differences in network size found for migrant and non-migrant users. Differences were due to the number of peripheral ties, rather than core ties. Findings suggest that alternating SNS use may constitute a compensatory strategy that helps to overcome lower levels of socializing represented through a single SNS.

  12. Stimulated mast cells promote maturation of myocardial microvascular endothelial cell neovessels by modulating the angiopoietin-Tie-2 signaling pathway

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Z.H. [Division of Cardiology, Shanghai Sixth People' s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China, Division of Cardiology, Shanghai Sixth People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai (China); Yancheng People' s First Hospital, Division of Cardiology, Yancheng, Jiangsu, China, Division of Cardiology, Yancheng People’s First Hospital, Yancheng, Jiangsu (China); Zhu, W.; Tao, J.P.; Zhang, Q.Y.; Wei, M. [Division of Cardiology, Shanghai Sixth People' s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China, Division of Cardiology, Shanghai Sixth People’s Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai (China)

    2013-10-22

    Angiopoietin (Ang)-1 and Ang-2 interact in angiogenesis to activate the Tie-2 receptor, which may be involved in new vessel maturation and regression. Mast cells (MCs) are also involved in formation of new blood vessels and angiogenesis. The present study was designed to test whether MCs can mediate angiogenesis in myocardial microvascular endothelial cells (MMVECs). Using a rat MMVEC and MC co-culture system, we observed that Ang-1 protein levels were very low even though its mRNA levels were increased by MCs. Interestingly, MCs were able to enhance migration, proliferation, and capillary-like tube formation, which were associated with suppressed Ang-2 protein expression, but not Tie-2 expression levels. These MCs induced effects that could be reversed by either tryptase inhibitor [N-tosyl-L-lysine chloromethyl ketone (TLCK)] or chymase inhibitor (N-tosyl-L-phenylalanyl chloromethyl ketone), with TLCK showing greater effects. In conclusion, our data indicated that MCs can interrupt neovessel maturation via suppression of the Ang-2/Tie-2 signaling pathway.

  13. Ties That Bind: Creating and sustaining community-academic partnerships

    Directory of Open Access Journals (Sweden)

    Kynna N. Wright

    2011-11-01

    Full Text Available Growing interest among academics and health professionals in finding new ways to study and address complex health and social problems has manifested in recent years with increasing community demands for research and program implementation that is community-based, rather than merely community placed. In the United States, community-based participatory research (CBPR, with its emphasis on the creation and use of community-university or community-academic partnerships, is the prevailing paradigm to address these complex problems, especially those concerning racial/ethnic disparities in health and health care. While the need to strengthen the relationship between researchers and the community has been recognised, often from the viewpoint of the university partner, discussions on sustainability of partnerships have been few. The aim of this paper is to share reflections, through the eyes of the community members, on the core elements that tie community and academic members together and the challenges in understanding and nurturing those ties so that the community-academic partnership is sustained over time, and to offer possible recommendations for sustainability. This article speaks from the community’s perspective and reflects on the vital elements/components that tie together community-university partnerships and the challenges that may occur when trying to sustain and grow the partnership. It is based on a research CBPR study that was conducted to (1 evaluate the functioning and future sustainability of the community-university partnership of the Community Child Health Network Study Los Angeles (CCHN-LA community-university partnership, and (2 evaluate the experience and beliefs of the current CCHN-LA community-university partnership members in their understanding of current functioning. Keywords Community-academic partnerships; sustainability; challenges; solutions

  14. Tongue-tie, from embriology to treatment: a literature review

    Directory of Open Access Journals (Sweden)

    Maria Dezio

    2015-03-01

    Full Text Available The aim of this review is to create a complete analysis about tongue-tie (or short lingual frenum or ankyloglossia according to the most important works published in literature. The analysis allowed us to do a complete evaluation of this problem, from embriology to the therapeutic approach we could use today, focusing our attention on laser-assisted therapy. This review is based on the research on the PubMed Database (www.ncbi.nlm.nih.gov of studies about lingual frenum written in English between January 1980 and May 2014. The keywords inserted were “lingual frenum”, “frenectomy”, “laser therapy”. We have analyzed: case series, case reports, clinical studies, and also literature reviews in which embryology, physiology, diagnosis and treatment of ankyloglossia were described. We excluded laboratory studies, studies based on animal tests and studies about patients with particular syndromes in which we can also find tongue-tie. The selection criteria allowed us to select 42 articles. The treatment options for the releasing of the frenum are surgically represented by frenotomy (i.e. simple horizontal cut of this training and frenectomy (i.e. removal. In both cases, the intervention on the short lingual frenum is simple, short-lasting, and without particular complications. Furthermore, this kind of treatment can be carried out with different devices: with the typical cold blade scalpel or by the use of laser, a new method that shows more advantages over the prior art. Laser-assisted therapy permits to intervene on newborns (from 0 to 20 days, when there are breastfeeding problems without total anesthesia and suture. The Er:YAG, CO2 laser (according to literature data and Diode laser (according to our experience are advantageous, safe and effective in tongue-tie treatment.

  15. Testing strong interaction theories

    International Nuclear Information System (INIS)

    Ellis, J.

    1979-01-01

    The author discusses possible tests of the current theories of the strong interaction, in particular, quantum chromodynamics. High energy e + e - interactions should provide an excellent means of studying the strong force. (W.D.L.)

  16. Eagle Hats Mini-Technology Integration Experiment (TIE)

    Science.gov (United States)

    2005-07-01

    code base more portable to other Lisp dialects such as OpenMCL, LispWorks, Franz Lisp, and SBCL. The Hats mini-TIE Community Mechanics We have...is taken from stories in newspaper texts and is encoded in in the standard GB-scheme. Franz Kafka’s The Castle in the original German comprised the...the Chinese corpus, 32% of the Roma-ji corpus, 17% of the Orwell corpus, and 10% of the Kafka corpus, so it is not surprising that the algorithm

  17. Experimental Investigation of Tension Stiffening in RC Ties

    Directory of Open Access Journals (Sweden)

    Aleksandr Sokolov

    2016-01-01

    Full Text Available The increasing application of high-performance materials in civil engineering led to the development of reinforced concrete (RC structures with reduced cross sections and increased spans. In such structures serviceability limit state often becomes the governing condition of the design. Present study investigates the deformation behaviour of high-strength RC ties reinforced with high-grade bars. Experimental investigation was carried out measuring the postcracking stiffness of the specimens at high strain levels. It was found that, despite the reduction in stiffness, a considerable part of the average tensile stresses were carried by the concrete at the advanced loading stages, thus effectively stiffening the RC member.

  18. Markkinointisuunnitelma Oy Runoilijan tie s/s Tarjanteelle

    OpenAIRE

    Suojala, Jaana

    2012-01-01

    Tämän opinnäytetyön tehtävä on markkinointisuunnitelman laatiminen s/s Tarjanteelle ja Runoilijan tie Oy:lle. Tarve työlle tuli kun toimin purjehduskauden 2011 ravintola-vastaavana laivassa. Kesän aikana kävi ilmi selkeitä puutteita varsinkin markkinoinnissa. Näihin puutteisiin on tässä opinnäytetyössä etsitty ratkaisuja teoreettisista teoksista sekä suorittamalla asiakaskysely e-lomakkeella. Lomakkeella tiedusteltiin useita eri asioita markkinoinnista, mainonnasta sekä myös palvelusta yleens...

  19. Circulating Angiopoietin-2 and Its Soluble Receptor Tie-2 Concentrations Are Related to Renal Function in Two Population-Based Cohorts

    DEFF Research Database (Denmark)

    Hennings, Anna; Hannemann, Anke; Rettig, Rainer

    2016-01-01

    the associations between renal function and serum Ang-2 or serum Tie-2 concentrations in the general population. METHODS: Data of 3081 and 4088 subjects from two population-based studies, the Study of Health in Pomerania (SHIP-1) and SHIP-Trend, were used. Renal function was assessed by serum creatinine, cystatin...... weak U-shaped associations between serum creatinine concentrations or eGFR(crea) and serum Ang-2 concentrations. With respect to uACR a strong positive association with serum Ang-2 concentrations was revealed. CONCLUSION: Serum Ang-2 concentrations are strongly associated with sensitive parameters...... not detect the same strong relations between serum creatinine and eGFR(crea) with serum Ang-2 concentration. Additionally, significant association of serum Tie-2 concentrations with cystatin C and eGFR(cys) were detected....

  20. Tongue-tie division to treat breastfeeding difficulties: our experience.

    Science.gov (United States)

    Sharma, S D; Jayaraj, S

    2015-10-01

    To assess the benefits of frenotomy on breastfeeding in infants, and determine the influence of age. A telephone questionnaire of all patients diagnosed with tongue-tie over 12 months was conducted pre-intervention and 1-month post-intervention. The Infant Breastfeeding Assessment Tool was used to assess breastfeeding. Of 54 infants diagnosed with tongue-tie, 78 per cent of mothers participated in the survey. Eighty-six per cent of patients underwent frenotomy, with no surgical complications. In the frenotomy group, 81 per cent of mothers reported improvement in breastfeeding, versus 17 per cent in the non-surgical group (p = 0.0074). In the frenotomy group, the mean (±standard deviation) Infant Breastfeeding Assessment Tool score was 3.33 ± 1.51 pre-intervention, versus 9.19 ± 2.44 post-intervention (p = 0.0001). In the non-surgical intervention group, the mean score (±standard deviation) was 4.17 ± 0.75 pre-intervention, versus 6.00 ± 1.73 post-intervention (p = 0.16). For infants who underwent frenotomy, there was a reported improvement in 94 per cent of those aged less than 30 days, versus 68 per cent in infants aged over 30 days (p = 0.092). Frenotomy is a safe, short procedure that improves breastfeeding outcomes, and is best performed at an early age.

  1. Pediatric tongue-tie division: indications, techniques and patient satisfaction.

    Science.gov (United States)

    Klockars, Tuomas; Pitkäranta, Anne

    2009-10-01

    To study the characteristics and outcome of paediatric tongue-tie division. Retrospective analyses of 317 paediatric tongue-tie divisions (frenotomy or frenuloplasty). Based on a questionnaire returned by 159 (51%) of patients (or guardians) the most common indication was speech/articulation problems (64%). Other indications included restricted movement (18%) and lactation/nutrition problems (8%). 84% of patients (or guardians) reported benefit from the operation. The initial surgical technique was frenotomy (no or local anaesthesia) for 34%, frenotomy (general anaesthesia) for 16%, frenuloplasty (no or local anaesthesia) for 5% and frenuloplasty (general anaesthesia) for 46% of the patients. Almost one-third of children treated with frenotomy under no or local anaesthesia needed re-operation compared to one out of 181 (0.6%) treated with frenotomy or frenuloplasty under general anaesthesia. There were no postoperative complications. Frenotomy under no or local anaesthesia is safe and cost-effective, but one-third of children need re-operation. Adequate division of the frenulum is more important than the technique (frenuloplasty vs. frenotomy) used and seems to be easier to achieve under general anaesthesia.

  2. Diversity of social ties in scientific collaboration networks

    Science.gov (United States)

    Shi, Quan; Xu, Bo; Xu, Xiaomin; Xiao, Yanghua; Wang, Wei; Wang, Hengshan

    2011-11-01

    Diversity is one of the important perspectives to characterize behaviors of individuals in social networks. It is intuitively believed that diversity of social ties accounts for competition advantage and idea innovation. However, quantitative evidences in a real large social network can be rarely found in the previous research. Thanks to the availability of scientific publication records on WWW; now we can construct a large scientific collaboration network, which provides us a chance to gain insight into the diversity of relationships in a real social network through statistical analysis. In this article, we dedicate our efforts to perform empirical analysis on a scientific collaboration network extracted from DBLP, an online bibliographic database in computer science, in a systematical way, finding the following: distributions of diversity indices tend to decay in an exponential or Gaussian way; diversity indices are not trivially correlated to existing vertex importance measures; authors of diverse social ties tend to connect to each other and these authors are generally more competitive than others.

  3. Poor textural image tie point matching via graph theory

    Science.gov (United States)

    Yuan, Xiuxiao; Chen, Shiyu; Yuan, Wei; Cai, Yang

    2017-07-01

    Feature matching aims to find corresponding points to serve as tie points between images. Robust matching is still a challenging task when input images are characterized by low contrast or contain repetitive patterns, occlusions, or homogeneous textures. In this paper, a novel feature matching algorithm based on graph theory is proposed. This algorithm integrates both geometric and radiometric constraints into an edge-weighted (EW) affinity tensor. Tie points are then obtained by high-order graph matching. Four pairs of poor textural images covering forests, deserts, bare lands, and urban areas are tested. For comparison, three state-of-the-art matching techniques, namely, scale-invariant feature transform (SIFT), speeded up robust features (SURF), and features from accelerated segment test (FAST), are also used. The experimental results show that the matching recall obtained by SIFT, SURF, and FAST varies from 0 to 35% in different types of poor textures. However, through the integration of both geometry and radiometry and the EW strategy, the recall obtained by the proposed algorithm is better than 50% in all four image pairs. The better matching recall improves the number of correct matches, dispersion, and positional accuracy.

  4. Organizing learning processes on risks by using the bow-tie representation

    Energy Technology Data Exchange (ETDEWEB)

    Chevreau, F.R. [Ecole des Mines de Paris, 06904 Sophia-Antipolis (France)]. E-mail: chevreau@cindy.ensmp.fr; Wybo, J.L. [Ecole des Mines de Paris, 06904 Sophia-Antipolis (France)]. E-mail: wybo@cindy.ensmp.fr; Cauchois, D. [Process Safety Department, Sanofi-Aventis, Site de Production de Vitry sur Seine, 9 Quai Jules Guesdes, 94400 Vitry sur Seine (France)]. E-mail: didier.cauchois@sanofi-aventis.com

    2006-03-31

    The Aramis method proposes a complete and efficient way to manage risk analysis by using the bow-tie representation. This paper shows how the bow-tie representation can also be appropriate for experience learning. It describes how a pharmaceutical production plant uses bow-ties for incident and accident analysis. Two levels of bow-ties are constructed: standard bow-ties concern generic risks of the plant whereas local bow-ties represent accident scenarios specific to each workplace. When incidents or accidents are analyzed, knowledge that is gained is added to existing local bow-ties. Regularly, local bow-ties that have been updated are compared to standard bow-ties in order to revise them. Knowledge on safety at the global and at local levels is hence as accurate as possible and memorized in a real time framework. As it relies on the communication between safety experts and local operators, this use of the bow-ties contributes therefore to organizational learning for safety.

  5. Organizing learning processes on risks by using the bow-tie representation

    International Nuclear Information System (INIS)

    Chevreau, F.R.; Wybo, J.L.; Cauchois, D.

    2006-01-01

    The Aramis method proposes a complete and efficient way to manage risk analysis by using the bow-tie representation. This paper shows how the bow-tie representation can also be appropriate for experience learning. It describes how a pharmaceutical production plant uses bow-ties for incident and accident analysis. Two levels of bow-ties are constructed: standard bow-ties concern generic risks of the plant whereas local bow-ties represent accident scenarios specific to each workplace. When incidents or accidents are analyzed, knowledge that is gained is added to existing local bow-ties. Regularly, local bow-ties that have been updated are compared to standard bow-ties in order to revise them. Knowledge on safety at the global and at local levels is hence as accurate as possible and memorized in a real time framework. As it relies on the communication between safety experts and local operators, this use of the bow-ties contributes therefore to organizational learning for safety

  6. Students’ delinquency and correlates with strong and weaker ties : A study of students’ networks in Dutch high schools

    NARCIS (Netherlands)

    Baerveldt, Chris; Rossem, Ronan van; Vermande, Marjolein; Weerman, Frank

    2004-01-01

    The goal of the present study was to investigate three issues in the current debate on youth delinquency: (1) Whether the level of delinquency of adolescents is negatively correlated with the quality of her/his personal networks (as stated by the social inability model) or not (as stated by the

  7. The weakness of family ties and their perpetuating effects on gender violence: a qualitative study in Mexico.

    Science.gov (United States)

    Agoff, Carolina; Herrera, Cristina; Castro, Roberto

    2007-11-01

    Research into intimate partner violence has shown that social isolation constitutes a risk factor, and the presence of social networks can be an important source of social support. This research note presents some results of an empirical study carried out in Mexico into women's social relations, especially their family relations, and their role in the promotion of traditional gender norms. Findings indicate that some of the main conditions that are associated with the production of violence against women are either generated or reinforced within the realm of what can be regarded as women's "strong ties."

  8. 78 FR 29325 - Prestressed Concrete Steel Rail Tie Wire From Mexico, the People's Republic of China, and...

    Science.gov (United States)

    2013-05-20

    ...] Prestressed Concrete Steel Rail Tie Wire From Mexico, the People's Republic of China, and Thailand: Initiation... of prestressed concrete steel rail tie wire (``PC tie wire'') from Mexico, the PRC, and Thailand... Prestressed Concrete Steel Rail Tie Wire from the PRC, Mexico, and Thailand, filed on April 23, 2013 (the...

  9. Representation of Women With Industry Ties in Ophthalmology.

    Science.gov (United States)

    Reddy, Ashvini K; Bounds, Gregory W; Bakri, Sophie J; Gordon, Lynn K; Smith, Justine R; Haller, Julia A; Thorne, Jennifer E

    2016-06-01

    Women in ophthalmology are growing in number and have made strides in traditional metrics of professional achievement. Professional ties to industry represent another potential means of career advancement, recognition, and income. To report the representation of women among ophthalmologists receiving industry remuneration for research, consulting, honoraria, grants, royalties, and faculty/speaker roles. In this observational, retrospective study, the Centers for Medicare and Medicaid Services Open Payments database for payments to ophthalmologists by biomedical companies was reviewed for representation, median payments, and mean payments by women and men for industry relationships in 2013 and 2014. The analysis was performed from July 2015 to November 2015. The primary outcome measures were percentage representation of women vs men overall and in industry research, consulting, speaking roles, royalties and licenses, grants, services other than consulting, and honoraria. Secondary outcome measures included mean and median payments from industry to female vs male ophthalmologists. In 2013, 4164 of 21 380 (19.5%) ophthalmologists were women, and of 1204 ophthalmologists analyzed for industry payments, 176 (4.2%) women had industry ties compared with 1028 (6%) men (P women were $11 419 compared with $20 957 for men (P = .001), and median payments to women were $3000 compared with $4787 for men (P = .007). In 2013, women were underrepresented among ophthalmologists receiving industry payments for research (49 of 462 [10.6%]), consulting (96 of 610 [15.7%]), honoraria (3 of 47 [6.4%]), industry grants (1 of 7 [14.3%]), royalties and licenses (1 of 13 [7.7%]), and faculty/speaker roles (2 of 48 [4.2%]). In 2014, 4352 of 21 531 (20.2%) of ophthalmologists were women. Of 1518 ophthalmologists analyzed for industry payments, 255 (6%) women had industry ties compared with 1263 (7.4%) men (P women were $14 848 compared with $30 513 for men (P = .004

  10. Transnational Ties and Past-Year Major Depressive Episodes among Latino Immigrants

    Science.gov (United States)

    Alcántara, Carmela; Chen, Chih-Nan; Alegría, Margarita

    2014-01-01

    Objective Latino immigrants live in an increasingly global world where maintaining contact with kin in the home country is easier than ever. We examined: (a) the annual distribution of remittances burden (percentage of remittances/household income) and visits to the home country; (b) the association of these transnational ties with odds of a past-year major depressive episode (MDE); and (c) moderation by Latino sub-ethnicity or gender. Methods We conducted weighted logistic regression analyses with the Latino immigrant subsample (N=1614) of the National Latino and Asian American Study. Results Mexican and Other Latino immigrants had greater remittances burden than Puerto Rican migrants. Cuban immigrants made fewer visits back home than Puerto Rican migrants. After adjustment for socio-demographics and pre-migration psychiatric history, a percentage increase in remittances burden decreased odds of MDE (OR=0.80 [95%CI:0.67–.0.98]), whereas visits back home increased odds of MDE (OR=1.04 [95%CI:1.01–1.06]). Latino sub-ethnicity was not a significant moderator. Visits back home were more strongly linked to depression among women than men. Conclusions The distribution of transnational ties differs by Latino subgroup, although its association with depression is similar across groups. Monetary giving in the form of remittances might promote a greater sense of self-efficacy, social integration, and caregiving for relatives back home that positively affect mental health. Visits back home, especially for women, might signal social stress from strained relationships with kin/spouses/children left behind, or increased caregiving demands that negatively affect mental health. Clinical practice with immigrants should routinely assess the social resources and strains that fall outside national borders. PMID:25090146

  11. Group Ties Protect Cognitive Health by Promoting Social Identification and Social Support.

    Science.gov (United States)

    Haslam, Catherine; Cruwys, Tegan; Milne, Matilda; Kan, Chi-Hsin; Haslam, S Alexander

    2016-03-01

    Social relationships are protective of cognitive health as we age and recent findings show that social group ties (e.g., with community and peer groups) are especially important. The present research examines this relationship further to explore (a) the contribution of group, relative to interpersonal, ties and (b) underlying mechanism. Two cross-sectional survey studies were conducted. Study 1 was conducted online (N = 200) and Study 2 involved face-to-face interviews (N = 42). The findings confirmed group ties as a stronger predictor of cognitive health than individual ties. It also supported our proposed sequential mediation model suggesting that the benefits of group ties arise from their capacity to enhance a sense of shared social identification and this, in turn, provides the basis for effective social support. Both studies provided evidence consistent with claims that group ties were especially beneficial because they cultivated social identification that provided the foundation for social support. © The Author(s) 2015.

  12. Importance of tie strengths in the prisoner's dilemma game on social networks

    International Nuclear Information System (INIS)

    Xu, Bo; Liu, Lu; You, Weijia

    2011-01-01

    Though numerous researches have shown that tie strengths play a key role in the formation of collective behavior in social networks, little work has been done to explore their impact on the outcome of evolutionary games. In this Letter, we studied the effect of tie strength in the dynamics of evolutionary prisoner's dilemma games by using online social network datasets. The results show that the fraction of cooperators has a non-trivial dependence on tie strength. Weak ties, just like previous researches on epidemics and information diffusion have shown, play a key role by the maintenance of cooperators in evolutionary prisoner's dilemma games. -- Highlights: → Tie strength is used to measure heterogeneous influences of different pairs of nodes. → Weak ties play a role in maintaining cooperation in prisoner's dilemma games. → Micro-dynamics of nodes are illustrated to explain the conclusion.

  13. Studi Tentang Political Tie, Pengaruhnya Terhadap Keputusan Pemberian Kredit Bank di Indonesia

    Directory of Open Access Journals (Sweden)

    Elisa Tjondro

    2012-01-01

    Full Text Available This study uses bank loan data to examine the effect of (political tie between the company and the government to on the assessment of companies financial leverage and profitability in the bank lending decisions in Indonesia. The numbers of samples are 1465 observations. This study uses moderated regression analysis (MRA. The study finds that a political tie affect corporate profitability assessment in bank lending decisions. Firms with lower profitability receive larger bank loan because their political tie (rent-seeking hypothesis. However, this study inds that a political tie does not affect the assessment of financial leverage in bank's lending decisions. This finding also supports Faccio (2010, Fisman (2001, and Backman (2001. Indonesia condition which has a weak institutional regulation and high information asymmetry is beneficial for companies that have a political tie. This leads to more trusted political tie as an indicator of the profitability.

  14. Strengthening Weak Ties through On-line Gaming

    DEFF Research Database (Denmark)

    Sudzina, Frantisek; Razmerita, Liana; Kirchner, Kathrin

    On-line gaming became widespread in the last couple of years. The aim of the research presented in the paper is to figure out to what extent does game playing helps to strengthen weak ties and what additional factors influence this process. The approach is rather exploratory – some factors...... are grounded in theory, some are new. These factors are age, gender, place of origin, number of their Facebook connections (friends in Facebook terminology), the amount of time they are on Facebook, the amount of time they keep the Facebook site open, the amount of time they play on-line games, and the reasons...... for starting to play on-line games. Regarding the latter, we chose to focus only on escapist reasons....

  15. Transnational ties and mental health of Caribbean immigrants.

    Science.gov (United States)

    Murphy, Eleanor J; Mahalingam, Ramaswami

    2004-10-01

    Immigration scholars have demonstrated the increasing importance of transnational activities among contemporary immigrants. While much of the previous research has emphasized social and economic outcomes, very little attention has been paid to psychological well-being or mental health. Using a community sample of West Indian immigrants, we developed an empirical measure of the nature and frequency of transnational practices. The resulting Transnationalism Scale is examined for psychometric properties using an exploratory principal components factor analysis, and bivariate correlations with pre-existing measures of psychological well-being, perceived social support, and ethnic identity. Results reveal five factors, some of which are significantly correlated with measures of psychological well-being, social support, and ethnic identity. Findings suggest that transnationalism, as a construct, is a valid measure for this population. We argue that transnational ties shape various aspects of immigrants' lives.

  16. Hands Tied with Bag Full of Books in Suicidal Hanging.

    Science.gov (United States)

    Sikary, Asit Kumar; Behera, Chittaranjan; Murty, Om Prakash; Rautji, Ravi

    2016-01-01

    Hanging deaths associated with binding of limbs, masking of a face, and gagging are always suspicious. In suicidal hanging, the victim uses these added techniques to prevent him from backing out of his decision and to ensure death. However, binding of limbs and adding extra weight to the suspension in hanging are not reported. Herein, we report a case where the victim tied a bag containing books weighing 7 kg (15.4 lbs) to both his hands during hanging. The forensic specialist must be aware of the unusual presentation of suicidal hanging which may suggest foul play. The manner of death must be established after detailed analysis of circumstantial evidence, information obtained from the witnesses, complete autopsy, and toxicological examination. © 2015 American Academy of Forensic Sciences.

  17. A short note on how tied fights affect cortisol levels.

    Science.gov (United States)

    Cooper, Edwin L; Ngo, Kathy T

    2013-09-01

    Previous work exploring the interrelationships between sex steroids (e.g. androgens, testosterones and 11-ketotestosterones) and social behavior in teleosts suggest that mirror-elicited aggression in cichlid fish may not trigger a hormonal response. Using the Mozambique tilapia (Oreochromis mossambicus) to analyze immune responses as a result of social stress, we measured levels of cortisol and melatonin using Enzyme-Linked Immunosorbent Assay (ELISA) assays. In this work, we demonstrated that cortisol concentrations are significantly lower yet the levels of melatonin remain unchanged in tilapia that are fighting their mirror image. Our results suggested that in tied fights, certain hormone levels remain unchanged (e.g. androgens) due to the lack of melatonin induction. © 2012 Wiley Publishing Asia Pty Ltd, ISZS and IOZ/CAS.

  18. Return of the Bear Russia’s Ties with Former Soviet Allies in Latin America

    Science.gov (United States)

    2016-03-01

    RUSSIA’S TIES WITH FORMER SOVIET ALLIES IN LATIN AMERICA by David M. Cox March 2016 Thesis Advisor: Thomas Bruneau Second Reader...DATES COVERED Master’s Thesis 4. TITLE AND SUBTITLE RETURN OF THE BEAR? RUSSIA’S TIES WITH FORMER SOVIET ALLIES IN LATIN AMERICA 5. FUNDING NUMBERS...the Cold War to Russian ties with Cuba and Nicaragua today, this thesis finds that Russia’s reengagement with former Soviet allies in Latin America

  19. Reducing Electromagnetic Interference in a Grid Tied Single Phase Power Inverter

    Science.gov (United States)

    2016-09-01

    ELECTROMAGNETIC INTERFERENCE IN A GRID TIED SINGLE PHASE POWER INVERTER by Jason Hassan Valiani September 2016 Thesis Advisor: Giovanna Oriti...3. REPORT TYPE AND DATES COVERED Master’s thesis 4. TITLE AND SUBTITLE REDUCING ELECTROMAGNETIC INTERFERENCE IN A GRID TIED SINGLE PHASE POWER...The addition of a passive filter proved to minimize the conducted EMI for a single -phase grid-tied inverter. 14. SUBJECT TERMS single -phase

  20. Investigation of Bending Test Procedures for Engineered Polymer Composite Railroad Ties

    Science.gov (United States)

    2016-12-01

    ER D C/ CE RL C R- 16 -6 Investigation of Bending Test Procedures for Engineered Polymer Composite Railroad Ties Co ns tr uc tio n En...Test Procedures for Engineered Polymer Composite Railroad Ties Claire G. Ball CTL Group 5400 Old Orchard Road Skokie, IL 60077 Final report...conducting in- vestigations to help develop and evaluate engineered polymer composite railroad ties since 1993. Recent efforts, through funding and

  1. Frenotomy for tongue-tie in newborn infants.

    Science.gov (United States)

    O'Shea, Joyce E; Foster, Jann P; O'Donnell, Colm Pf; Breathnach, Deirdre; Jacobs, Susan E; Todd, David A; Davis, Peter G

    2017-03-11

    Tongue-tie, or ankyloglossia, is a condition whereby the lingual frenulum attaches near the tip of the tongue and may be short, tight and thick. Tongue-tie is present in 4% to 11% of newborns. Tongue-tie has been cited as a cause of poor breastfeeding and maternal nipple pain. Frenotomy, which is commonly performed, may correct the restriction to tongue movement and allow more effective breastfeeding with less maternal nipple pain. To determine whether frenotomy is safe and effective in improving ability to feed orally among infants younger than three months of age with tongue-tie (and problems feeding).Also, to perform subgroup analysis to determine the following.• Severity of tongue-tie before frenotomy as measured by a validated tool (e.g. Hazelbaker Assessment Tool for Lingual Frenulum Function (ATLFF) scores frenotomy (≤ 10 days of age; > 10 days to three months of age).• Severity of feeding difficulty (infants with feeding difficulty affecting weight gain (as assessed by infant's not regaining birth weight by day 14 or falling off centiles); infants with symptomatic feeding difficulty but thriving (greater than birth weight by day 14 and tracking centiles). We searched the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, Embase and CINAHL up to January 2017, as well as previous reviews including cross-references, expert informants and journal handsearching. We searched clinical trials databases for ongoing and recently completed trials. We applied no language restrictions. Randomised, quasi-randomised controlled trials or cluster-randomised trials that compared frenotomy versus no frenotomy or frenotomy versus sham procedure in newborn infants. Review authors extracted from the reports of clinical trials data regarding clinical outcomes including infant feeding, maternal nipple pain, duration of breastfeeding, cessation of breastfeeding, infant pain, excessive bleeding, infection at the site of frenotomy, ulceration at the site of

  2. GBFEL-TIE (Ground-Based Free Electron Laser Technology Experiment) sample survey on White Sands Missile Range, New Mexico: The NASA, Stallion, and Orogrande Alternatives. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Seaman, T.J.; Doleman, W.H.

    1988-09-30

    Three locations on White Sands Missile Range, New Mexico, are under consideration as alternatives for the proposed Ground-Based Free-Electron Laser Technology Integration Experiment (GBFEL-TIE). The study conducted jointly by Prewitt and Associates, Inc., and the Office of Contract Archeology, was designed to provide input into the GBFEL-TIE Draft Environmental Impact Statement concerning the potential impact of the proposed project on cultural resources in each of the alternatives. The input consists of a series of predictions based on data gathered from two sources: (1) a cultural resource sample survey (15%) of two alternatives conducted as part of this study, and (2) from a previous survey of the third alternative. A predictive model was devleoped and applied using these data that estimated the potential impact of the GBFEL-TIE facility on the cultural resources within each alternative. The predictions indicate that the NASA alternatives, by far, the least favorable location for the facility followed by the Orogrande and Stallion Alternatives.

  3. Strongly Correlated Topological Insulators

    Science.gov (United States)

    2016-02-03

    Strongly Correlated Topological Insulators In the past year, the grant was used for work in the field of topological phases, with emphasis on finding...surface of topological insulators. In the past 3 years, we have started a new direction, that of fractional topological insulators. These are materials...in which a topologically nontrivial quasi-flat band is fractionally filled and then subject to strong interactions. The views, opinions and/or

  4. Strong Cosmic Censorship

    Science.gov (United States)

    Isenberg, James

    2017-01-01

    The Hawking-Penrose theorems tell us that solutions of Einstein's equations are generally singular, in the sense of the incompleteness of causal geodesics (the paths of physical observers). These singularities might be marked by the blowup of curvature and therefore crushing tidal forces, or by the breakdown of physical determinism. Penrose has conjectured (in his `Strong Cosmic Censorship Conjecture`) that it is generically unbounded curvature that causes singularities, rather than causal breakdown. The verification that ``AVTD behavior'' (marked by the domination of time derivatives over space derivatives) is generically present in a family of solutions has proven to be a useful tool for studying model versions of Strong Cosmic Censorship in that family. I discuss some of the history of Strong Cosmic Censorship, and then discuss what is known about AVTD behavior and Strong Cosmic Censorship in families of solutions defined by varying degrees of isometry, and discuss recent results which we believe will extend this knowledge and provide new support for Strong Cosmic Censorship. I also comment on some of the recent work on ``Weak Null Singularities'', and how this relates to Strong Cosmic Censorship.

  5. ‘Not a Problem Until it Becomes a Problem’: A Qualitative Study of Values and Risks of In-house Family Ties in Swedish Workplaces

    Directory of Open Access Journals (Sweden)

    Katarina Haugen

    2016-12-01

    Full Text Available In-house family ties at workplaces occur in most contexts, and are associated with both advantages and disadvantages. On the basis of 40 interviews with human resource managers at Swedish workplaces, the values and risks of in-house family ties and their importance within the workplace are analyzed jointly, thus allowing for a holistic perspective. The interviews reveal values and risks on a strategic level, for day-to-day operations, for the social work environment, and on the level of individuals. Crucially, even when in-house family ties are perceived as uncomplicated, there is a latent risk that problems might arise. The interpretation of the role of in-house family ties is also strongly related to whether they are paired with asymmetrical (vertical power relations. It also depends heavily on the chosen perspective—that of the organization, the social work environment, the individual, or the broader society—and the perceived advantages tend to come with corresponding inverted disadvantages.

  6. “Strength of Weak Ties,” Neighborhood Ethnic Heterogeneity, and Depressive Symptoms among Adults: A Multilevel Analysis of Korean General Social Survey (KGSS 2012

    Directory of Open Access Journals (Sweden)

    Harris Hyun-soo Kim

    2017-06-01

    Full Text Available A substantial body of research, based largely on North American and European contexts, demonstrates that social networks play a critical role in protecting and promoting mental, as well as physical, health. The purpose of this study is to examine how “weak” and “strong” network relations are differentially related to individual mental health (depressive symptoms based on a nationally representative sample of South Korean adults. Using multilevel analysis, the current research also investigates the extent to which contextual or neighborhood-level factors moderate the associations between depression and social network. Findings show that regular interaction with weaker ties (acquaintances, neighbors, coworkers, etc. are associated with better mental health. The number of strong ties (family members and friends, on the other hand, is not a significant predictor of psychological distress. In addition, a cross-level interaction term is observed: The negative relationship between weak ties and depressive symptoms is diminished in neighborhoods with more foreign-born residents or immigrants. General implications beyond the empirical case under investigation are discussed, as to why weak ties can be “strong” in relation to mental health and how this phenomenon can vary according to residential characteristics such as ethnic heterogeneity.

  7. 'Ties that Bind and Differences that Divide': Exploring the ...

    African Journals Online (AJOL)

    This article investigates the resurgence of ethno-cultural identity in contemporary Nigeria. The article shows that contestations associated with ethno-cultural identity are not recent, but date back to the creation of the modern state called Nigeria. The article also demonstrates how colonialism fostered various social, ...

  8. The VEGF system and tie-2 are spatio-temporal expressed during tayassu placentation

    DEFF Research Database (Denmark)

    Miglino, M.A.; Santos, T.C.; Papa, P.C.

    Objectives: The vascular endothelial growth factor (VEGF) is one of the most important vascular mitogens, while the angiotensin receptor Tie-2 binds to the angiopoietin and stabilizes newly formed vessels. We therefore wanted to localize VEGF and its receptors VEGF-R1, VEGF-R2 and the Tie-2 recep...

  9. The Bright Side and Dark Side of Embedded Ties In Business-to-Business Innovation

    NARCIS (Netherlands)

    C.S. Noordhoff (Corine); K. Kyriakopoulos (Kyriakos); C. Moorman (Christina); P. Pauwels (Pieter); B.G.C. Dellaert (Benedict)

    2011-01-01

    textabstractWhile the number and importance of joint innovation projects between suppliers and their customers continue to rise, the literature has yet to resolve a key question—do embedded ties with customers help or hurt supplier innovation? Drawing on both the tie strength and knowledge

  10. The bright side and dark side of embedded ties in business-to-business innovation

    NARCIS (Netherlands)

    C.S. Noordhoff (Corine); K. Kyriakopoulos (Kyriakos); C. Moorman (Christina); P. Pauwels (Pieter); B.G.C. Dellaert (Benedict)

    2011-01-01

    textabstractAlthough the number and importance of joint innovation projects between suppliers and their customers continue to rise, the literature has yet to resolve a key question: Do embedded ties with customers help or hurt supplier innovation? Drawing on both the tie strength and knowledge

  11. The use of nylon cable ties to repair rib fractures in neonatal foals

    OpenAIRE

    Downs, Chris; Rodgerson, Dwayne

    2011-01-01

    Commercially available nylon cable ties were used as a method of internal fixation for displaced rib fractures in 8 equine neonates. The procedure was effective, well-tolerated, rapid, and inexpensive. The use of nylon cable ties as internal fixation for displaced rib fractures in foals is an effective surgical procedure.

  12. Effect of Wheel/Rail Loads on Concrete Tie Stresses and Rail Rollover.

    Science.gov (United States)

    2011-09-21

    As a result of vertical and lateral wheel/rail forces, high contact stresses can develop at the interface between the rail base and tie. Under certain conditions, these stresses can exceed the strength of the concrete tie and result in deterioration ...

  13. The use of nylon cable ties to repair rib fractures in neonatal foals

    Science.gov (United States)

    Downs, Chris; Rodgerson, Dwayne

    2011-01-01

    Commercially available nylon cable ties were used as a method of internal fixation for displaced rib fractures in 8 equine neonates. The procedure was effective, well-tolerated, rapid, and inexpensive. The use of nylon cable ties as internal fixation for displaced rib fractures in foals is an effective surgical procedure. PMID:21629427

  14. Neural dynamics of social tie formation in economic decision-making.

    Science.gov (United States)

    Bault, Nadège; Pelloux, Benjamin; Fahrenfort, Johannes J; Ridderinkhof, K Richard; van Winden, Frans

    2015-06-01

    The disposition for prosocial conduct, which contributes to cooperation as arising during social interaction, requires cortical network dynamics responsive to the development of social ties, or care about the interests of specific interaction partners. Here, we formulate a dynamic computational model that accurately predicted how tie formation, driven by the interaction history, influences decisions to contribute in a public good game. We used model-driven functional MRI to test the hypothesis that brain regions key to social interactions keep track of dynamics in tie strength. Activation in the medial prefrontal cortex (mPFC) and posterior cingulate cortex tracked the individual's public good contributions. Activation in the bilateral posterior superior temporal sulcus (pSTS), and temporo-parietal junction was modulated parametrically by the dynamically developing social tie-as estimated by our model-supporting a role of these regions in social tie formation. Activity in these two regions further reflected inter-individual differences in tie persistence and sensitivity to behavior of the interaction partner. Functional connectivity between pSTS and mPFC activations indicated that the representation of social ties is integrated in the decision process. These data reveal the brain mechanisms underlying the integration of interaction dynamics into a social tie representation which in turn influenced the individual's prosocial decisions. © The Author (2014). Published by Oxford University Press. For Permissions, please email: journals.permissions@oup.com.

  15. A Proposed Performance-Based System for Teacher Interactive Electronic Continuous Professional Development (TIE-CPD)

    Science.gov (United States)

    Razak, Rafiza Abdul; Yusop, Farrah Dina; Idris, Aizal Yusrina; Al-Sinaiyah, Yanbu; Halili, Siti Hajar

    2016-01-01

    The paper introduces Teacher Interactive Electronic Continuous Professional Development (TIE-CPD), an online interactive training system. The framework and methodology of TIE-CPD are designed with functionalities comparable with existing e-training systems. The system design and development literature offers several methodology and framework…

  16. Network ties and entrepreneurial orientation : Innovative performance of SMEs in a developing country

    NARCIS (Netherlands)

    Gunawan, Theresia; Jacob, J.; Duijsters, Geert

    This study investigates the role of intra-cluster ties, extra-cluster ties, and entrepreneurial orientation in shaping firms’ innovative performance. We conduct our analysis on a primary data set of 120 small and medium enterprises located in the Cibaduyut footwear-manufacturing cluster, Indonesia.

  17. Polycyclic aromatic hydrocarbon migration from creosote-treated railway ties into ballast and adjacent wetlands

    Science.gov (United States)

    Kenneth M. Brooks

    2004-01-01

    Occasionally, creosote-treated railroad ties need to be replaced, sometimes in sensitive environments such as wetlands. To help determine if this is detrimental to the surrounding environment, more information is needed on the extent and pattern of creosote, or more specifically polycyclic aromatic hydrocarbon (PAH), migration from railroad ties and what effects this...

  18. Finite element analyses of continuous filament ties for masonry applications: final report for the Arquin Corporation

    Energy Technology Data Exchange (ETDEWEB)

    Quinones, Sr., Armando [Arquin Corporation, La Luz, NM (United States); Bibeau, Tiffany A. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Ho, Clifford Kuofei

    2006-06-01

    Finite-element analyses were performed to simulate the response of a hypothetical masonry shear wall with and without continuous filament ties to various lateral loads. The loads represented three different scenarios: (1) 100 mph wind, (2) explosive attack, and (3) an earthquake. In addition, a static loading analysis and cost comparison were performed to evaluate optimal materials and designs for the spacers affixed to the filaments. Results showed that polypropylene, ABS, and polyethylene (high density) were suitable materials for the spacers based on performance and cost, and the short T-spacer design was optimal based on its performance and functionality. Results of the shear-wall loading simulations revealed that simulated walls with the continuous filament ties yielded factors of safety that were at least ten times greater than those without the ties. In the explosive attack simulation (100 psi), the simulated wall without the ties failed (minimum factor of safety was less than one), but the simulated wall with the ties yielded a minimum factor of safety greater than one. Simulations of the walls subject to lateral loads caused by 100 mph winds (0.2 psi) and seismic events with a peak ground acceleration of 1 ''g'' (0.66 psi) yielded no failures with or without the ties. Simulations of wall displacement during the seismic scenarios showed that the wall with the ties resulted in a maximum displacement that was 20% less than the wall without the ties.

  19. Strong Arcwise Connectedness

    OpenAIRE

    Espinoza, Benjamin; Gartside, Paul; Kovan-Bakan, Merve; Mamatelashvili, Ana

    2012-01-01

    A space is `n-strong arc connected' (n-sac) if for any n points in the space there is an arc in the space visiting them in order. A space is omega-strong arc connected (omega-sac) if it is n-sac for all n. We study these properties in finite graphs, regular continua, and rational continua. There are no 4-sac graphs, but there are 3-sac graphs and graphs which are 2-sac but not 3-sac. For every n there is an n-sac regular continuum, but no regular continuum is omega-sac. There is an omega-sac ...

  20. Abortion: Strong's counterexamples fail

    DEFF Research Database (Denmark)

    Di Nucci, Ezio

    2009-01-01

    This paper shows that the counterexamples proposed by Strong in 2008 in the Journal of Medical Ethics to Marquis's argument against abortion fail. Strong's basic idea is that there are cases--for example, terminally ill patients--where killing an adult human being is prima facie seriously morally......'s scenarios have some valuable future or admitted that killing them is not seriously morally wrong. Finally, if "valuable future" is interpreted as referring to objective standards, one ends up with implausible and unpalatable moral claims....

  1. Integrating Micro-level Interactions with Social Network Analysis in Tie Strength Research

    DEFF Research Database (Denmark)

    Torre, Osku; Gupta, Jayesh Prakash; Kärkkäinen, Hannu

    2017-01-01

    strength measurements may not reflect the true social connections of individuals accurately enough, and 2) many different methods to gather data from social media are not applicable anymore due to different data openness issues. In addition, we have only little empirical knowledge of the actual tie...... of tie strength based on reciprocal interaction from publicly available Facebook data, and suggest that this approach could work as a basis for further tie strength studies. Our approach makes use of weak tie theory, and enables researchers to study micro-level interactions (i.e. discussions, messages......, relationships) with large-scale social network analysis (SNA). This study provides a way to find relevant actors from publicly available data in the context of tie strengthening process, and answers how to take this stream of research closer to computational social science....

  2. Internationalization and Networks in Small and Medium-Sized Enterprises: the role of ethnic ties

    Directory of Open Access Journals (Sweden)

    Marco Antonio Seifriz

    2014-05-01

    Full Text Available The international insertion of small and medium-sized enterprises (SME has attracted academic attention with the emergence of new internationalization theories based on the network approach. There is evidence that social networks based on descent ties contribute to the international integration of firms, particularly small ones. The quantitative cross-sectional study conducted with 71 SME affiliated with the Business Association of Blumenau, city marked by German immigration, sought to test the predictive role of descent ties (content of ties and strength of ties in the degree of SME internationalization. The results suggest that only the strength of ties (frequency of contacts with the country of descent contributes to explaining the degree of internationalization. Limitations of sample size require caution in generalizing the results.

  3. Transnational Corporate Ties: A Synopsis of Theories and Empirical Findings

    Directory of Open Access Journals (Sweden)

    Michael Nollert

    2015-08-01

    Full Text Available In general, corporations are not isolated actors in an economic “war of all against all” but members of corporate networks of global reach. Although the literature on globalization emphasizes the increasing economic power of these networks and postulates the formation of a transnational capitalist class, there is still a lack of empirical findings. The article starts with a review of theoretical perspectives (resource dependence, social capital, coordination of markets, financial hegemony, class hegemony, inner circle, and transnational capitalist class which focuses on the functions and structures of corporate interlocks at the national and the transnational level. The subsequent section offers an outline of empirical studies concerning transnational corporate networks. These analyses of corporate ties (interlocking directorates, financial participations and policy group affiliations suggest the emergence of transnational economic elites whose members, however, have not lost their national identity. In the final section, the theoretical perspectives will be assessed and some prospects are sketched out. Finally, it will be argued that the disintegration of the world society, which is considerably driven by rent-seeking corporate networks, can only be restrained if a potential global regulatory agency will be anchored in a post-Washington consensus.

  4. Tying Pulsar Timing in Radio and X-ray

    Science.gov (United States)

    Majid, W.

    2017-10-01

    Millisecond pulsars are a class of radio pulsars with extremely stable rotations. The excellent timing stability of millisecond pulsars can be used to study a wide variety of astrophysical phenomena in both radio and X-ray. We have developed a precision pulsar timing capability at NASA's Deep Space Network (DSN), which is deployed on large 70-m dishes. This program is now capable of producing precision pulsar timing of a large number of millisecond pulsars in radio. Often though there is a need to tie the pulse profiles of pulsars from radio to shorter wavelengths, for instance in X-ray timing campaigns. This poses special challenges that include the knowledge of absolute time in both detectors, pulse profile frequency evolution, dispersion measure monitoring, and systematic offsets across the frequency spectrum. We have recently initiated a high cadence timing program of the Crab pulsar to provide essential timing ephemerides for NASA's NICER mission. In this presentation, we will describe some of the challenges, including some early results of this campaign. This research was performed at the Jet Propulsion Laboratory, California Institute of Technology, under the Research and Technology Development Program, under a contract with the National Aeronautics and Space Administration.

  5. Tying dark matter to baryons with self-interactions.

    Science.gov (United States)

    Kaplinghat, Manoj; Keeley, Ryan E; Linden, Tim; Yu, Hai-Bo

    2014-07-11

    Self-interacting dark matter (SIDM) models have been proposed to solve the small-scale issues with the collisionless cold dark matter paradigm. We derive equilibrium solutions in these SIDM models for the dark matter halo density profile including the gravitational potential of both baryons and dark matter. Self-interactions drive dark matter to be isothermal and this ties the core sizes and shapes of dark matter halos to the spatial distribution of the stars, a radical departure from previous expectations and from cold dark matter predictions. Compared to predictions of SIDM-only simulations, the core sizes are smaller and the core densities are higher, with the largest effects in baryon-dominated galaxies. As an example, we find a core size around 0.3 kpc for dark matter in the Milky Way, more than an order of magnitude smaller than the core size from SIDM-only simulations, which has important implications for indirect searches of SIDM candidates.

  6. Design of Compact Trapezoidal Bow-Tie Chipless RFID Tag

    Directory of Open Access Journals (Sweden)

    Lei Xu

    2015-01-01

    Full Text Available This paper presents a novel compact design of a low cost fully printable slot-loaded bowtie chipless RFID tag. The tag consists of two trapezoidal metallic patches loaded with multiple slot resonators. Slots with similar size or adjacent frequencies are loaded alternately on two bow-tie patches to double the number of data bits within the UWB frequency band without increasing the mutual coupling between slots. A coding capacity of 12 bits is obtained with 12 slots within a reasonable size of 35 mm × 33 mm. RCS of the tag has been given by simulation. Measurements have been done using a bistatic radar configuration in the frequency domain and transmission coefficient is measured. The agreement between the simulation and measurement validates this new concept of design. This tag has high data capacity and low cost and can be directly printed on product such as personal ID, credit cards, paper, and textile because it needs only one conductive layer.

  7. A strong comeback

    International Nuclear Information System (INIS)

    Marier, D.

    1992-01-01

    This article presents the results of a financial rankings survey which show a strong economic activity in the independent energy industry. The topics of the article include advisor turnover, overseas banks, and the increase in public offerings. The article identifies the top project finance investors for new projects and restructurings and rankings for lenders

  8. Culture Clash or Ties That Bind? What Australian Academics Think of Professional Staff

    Science.gov (United States)

    Gray, Stephen

    2015-01-01

    This paper uses a framework analysis to explore the opinions a cohort of Australian academic staff hold towards professional staff. Five indicative themes were identified from the extant literature on university professional staff: the professional other; managerialism; an expensive bureaucracy; complementary agendas; and the third space and…

  9. Can space ties on board GNSS satellites replace terrestrial ties in the implementation of Terrestrial Reference Frames?

    Science.gov (United States)

    Bruni, Sara; Zerbini, Susanna; Altamimi, Zuheir; Rebischung, Paul; Errico, Maddalena; Santi, Efisio

    2016-04-01

    SLR techniques via the so-called space ties, instead of relying on the terrestrial ties evaluated with ground measurement campaigns at co-located ITRF sites.

  10. Cross-Cultural Impression Management: A Cultural Knowledge Audit Model

    Science.gov (United States)

    Spong, Abigail; Kamau, Caroline

    2012-01-01

    Purpose: Many people moving into a new culture for work or study do so without prior cross-cultural training, yet successful cultural adaptation has important ramifications. The purpose of this paper is to focus on cross-cultural impression management as an element of cultural adaptation. Does cultural adaptation begin by paying strong attention…

  11. A Bibliometric Study on Culture Research in International Business

    OpenAIRE

    Pinto, Claudia Frias; Serra, Fernando Ribeiro; Ferreira, Manuel Portugal

    2014-01-01

    National cultures and cultural differences provide a crucial component of the international business (IB) research context. We conducted a bibliometric study of articles published in seven leading IB journals over a period of three decades to analyze how national culture has been impacting IB research. Co-citation mappings permit us to identify the ties binding works dealing with culture and cultural issues in IB. We identify two main clusters of research, each comprising two ...

  12. Strong Electroweak Symmetry Breaking

    CERN Document Server

    Grinstein, Benjamin

    2011-01-01

    Models of spontaneous breaking of electroweak symmetry by a strong interaction do not have fine tuning/hierarchy problem. They are conceptually elegant and use the only mechanism of spontaneous breaking of a gauge symmetry that is known to occur in nature. The simplest model, minimal technicolor with extended technicolor interactions, is appealing because one can calculate by scaling up from QCD. But it is ruled out on many counts: inappropriately low quark and lepton masses (or excessive FCNC), bad electroweak data fits, light scalar and vector states, etc. However, nature may not choose the minimal model and then we are stuck: except possibly through lattice simulations, we are unable to compute and test the models. In the LHC era it therefore makes sense to abandon specific models (of strong EW breaking) and concentrate on generic features that may indicate discovery. The Technicolor Straw Man is not a model but a parametrized search strategy inspired by a remarkable generic feature of walking technicolor,...

  13. Plasmons in strong superconductors

    International Nuclear Information System (INIS)

    Baldo, M.; Ducoin, C.

    2011-01-01

    We present a study of the possible plasmon excitations that can occur in systems where strong superconductivity is present. In these systems the plasmon energy is comparable to or smaller than the pairing gap. As a prototype of these systems we consider the proton component of Neutron Star matter just below the crust when electron screening is not taken into account. For the realistic case we consider in detail the different aspects of the elementary excitations when the proton, electron components are considered within the Random-Phase Approximation generalized to the superfluid case, while the influence of the neutron component is considered only at qualitative level. Electron screening plays a major role in modifying the proton spectrum and spectral function. At the same time the electron plasmon is strongly modified and damped by the indirect coupling with the superfluid proton component, even at moderately low values of the gap. The excitation spectrum shows the interplay of the different components and their relevance for each excitation modes. The results are relevant for neutrino physics and thermodynamical processes in neutron stars. If electron screening is neglected, the spectral properties of the proton component show some resemblance with the physical situation in high-T c superconductors, and we briefly discuss similarities and differences in this connection. In a general prospect, the results of the study emphasize the role of Coulomb interaction in strong superconductors.

  14. Tongue-tie and breastfeeding in newborns-mothers' perspective.

    Science.gov (United States)

    Riskin, Arieh; Mansovsky, Michal; Coler-Botzer, Tzviya; Kugelman, Amir; Shaoul, Ron; Hemo, Miri; Wolff, Leslie; Harpaz, Sarit; Olchov, Zhana; Bader, David

    2014-11-01

    This study explored clinical implications of tongue-tie (TT) on breastfeeding from the mothers' perspective and evaluated the assistance provided. This was a single-center observational study using a structured survey. All newborns with TT born in 2005-2010 were identified; two controls without TT were assigned for each. Mothers were interviewed using a uniform structured questionnaire regarding breastfeeding experience, challenges, lactation consultation, and frenotomy, if performed. One hundred eighty-three TT mothers and 314 controls were interviewed. Although the overall rates of breastfeeding problems in the first month were similar (59% vs. 52%, respectively), TT mothers reported significantly more problems with latching, prolonged breastfeeding, and infant's exhaustion during feedings, but not pain or sore nipples. Breastfeeding rates at 6 months were similar. TT mothers more frequently used pumped breastmilk to supplement breastfeeding. Significantly more TT mothers sought consultation after discharge, and a significantly greater proportion of them felt that lactation consultation helped. Eighty-seven percent of the mothers were aware of their children's TT, yet only 50% associated it with breastfeeding problems. Of the TT infants at 2 years of age or older, 11.9% were reported to have speech problems. The possibility of frenotomy was mentioned to 69% of mothers, and it was performed in 35% of cases. Procedure satisfaction was generally poor, except for when done to solve breastfeeding problems. TT infants had significantly more breastfeeding problems in the first month, but similar rates and durations of breastfeeding. Early diagnosis and lactation consultation may assist mother-infant dyads substantially. Mothers whose infants underwent frenotomies for breastfeeding more frequently found the procedure alleviated breastfeeding problems.

  15. Breastfeeding difficulties and oral cavity anomalies: The influence of posterior ankyloglossia and upper-lip ties.

    Science.gov (United States)

    Pransky, Seth M; Lago, Denise; Hong, Paul

    2015-10-01

    Oral cavity anomalies may contribute to breastfeeding problems. The objective of this study was to describe our experience in a high-volume breastfeeding difficulty clinic with a focus on posterior ankyloglossia and upper-lip ties. A retrospective review of patients from a dedicated breastfeeding difficulty clinic from January 2014 to December 2014 was performed. Those identified to have ankyloglossia and/or upper-lip ties underwent release procedures. Subjective breastfeeding changes were documented afterwards. Of the 618 total patients, 290 (47%) had anterior ankyloglossia, 120 (19%) had posterior ankyloglossia, and 14 (2%) had upper-lip tie. Some patients had both anterior ankyloglossia and upper lip-tie (6%), or posterior ankyloglossia and upper-lip tie (5%). For those with anterior ankyloglossia, 78% reported some degree of improvement in breastfeeding after frenotomy. For those with posterior ankyloglossia, 91% reported some degree of improvement in breastfeeding after frenotomy. Upper lip-tie release also led to improved breastfeeding (100%). Anterior and posterior ankyloglossia and upper-lip tie, or combinations thereof, were commonly recognized in our study population. Many newborns, however, also had no oral cavity anomalies. Although causation cannot be implied, these oral cavity anomalies may contribute to breastfeeding difficulties in some cases. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

  16. IVF, same-sex couples and the value of biological ties

    DEFF Research Database (Denmark)

    Di Nucci, Ezio

    2016-01-01

    Ought parents, in general, to value being biologically tied to their children? Is it important, in particular, that both parents be biologically tied to their children? I will address these fundamental questions by looking at a fairly new practice within IVF treatments, so-called IVF-with-ROPA (R......Ought parents, in general, to value being biologically tied to their children? Is it important, in particular, that both parents be biologically tied to their children? I will address these fundamental questions by looking at a fairly new practice within IVF treatments, so-called IVF......-with-ROPA (Reception of Oocytes from Partner), which allows lesbian couples to 'share motherhood', with one partner providing the eggs while the other becomes pregnant. I believe that IVF-with-ROPA is, just like other IVF treatments, morally permissible, but here I argue that the increased biological ties which IVF......-with-ROPA allows for do not have any particular value beside the satisfaction of a legitimate wish, because there is no intrinsic value in a biological tie between parents and children; further, I argue that equality within parental projects cannot be achieved by redistributing biological ties....

  17. Recovery From Radiation-induced Bone Marrow Damage by HSP25 Through Tie2 Signaling

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Hae-June [Division of Radiation Effects, Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Kwon, Hee-Chung [Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Chung, Hee-Yong [College of Medicine, Hanyang University, Seoul (Korea, Republic of); Lee, Yoon-Jin [Division of Radiation Effects, Korea Institute of Radiological and Medical Sciences, Seoul (Korea, Republic of); Lee, Yun-Sil, E-mail: yslee0425@ewha.ac.kr [College of Pharmacy and Division of Life and Pharmaceutical Sciences, Ewha Woman' s University, Seoul (Korea, Republic of)

    2012-09-01

    Purpose: Whole-body radiation therapy can cause severe injury to the hematopoietic system, and therefore it is necessary to identify a novel strategy for overcoming this injury. Methods and Materials: Mice were irradiated with 4.5 Gy after heat shock protein 25 (HSP25) gene transfer using an adenoviral vector. Then, peripheral blood cell counts, histopathological analysis, and Western blotting on bone marrow (BM) cells were performed. The interaction of HSP25 with Tie2 was investigated with mouse OP9 and human BM-derived mesenchymal stem cells to determine the mechanism of HSP25 in the hematopoietic system. Results: HSP25 transfer increased BM regeneration and reduced apoptosis following whole-body exposure to ionizing radiation (IR). The decrease in Tie2 protein expression that followed irradiation of the BM was blocked by HSP25 transfer, and Tie2-positive cells were more abundant among the BM cells of HSP25-transferred mice, even after IR exposure. Following systemic RNA interference of Tie2 before IR, HSP25-mediated radioprotective effects were partially blocked in both mice and cell line systems. Stability of Tie2 was increased by HSP25, a response mediated by the interaction of HSP25 with Tie2. IR-induced tyrosine phosphorylation of Tie2 was augmented by HSP25 overexpression; downstream events in the Tie2 signaling pathway, including phosphorylation of AKT and EKR1/2, were also activated. Conclusions: HSP25 protects against radiation-induced BM damage by interacting with and stabilizing Tie2. This may be a novel strategy for HSP25-mediated radioprotection in BM.

  18. Strong-coupling approximations

    International Nuclear Information System (INIS)

    Abbott, R.B.

    1984-03-01

    Standard path-integral techniques such as instanton calculations give good answers for weak-coupling problems, but become unreliable for strong-coupling. Here we consider a method of replacing the original potential by a suitably chosen harmonic oscillator potential. Physically this is motivated by the fact that potential barriers below the level of the ground-state energy of a quantum-mechanical system have little effect. Numerically, results are good, both for quantum-mechanical problems and for massive phi 4 field theory in 1 + 1 dimensions. 9 references, 6 figures

  19. Strong interaction and QFD

    International Nuclear Information System (INIS)

    Ebata, T.

    1981-01-01

    With an assumed weak multiplet structure for bosonic hadrons, which is consistent with the ΔI = 1/2 rule, it is shown that the strong interaction effective hamiltonian is compatible with the weak SU(2) x U(1) gauge transformation. Especially the rho-meson transforms as a triplet under SU(2)sub(w), and this is the origin of the rho-photon analogy. It is also shown that the existence of the non-vanishing Cabibbo angle is a necessary condition for the absence of the exotic hadrons. (orig.)

  20. Escapist Motives for On-line Gaming and Strengthening of Weak Ties

    DEFF Research Database (Denmark)

    Sudzina, Frantisek; Razmerita, Liana

    Due to advances of technology including faster and ubiquitously accessible Internet connection, on-line gaming have grown tremendously in the last couple of years. The aim of this paper is to investigate whether escapist motives for playing games are linked to strengthening of weak ties through on-line...... gaming. The research investigates Facebook and other on-line games separately. A surprising result is that while most of the investigated escapist motives are positively correlated with strengthening of weak ties, the mundane breaking motive is negatively correlated with strengthening of weak ties....

  1. The Role of Social Ties in Word-of-Mouth Effectiveness

    DEFF Research Database (Denmark)

    Martensen, Anne Duhr; Grønholdt, Lars

    2015-01-01

    This article develops consumer segmentation based on the strength of social ties in word-of-mouth (WOM) communication and examines the influence of WOM on behavioral attitude and intention in these segments. Data were collected through a survey among receivers of retail banking WOM. A cluster...... analysis identifies four WOM receiver segments based on the tie strength between the sender and the receiver, and the cluster solution is successfully validated. Each segment shows distinct patterns of tie strength and influence on the receiver’s perception of WOM, behavioral attitude and intention....... Moreover, the WOM influence is examined for customers as well as non-customers....

  2. Square and bow-tie configurations in the cyclic evasion problem

    Science.gov (United States)

    Arnold, M. D.; Golich, M.; Grim, A.; Vargas, L.; Zharnitsky, V.

    2017-05-01

    Cyclic evasion of four agents on the plane is considered. There are two stationary shapes of configurations: square and degenerate bow-tie. The bow-tie is asymptotically attracting while the square is of focus-center type. Normal form analysis shows that square is nonlinearly unstable. The stable manifold consists of parallelograms that all converge to the square configuration. Based on these observations and numerical simulations, it is conjectured that any non-parallelogram non-degenerate configuration converges to the bow-tie.

  3. Escapist Motives for On-line Gaming and Strengthening of Weak Ties

    DEFF Research Database (Denmark)

    Sudzina, Frantisek; Razmerita, Liana

    Due to advances of technology including faster and ubiquitously accessible Internet connection, on-line gaming have grown tremendously in the last couple of years. The aim of this paper is to investigate whether escapist motives for playing games are linked to strengthening of weak ties through on......-line gaming. The research investigates Facebook and other on-line games separately. A surprising result is that while most of the investigated escapist motives are positively correlated with strengthening of weak ties, the mundane breaking motive is negatively correlated with strengthening of weak ties....

  4. Strong Coupling Holography

    CERN Document Server

    Dvali, Gia

    2009-01-01

    We show that whenever a 4-dimensional theory with N particle species emerges as a consistent low energy description of a 3-brane embedded in an asymptotically-flat (4+d)-dimensional space, the holographic scale of high-dimensional gravity sets the strong coupling scale of the 4D theory. This connection persists in the limit in which gravity can be consistently decoupled. We demonstrate this effect for orbifold planes, as well as for the solitonic branes and string theoretic D-branes. In all cases the emergence of a 4D strong coupling scale from bulk holography is a persistent phenomenon. The effect turns out to be insensitive even to such extreme deformations of the brane action that seemingly shield 4D theory from the bulk gravity effects. A well understood example of such deformation is given by large 4D Einstein term in the 3-brane action, which is known to suppress the strength of 5D gravity at short distances and change the 5D Newton's law into the four-dimensional one. Nevertheless, we observe that the ...

  5. 78 FR 57619 - Prestressed Concrete Steel Rail Tie Wire From Mexico, Thailand, and the People's Republic of...

    Science.gov (United States)

    2013-09-19

    ...] Prestressed Concrete Steel Rail Tie Wire From Mexico, Thailand, and the People's Republic of China... prestressed concrete steel rail tie wire from Mexico, Thailand, and the People's Republic of China. See Prestressed Concrete Steel Rail Tie Wire From Mexico, the People's Republic of China, and Thailand: Initiation...

  6. LIGO: The strong belief

    CERN Multimedia

    Antonella Del Rosso

    2016-01-01

    Twenty years of designing, building and testing a number of innovative technologies, with the strong belief that the endeavour would lead to a historic breakthrough. The Bulletin publishes an abstract of the Courier’s interview with Barry Barish, one of the founding fathers of LIGO.   The plots show the signals of gravitational waves detected by the twin LIGO observatories at Livingston, Louisiana, and Hanford, Washington. (Image: Caltech/MIT/LIGO Lab) On 11 February, the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo collaborations published a historic paper in which they showed a gravitational signal emitted by the merger of two black holes. These results come after 20 years of hard work by a large collaboration of scientists operating the two LIGO observatories in the US. Barry Barish, Linde Professor of Physics, Emeritus at the California Institute of Technology and former Director of the Global Design Effort for the Internat...

  7. Moving with the Military: Race, Class, and Gender Differences in the Employment Consequences of Tied Migration

    National Research Council Canada - National Science Library

    Cooney, Richard

    2003-01-01

    .... Previous research demonstrates negative employment and earnings consequences for tied migrants, but little is known about how the impact of such mobility differs by the gender, race, and class of the trailing spouse. The U.S...

  8. Fiber Optic Tamper Indicating Enclosure (TIE); A Case Study in Authentication

    Energy Technology Data Exchange (ETDEWEB)

    Anheier, Norman C.; Benz, Jacob M.; Tanner, Jennifer E.; Westman, Matthew P.

    2015-07-15

    A robust fiber optic-based tamper-indicating enclosure (TIE) has been developed by PNNL through funding by the National Nuclear Security Administration Office of Nuclear Verification over the past few years. The objective of this work is to allow monitors to have confidence in both the authenticity and integrity of the TIE and the monitoring equipment inside, throughout the time it may be located at a host facility. Incorporating authentication features into the design were the focus of fiscal year 2014 development efforts. Throughout the development process, modifications have been made to the physical TIE design based on lessons learned via exercises and expert elicitation. The end result is a robust and passive TIE which can be utilized to protect monitoring party equipment left in a host facility.

  9. Text Information Extraction System (TIES) | Informatics Technology for Cancer Research (ITCR)

    Science.gov (United States)

    TIES is a service based software system for acquiring, deidentifying, and processing clinical text reports using natural language processing, and also for querying, sharing and using this data to foster tissue and image based research, within and between institutions.

  10. Internal fixation of fractured ribs in neonatal foals with nylon cable tie using a modified technique.

    Science.gov (United States)

    Williams, T Boullhesen; Williams, Jarred M; Rodgerson, Dwayne H

    2017-06-01

    Nylon cable tie has been shown to be an effective and economical method for fixing fractured ribs in the neonatal foal. This article describes a modification of the previously described technique. Under general anesthesia, the fractured ribs were exposed and a hole was drilled in the dorsal and ventral fragments. The fracture was not reduced, leaving the fragments overriding each other. The nylon cable tie was passed through the hole in the dorsal fragment from the external surface of the rib. The free end of the cable tie was then passed through the hole in the ventral fragment from the external surface of the rib and the tie was tightened. This technique was used in 4 neonatal foals with no complications. The modification of the original technique represents a method to minimize soft tissue trauma, implant failure, and complications.

  11. One long tie bar broken after 3 days because of hydrogen contamination.

    CERN Multimedia

    H. Gerwig

    2000-01-01

    The tie bars have been produced with a high yield strength. As known for these type of high strength bolts, and hydrogen contamination during manufacture or heat treatment could lead to rupture under stress after several days.

  12. ParTIES: a toolbox for Paramecium interspersed DNA elimination studies.

    Science.gov (United States)

    Denby Wilkes, Cyril; Arnaiz, Olivier; Sperling, Linda

    2016-02-15

    Developmental DNA elimination occurs in a wide variety of multicellular organisms, but ciliates are the only single-celled eukaryotes in which this phenomenon has been reported. Despite considerable interest in ciliates as models for DNA elimination, no standard methods for identification and characterization of the eliminated sequences are currently available. We present the Paramecium Toolbox for Interspersed DNA Elimination Studies (ParTIES), designed for Paramecium species, that (i) identifies eliminated sequences, (ii) measures their presence in a sequencing sample and (iii) detects rare elimination polymorphisms. ParTIES is multi-threaded Perl software available at https://github.com/oarnaiz/ParTIES. ParTIES is distributed under the GNU General Public Licence v3. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  13. Do Social Ties Affect Our Health? Exploring the Biology of Relationships

    Science.gov (United States)

    ... Do Social Ties Affect Our Health? Exploring the Biology of Relationships En español Send us your comments ... neighbors, or others, social connections can influence our biology and well-being. Wide-ranging research suggests that ...

  14. The effects of emitter-tied field plates on lateral PNP ionizing radiation response

    International Nuclear Information System (INIS)

    Barnaby, H.J.; Schrimpf, R.D.; Cirba, C.R.; Pease, R.L.; Fleetwood, D.M.; Kosier, S.L.

    1998-03-01

    Radiation response comparisons of lateral PNP bipolar technologies reveal that device hardening may be achieved by extending the emitter contact over the active base. The emitter-tied field plate suppresses recombination of carriers with interface traps

  15. Determination of the local ties dynamics on colocation site Simeiz-Katsyveli

    Science.gov (United States)

    Bolotina, O. V.; Samoilenko, O. M.; Bolotin, S. L.; Lytvyn, M. O.; Kozel, V. L.

    2007-12-01

    Geodetic ties between VLBI, SLR and GPS observatories at Simeiz-Katsyveli are analysed. The differencies between the geodetic and UTRF2000 coordinates are given. Repeatability of the results are investigated.

  16. Organised Cultural Encounters

    DEFF Research Database (Denmark)

    Christiansen, Lene Bull; Galal, Lise Paulsen; Hvenegård-Lassen, Kirsten

    2017-01-01

    The article introduces the special issue by presenting the concept of organised cultural encounters that are encounters organised to manage and/or transform problems perceived to originate in or include cultural differences. Inspired by Pratt’s conceptualisation of the contact zone, a critical...... perspective on the particular historical and spatial context of any encounter and how this context frames and mediates what takes place during an encounter is applied. While the articles of the issue present different varieties of organised cultural encounters, it is argued that they are not only of the same...... kind because of our analytical framework, but also because they share various features. They are scripted events tied to the particular social arena with which the encounter is associated and thus shaped in important ways by the existing norms, discourses, roles and hierarchies that govern these arenas...

  17. Angiopoietins regulate vascular reactivity after haemorrhagic shock in rats through the Tie2-nitric oxide pathway.

    Science.gov (United States)

    Xu, Jing; Lan, Dan; Li, Tao; Yang, Guangming; Liu, Liangming

    2012-11-01

    Vascular reactivity shows biphasic changes after severe trauma or shock. Our aim was to elucidate the mechanisms of biphasic-changed vascular reactivity after haemorrhagic shock by observing the regulation of angiopoietin-1 (Ang-1) and angiopoietin-2 (Ang-2) on it. Haemorrhagic-shock Sprague-Dawley rats, hypoxia-treated superior mesenteric arteries (SMAs) with intact endothelia, and a cell mixture of vascular smooth muscle cells (VSMCs) and vascular endothelial cells (VECs) were adopted to evaluate the regulatory effects of Ang-1 and Ang-2 on vascular reactivity and their relationship to Tie2 (receptor tyrosine kinase)-Akt-endothelial nitric oxide synthase (eNOS) and Tie2-extracellular signal-regulated kinase (Erk)-inducible nitric oxide synthase (iNOS) signal pathways. Ang-1 expression, Tie2 phosphorylation, and nitric oxide (NO) release were increased at early shock. Exogenous Ang-1 maintained the vascular reactivity of SMAs after early hypoxia. Tie2-blocking antibody and the antagonists of Akt and eNOS antagonized Ang-1-induced maintenance in vascular reactivity and a slight release in NO at the early stage of shock. Ang-2 expression, Tie2 phosphorylation, and NO release were greatly increased at late shock, but exogenous Ang-2 further decreased the vascular reactivity of SMAs after late hypoxia. Tie2-blocking antibody and the antagonists of Erk and iNOS andtagonized the Ang-2-induced decrease in vascular reactivity and a large release of NO at the late stage of shock. Ang-1 and Ang-2 participated in the regulation of vascular reactivity after haemorrhagic shock. Ang-1 was mainly responsible for the hyperreactivity at early shock through the Tie2-Akt-eNOS pathway and an appropriate amount of NO release. Ang-2 was mainly responsible for the hyporeactivity at late shock through the Tie2-Erk-iNOS pathway and the release of a large amount of NO.

  18. Measurement and Analysis of Strains Developed on Tie-rods of a Steering System

    OpenAIRE

    Asenov, Stefan

    2016-01-01

    Modern day manufacturers research and develop vehicles that are equipped with steering assist to help drivers undertake manoeuvres. However the lack of research for a situation where one tie-rod experiences different strains than the opposite one leads to failure in the tie-rod assembly and misalignment in the wheels over time. The performance of the steering system would be improved if this information existed. This bachelor’s dissertation looks into this specific situation and cond...

  19. A longitudinal analysis of cross-border ties and depression for Latino adults.

    Science.gov (United States)

    Torres, Jacqueline M; Lee, Anne; González, Hector M; Garcia, Lorena; Haan, Mary N

    2016-07-01

    Recent scholarship suggests a significant association between cross-border ties, or ties maintained with family and friends in countries and communities of origin, and the mental health of immigrants and their descendants. To date, this research has been exclusively cross-sectional, precluding conclusions about a causal association between cross-border ties and mental health outcomes. In the present study we undertake a longitudinal analysis of the relationship between cross-border ties and depression measured over a ten-year period for a sample of immigrant and U.S.-born Latinos. Data are from the Sacramento Area Latino Study on Aging (1998-2008), a population-based, prospective study of Latin American-origin adults 60 years and older. We find that cross-border ties reported at baseline were significantly associated with depression in subsequent study waves, even after controlling for the presence of depression at baseline, albeit with substantial differences by gender and nativity. Specifically, communication with family and friends in Latin America and travel to Latin America at baseline were each significantly associated with greater odds of depression for immigrant women, but with lower odds of depression for U.S.-born Latina women over the study period. Travel to Latin America at baseline was significantly associated with lower odds of depression for Latino men across the study. Across all models we control for depressive symptomatology at baseline to account for the reciprocal nature of depressive symptoms and engagement with social ties, including cross-border ties. Our findings suggest that cross-border ties may represent a unique source of both resilience and risk for the long-term mental health of immigrant Latinos and their descendants. Copyright © 2016 Elsevier Ltd. All rights reserved.

  20. Sister-to-sister oocyte donation: couples’ experiences with regard to genetic ties

    OpenAIRE

    WYVERKENS, ELIA; Van Parys, Hanna; Provoost, Veerle; Pennings, Guido; De Sutter, Petra; Buysse, Ann

    2016-01-01

    Objective: This study aimed to gain an in-depth understanding of the experiences of genetic ties in intrafamily oocyte donation families. Background: Previous research has shown that most mothers have a good and stable relationship with their donor. Little is known about the meaning of the difference in genetic ties for parents who conceived through sister-to-sister oocyte donation. Methods: An Interpretative Phenomenological Analysis was performed and focused on both individual experie...

  1. Division of tongue tie: review of practice through a tertiary paediatric otorhinolaryngology service.

    LENUS (Irish Health Repository)

    Glynn, R W

    2012-10-01

    Recent NICE guidance declared that evidence regarding surgical division of tongue tie was adequate to support the use of the procedure, provided that normal arrangements are in place for consent, audit and clinical governance. This work aimed to carry out a retrospective review of those patients who have previously undergone tongue tie division through a tertiary paediatric otorhinolaryngology service. We further aimed to identify the referral patterns, indications for, and outcomes following, division.

  2. Social ties and risk for cancer--a prospective cohort study

    DEFF Research Database (Denmark)

    Bergelt, Corinna; Prescott, Eva; Grønbaek, Morten

    2009-01-01

    Poor social support and small social networks have been associated with increased risks for conditions such as coronary heart disease as well as with overall mortality. We investigated the association between social ties and risk for cancer.......Poor social support and small social networks have been associated with increased risks for conditions such as coronary heart disease as well as with overall mortality. We investigated the association between social ties and risk for cancer....

  3. Quasinormal Modes and Strong Cosmic Censorship

    Science.gov (United States)

    Cardoso, Vitor; Costa, João L.; Destounis, Kyriakos; Hintz, Peter; Jansen, Aron

    2018-01-01

    The fate of Cauchy horizons, such as those found inside charged black holes, is intrinsically connected to the decay of small perturbations exterior to the event horizon. As such, the validity of the strong cosmic censorship (SCC) conjecture is tied to how effectively the exterior damps fluctuations. Here, we study massless scalar fields in the exterior of Reissner-Nordström-de Sitter black holes. Their decay rates are governed by quasinormal modes of the black hole. We identify three families of modes in these spacetimes: one directly linked to the photon sphere, well described by standard WKB-type tools; another family whose existence and time scale is closely related to the de Sitter horizon; finally, a third family which dominates for near-extremally charged black holes and which is also present in asymptotically flat spacetimes. The last two families of modes seem to have gone unnoticed in the literature. We give a detailed description of linear scalar perturbations of such black holes, and conjecture that SCC is violated in the near extremal regime.

  4. Noteworthy: Fortune 500: Texas ties California for national lead

    OpenAIRE

    Michael Nicholson

    2010-01-01

    According to the 2010 Fortune 500, released in April, Texas hosts the headquarters of 57 of the nation's 500 largest companies, ranked by gross revenues. Texas secured its place as a Fortune 500 leader through its position as focal point of the domestic energy industry, its relatively strong economic growth over the past decade, and its relatively low tax rates and living costs.

  5. Multi-purpose grid-tied inverter with smart grid capabilities

    Science.gov (United States)

    Liyanagedera, Chamika Mihiranga

    Distributed energy storages play an important role in increasing the reliability and efficiency of the grid through means of peak load shaving, grid voltage support, and grid frequency support. It is important to have distributed energy storages that can utilize the functionalities of the modern smart grid to operate more effectively. The grid-tied inverter is one of the major components in a distributed energy storage that controls the power transfer between the grid and an energy storage device. In this research, a grid-tied inverter that can be used in distributed energy storage applications was designed, developed, and tested. This grid-tied inverter was designed with the capability to control both reactive and active power flow in either direction. The grid-tied inverter is equipped with communication capabilities so it can be remotely controlled by commands sent through a smart grid network. For demonstrative purposes, a user interface was developed to control and monitor the operation of the grid-tied inverter. Finally the operation of the grid-tied inverter was evaluated in accordance to IEEE 1547, the Standard for Interconnecting Distributed Resources with Electric Power Systems.

  6. Relationships between authorship contributions and authors' industry financial ties among oncology clinical trials.

    Science.gov (United States)

    Rose, Susannah L; Krzyzanowska, Monika K; Joffe, Steven

    2010-03-10

    PURPOSE To test the hypothesis that authors who play key scientific roles in oncology clinical trials, and who therefore have increased influence over the design, analysis, interpretation or reporting of trials, are more likely than those who do not play such roles to have financial ties to industry. METHODS Data were abstracted from all trials (n = 235) of drugs or biologic agents published in the Journal of Clinical Oncology between January 1, 2006 and June 30, 2007. Article-level data included sponsorship, age group (adult v pediatric), phase, single versus multicenter, country (United States v other), and number of authors. Author-level data (n = 2,927) included financial ties (eg, employment, consulting) and performance of key scientific roles (ie, conception/design, analysis/interpretation, or manuscript writing). Associations between performance of key roles and financial ties, adjusting for article-level covariates, were examined using generalized linear mixed models. Results One thousand eight hundred eighty-one authors (64%) reported performing at least one key role, and 842 authors (29%) reported at least one financial tie. Authors who reported performing a key role were more likely than other authors to report financial ties to industry (adjusted odds ratio [OR], 4.3; 99% CI, 3.0 to 6.0; P reporting of oncology clinical trials are more likely than authors who do not perform such roles to have financial ties to industry.

  7. Single port intra-gastric full thickness resection: Using "Rotation and Revolution Single Instrument Tie (RRSIT)".

    Science.gov (United States)

    Kim, Ho Goon; Ryu, Seong Yeob; Kim, Dong Yi

    2014-09-01

    Recently, minimize incisions has led to a reduction in the number of ports, and has led to transumbilical single-port surgery. We evaluated the treatment result of single-port, intragastric, full thickness resections for gastric SMTs. In addition, we introduce a novel intracorporeal knot tying method. From August 2010 to March 2011, five patients underwent single-port intragastric, full thickness gastric wedge resections. After performing a gastrostomy, a single port was inserted into the stomach. After full thickness resection, the defect in the gastric wall was sutured by full thickness interrupted suture and a new knot tying technique. The mean operative time was 129 ± 21.0 min and the mean mass size was 3.0±0.6 cm. There were two very low-risk GISTs, 2 leiomyomas, and 1 carcinoid. The post-operative course was uneventful in all patients. The mean hospital stay was 7.2±1.2 days. Single-port intra-gastric full thickness resection with novel intracorporeal knot tying method is feasible and safe. novel intracorporeal knot tying method is a very useful knot tying method. We expect the application of novel intracorporeal knot tying method to be diverse and broad.

  8. Ipsilateral deficits in 1-handed shoe tying after left or right hemisphere stroke.

    Science.gov (United States)

    Poole, Janet L; Sadek, Joseph; Haaland, Kathleen Y

    2009-10-01

    Poole JL, Sadek J, Haaland KY. Ipsilateral deficits in 1-handed shoe tying after left or right hemisphere stroke. To examine 1-handed shoe tying performance and whether cognitive deficits more associated with left or right hemisphere damage differentially affect it after unilateral stroke. Observational cohort comparing ipsilesional shoe tying, spatial and language skills, and limb praxis. Primary care Veterans Affairs and private medical center. Not applicable. Volunteer right-handed sample of adults with left or right hemisphere damage and healthy demographically matched adults. The number of correct trials and the total time to complete 10 trials tying a shoe using the 1-handed method. Both stroke groups had fewer correct trials and were significantly slower tying the shoe than the control group. Spatial skills predicted accuracy and speed after right hemisphere damage. After left hemisphere damage, accuracy was predicted by spatial skills and limb praxis, while speed was predicted by limb praxis only. Ipsilesional shoe tying is similarly impaired after left or right hemisphere damage, but for different reasons. Spatial deficits had a greater influence after right hemisphere damage, and limb apraxia had a greater influence after left hemisphere damage. Language deficits did not affect performance, indicating that aphasia does not preclude using this therapy approach. These results suggest that rehabilitation professionals should consider assessment of limb apraxia and ipsilesional skill training in the performance of everyday tasks.

  9. John Strong (1941 - 2006)

    CERN Multimedia

    Wickens, F

    Our friend and colleague John Strong was cruelly taken from us by a brain tumour on Monday 31st July, a few days before his 65th birthday John started his career working with a group from Westfield College, under the leadership of Ted Bellamy. He obtained his PhD and spent the early part of his career on experiments at Rutherford Appleton Laboratory (RAL), but after the early 1970s his research was focussed on experiments in CERN. Over the years he made a number of notable contributions to experiments in CERN: The Omega spectrometer adopted a system John had originally developed for experiments at RAL using vidicon cameras to record the sparks in the spark chambers; He contributed to the success of NA1 and NA7, where he became heavily involved in the electronic trigger systems; He was responsible for the second level trigger system for the ALEPH detector and spent five years leading a team that designed and built the system, which ran for twelve years with only minor interventions. Following ALEPH he tur...

  10. Stirring Strongly Coupled Plasma

    CERN Document Server

    Fadafan, Kazem Bitaghsir; Rajagopal, Krishna; Wiedemann, Urs Achim

    2009-01-01

    We determine the energy it takes to move a test quark along a circle of radius L with angular frequency w through the strongly coupled plasma of N=4 supersymmetric Yang-Mills (SYM) theory. We find that for most values of L and w the energy deposited by stirring the plasma in this way is governed either by the drag force acting on a test quark moving through the plasma in a straight line with speed v=Lw or by the energy radiated by a quark in circular motion in the absence of any plasma, whichever is larger. There is a continuous crossover from the drag-dominated regime to the radiation-dominated regime. In the crossover regime we find evidence for significant destructive interference between energy loss due to drag and that due to radiation as if in vacuum. The rotating quark thus serves as a model system in which the relative strength of, and interplay between, two different mechanisms of parton energy loss is accessible via a controlled classical gravity calculation. We close by speculating on the implicati...

  11. Strong-interaction nonuniversality

    International Nuclear Information System (INIS)

    Volkas, R.R.; Foot, R.; He, X.; Joshi, G.C.

    1989-01-01

    The universal QCD color theory is extended to an SU(3) 1 direct product SU(3) 2 direct product SU(3) 3 gauge theory, where quarks of the ith generation transform as triplets under SU(3)/sub i/ and singlets under the other two factors. The usual color group is then identified with the diagonal subgroup, which remains exact after symmetry breaking. The gauge bosons associated with the 16 broken generators then form two massive octets under ordinary color. The interactions between quarks and these heavy gluonlike particles are explicitly nonuniversal and thus an exploration of their physical implications allows us to shed light on the fundamental issue of strong-interaction universality. Nonuniversality and weak flavor mixing are shown to generate heavy-gluon-induced flavor-changing neutral currents. The phenomenology of these processes is studied, as they provide the major experimental constraint on the extended theory. Three symmetry-breaking scenarios are presented. The first has color breaking occurring at the weak scale, while the second and third divorce the two scales. The third model has the interesting feature of radiatively induced off-diagonal Kobayashi-Maskawa matrix elements

  12. Exploring the Resurgence of Ethno-Cultural Identity in Nigeria

    African Journals Online (AJOL)

    2015-05-29

    May 29, 2015 ... speaking divergent languages but largely sharing the same culture and tradition. (Shibutani and Kwan 1965:47). ... by shared cultural and traditional ties. This implies that, ethnic group is an ...... sector of the economy not just in northern Nigeria but throughout the country. They constitute an estimated ...

  13. [Construction of recombinant lentiviral vector of Tie2-RNAi and its influence on malignant melanoma cells in vitro].

    Science.gov (United States)

    Shan, Xiu-ying; Liu, Zhao-liang; Wang, Biao; Guo, Guo-xiang; Wang, Mei-shui; Zhuang, Fu-lian; Cai, Chuan-shu; Zhang, Ming-feng; Zhang, Yan-ding

    2011-07-01

    To construct lentivector carrying Tie2-Small interfering RNA (SiRNA), so as to study its influence on malignant melanoma cells. Recombinant plasmid pSilencer 1.0-U6-Tie2-siRNA and plasmid pNL-EGFP were digested with XbaI, ligated a target lentiviral transfer plasmid of pNL-EGFP-U6-Tie2-I or pNL-EGFP-U6-Tie2-II, and then the electrophoresis clones was sequenced. Plasmids of pNL-EGFP-U6-Tie2-I and pNL-EGFP-U6-Tie2-II were constructed and combined with pVSVG and pHelper, respectively, to constitute lentiviral vector system of three plasmids. The Lentiviral vector system was transfected into 293T cell to produce pNL-EGFP-U6-Tie2- I and pNL-EGFP-U6-Tie2-II lentivirus. Then the supernatant was collected to determine the titer. Malignant melanoma cells were infected by both lentiviruses and identified by Realtime RT-PCR to assess inhibitory efficiency. The recombinant lentiviral vectors of Tie2-RNAi were constructed successfully which were analyzed with restriction enzyme digestion and identified by sequencing. And the titer of lentiviral vector was 8.8 x 10(3)/ml, which was determined by 293T cell. The results of Realtime RT-PCR demonstrated that the lentiviral vectors of Tie2-RNAi could infect malignant melanoma cells and inhibit the expression of Tie2 genes in malignant melanoma cells (P0.05) between the two lentiviral vectors of Tie2-RNAi. Lentivector carrying Tie2-SiRNA can be constructed successfully and inhibit the expression of Tie2 gene in vitro significantly. The study will supply the theory basis for the further research on the inhibition of tumor growth in vivo.

  14. Modeling “unilateral” response in the cross-ties of a cable network: Deterministic vibration

    Science.gov (United States)

    Giaccu, Gian Felice; Caracoglia, Luca; Barbiellini, Bernardo

    2014-09-01

    Cross-ties are employed as passive devices for the mitigation of stay-cable vibrations, exhibited on cable-stayed bridges under wind and wind-rain excitation. Large-amplitude oscillation can result in damage to the cables or perceived discomfort to bridge users. The “cable-cross-ties system” derived by connecting two or more stays by transverse cross-ties is often referred to as an “in-plane cable network”. Linear modeling of network dynamics has been available for some time. This framework, however, cannot be used to detect incipient failure in the restrainers due to slackening or snapping. A new model is proposed in this paper to analyze the effects of a complete loss in the pre-tensioning force imparted to the cross-ties, which leads to the “unilateral” free-vibration response of the network (i.e., a cross-tie with linear-elastic internal force in tension and partially inactive in compression). Deterministic free vibrations of a three-cable network are investigated by using the “equivalent linearization method”. A performance coefficient is introduced to monitor the relative reduction in the average (apparent) stiffness of the connector during free vibration response (“mode by mode”), exhibiting unilateral behavior. A reduction of fifty percent in the apparent stiffness was observed in the cross-tie when the pre-tensioning force is small in comparison with the tension force in the stay. This coefficient may be used as a damage indicator for the selection of the initial pre-tensioning force in the cross-ties needed to avoid slackening.

  15. Taiwan-China: The Gordian Knot Stays Tied

    Directory of Open Access Journals (Sweden)

    Saša Istenič

    2014-12-01

    Full Text Available Separated historical, geographical, economic, political, and social processes on the two sides of the Taiwan Strait have formed two entirely different political, economic and cultural entities. However, up to now, the governments in Beijing and Taipei have not yet found a common language regarding the questions related to Taiwan’s sovereignty. Whereas for the government in Beijing, Taiwan is an inalienable part of the People’s Republic of China, the government of the Republic of China who has actually been ruling Taiwan for almost 70 years, regards it as a sovereign, independent country. How to find a manageable political consensus that would please both parties remains a key question. The present article will outline the recent dynamics and illuminate the obstacles on the road toward long-term peace and stability in the Taiwan Strait.

  16. Occupational contact dermatitis among the traditional ′tie and dye′ cottage industry in Western Rajasthan

    Directory of Open Access Journals (Sweden)

    Singhi M

    2005-01-01

    Full Text Available Background : Dyeing is an age-old process and forms an integral part of textile industries. Tying is a process by which a particular part of cloth is prevented from the process of dyeing. The skin diseases in workers engaged in the ′tie and dye′ industry have not been extensively studied. Aims : To study the prevalence of contact dermatitis among workers engaged in the ′tie and dye′ industries in and around Jodhpur (Western Rajasthan. Methods : One thousand three hundred workers engaged in ′tie and dye′ work were evaluated for occupation-related dermatitis. Those with skin lesions were subjected to patch tests using 2% aqueous solution of the dyes and chemicals commonly used by them. These included direct dyes, VAT dyes, sulfur dyes and azo dyes. Fifty workers without skin lesions served as controls. Results : One hundred patients (7.69% had dermatitis involving the exposed sites, mainly the hands and forearms. Eighty-one patients showed positive reactions to one or more dyes, most commonly Red RC base (azo dye, followed by naphthol. Conclusion: Red RC base and naphthol were the commonest allergens in the ′tie and dye′ industry.

  17. Assigning Tie Points to a Generalised Building Model for Uas Image Orientation

    Science.gov (United States)

    Unger, J.; Rottensteiner, F.; Heipke, C.

    2017-08-01

    This paper addresses the integration of a building model into the pose estimation of image sequences. Images are captured by an Unmanned Aerial System (UAS) equipped with a camera flying in between buildings. Two approaches to assign tie points to a generalised building model in object space are presented. A direct approach is based on the distances between the object coordinates of tie points and planes of the building model. An indirect approach first finds planes within the tie point cloud that are subsequently matched to model planes; finally based on these matches, tie points are assigned to model planes. For both cases, the assignments are used in a hybrid bundle adjustment to refine the poses (image orientations). Experimental results for an image sequence demonstrate improvements in comparison to an adjustment without the building model. Differences and limitations of the two approaches for point-plane assignment are discussed - in the experiments they perform similar with respect to estimated standard deviations of tie points.

  18. The social ties that bind: social anxiety and academic achievement across the university years.

    Science.gov (United States)

    Brook, Christina A; Willoughby, Teena

    2015-05-01

    Given that engagement and integration in university/college are considered key to successful academic achievement, the identifying features of social anxiety, including fear of negative evaluation and distress and avoidance of new or all social situations, may be particularly disadvantageous in the social and evaluative contexts that are integral to university/college life. Thus, the purpose of this study was to examine the direct effects of social anxiety on academic achievement, as well as investigate an indirect mechanism through which social anxiety might impact on academic achievement, namely, the formation of new social ties in university. The participants were 942 (71.7 % female; M = 19 years at Time 1) students enrolled in a mid-sized university in Southern Ontario, Canada. Students completed annual assessments of social anxiety, social ties, and academic achievement for three consecutive years. The results from an autoregressive cross-lag path analysis indicated that social anxiety had a significant and negative direct relationship with academic achievement. Moreover, the negative indirect effect of social anxiety on academic achievement through social ties was significant, as was the opposing direction of effects (i.e., the indirect effect of academic achievement on social anxiety through social ties). These findings highlight the critical role that social ties appear to play in successful academic outcomes and in alleviating the effects of social anxiety during university/college.

  19. Breaking up Isn't Hard to Do: Exploring the Dissolution of Teachers' and School Leaders' Work-Related Ties

    Science.gov (United States)

    Spillane, James P.; Shirrell, Matthew

    2017-01-01

    Purpose: School leaders are central to the development of work-related ties among school staff. Although prior work has examined the predictors of the presence of work-related ties, little is known about the breakup or dissolution of ties among school staff. This study examines the extent of tie dissolution among school staff, as well as both the…

  20. HIL evaluation of control unit in grid-tied coverters

    Directory of Open Access Journals (Sweden)

    Porobić Vlado B.

    2016-01-01

    Full Text Available Hardware-in-the-Loop (HIL emulation is poised to become unsurpassed design tool for development, testing, and optimization of real-time control algorithms for grid connected power electronics converters for distributed generation, active filters and smart grid applications. It is strongly important to examine and test how grid connected converters perform under different operating conditions including grid disturbances and faults. In that sense, converter’s controller is a key component responsible for ensuring safe and high-performance operation. This paper demonstrates an example how ultra-low latency and high fidelity HIL emulator is used to easily, rapidly and exhaustively test and validate standard control strategy for grid connected power electronics converters, without need for expensive hardware prototyping and laboratory test equipment. [Projekat Ministarstva nauke Republike Srbije, br. III 042004 and by the Provincial Secretariat for Science and Technological Development of AP Vojvodina under contract No. 114-451-3508/2013-04

  1. "A commitment to cultural pluralism". Diversity Practices in two Amsterdam venues: Paradiso and the Meervaart

    NARCIS (Netherlands)

    Delhaye, C.; van de Ven, V.

    2014-01-01

    Cultural policy has traditionally had close ties with the construction of the society as a nation state, which has been marked by its built-in tendency towards cultural homogenisation. Post-World War II, multicultural societies pose profound challenges to these traditional forms of cultural policy.

  2. Mental health of sub-saharan african migrants: The gendered role of migration paths and transnational ties

    Directory of Open Access Journals (Sweden)

    Julie Pannetier

    2017-12-01

    Full Text Available In Europe, migrants are at higher risk of common mental disorders or psychological distress than are natives. Little is known regarding the social determinants of migrant mental health, particularly the roles played by migration conditions and transnational practices, which may manifest themselves in different ways for men and for women. The goal of this paper was to understand the gendered roles of migration paths and transnational ties in mental health among sub-Saharan African migrants residing in the Paris, France, metropolitan area. This study used data from the Parcours study conducted in 2012–2013, which employed a life-event approach to collect data from a representative sample of migrants who visited healthcare facilities (n = 2468. We measured anxiety and depressive symptoms at the time of data collection with the Patient Health Questionnaire-4 (PHQ-4. Reasons for migration, the living conditions in the host country and transnational ties after migration were taken into account by sex and after adjustment. Our study demonstrates that among sub-Saharan African migrants, mental health is related to the migratory path and the migrant’s situation in the host country but differently for women and men. Among women, anxiety and depressive symptoms were strongly related to having left one’s home country because of threats to one’s life. Among men, residing illegally in the host country was related to impaired mental health. For both women and men, cross-border separation from a child less than 18 years old was not independently associated with anxiety and depressive symptoms. In addition, social and emotional support from relatives and friends—both from the society of origin and of destination—were associated with lower anxiety and depressive symptoms. Migrant mental health may be impaired in the current context of anti-migrant policies and an anti-immigrant social environment in Europe.

  3. Mental health of sub-saharan african migrants: The gendered role of migration paths and transnational ties.

    Science.gov (United States)

    Pannetier, Julie; Lert, France; Jauffret Roustide, Marie; du Loû, Annabel Desgrées

    2017-12-01

    In Europe, migrants are at higher risk of common mental disorders or psychological distress than are natives. Little is known regarding the social determinants of migrant mental health, particularly the roles played by migration conditions and transnational practices, which may manifest themselves in different ways for men and for women. The goal of this paper was to understand the gendered roles of migration paths and transnational ties in mental health among sub-Saharan African migrants residing in the Paris, France, metropolitan area. This study used data from the Parcours study conducted in 2012-2013, which employed a life-event approach to collect data from a representative sample of migrants who visited healthcare facilities (n = 2468). We measured anxiety and depressive symptoms at the time of data collection with the Patient Health Questionnaire-4 (PHQ-4). Reasons for migration, the living conditions in the host country and transnational ties after migration were taken into account by sex and after adjustment. Our study demonstrates that among sub-Saharan African migrants, mental health is related to the migratory path and the migrant's situation in the host country but differently for women and men. Among women, anxiety and depressive symptoms were strongly related to having left one's home country because of threats to one's life. Among men, residing illegally in the host country was related to impaired mental health. For both women and men, cross-border separation from a child less than 18 years old was not independently associated with anxiety and depressive symptoms. In addition, social and emotional support from relatives and friends-both from the society of origin and of destination-were associated with lower anxiety and depressive symptoms. Migrant mental health may be impaired in the current context of anti-migrant policies and an anti-immigrant social environment in Europe.

  4. Design and construction of the tensioned ties for UX15 cavern vault

    CERN Document Server

    Parkin, R J H

    2002-01-01

    Due to the programme constraints for the UX15 cavern set by CERN, it has been necessary to complete the concrete lining of the vault prior to the excavation of the bench. The vault lining is therefore being temporarily suspended from a number of pre-tensioned high capacity multi-strand tensioned ties. During excavation of the bench, additional loads will be imposed onto the vault lining due to ground displacements. In order to minimise the number of ties, the previously completed linings of the PX14 and PX16 access shafts will be used to support some of the load. Three-dimensional modelling has been undertaken to design the structures and determine the expected behaviour of this complex support system. Geotechnical instrumentation has been installed in the concrete linings and the ground to monitor loads and displacements during construction. After the cavern walls have been completed, the ties will be released.

  5. Influence of knot configuration and tying technique on the mechanical performance of sutures.

    Science.gov (United States)

    Zimmer, C A; Thacker, J G; Powell, D M; Bellian, K T; Becker, D G; Rodeheaver, G T; Edlich, R F

    1991-01-01

    The purpose of this investigation was to determine the influence of knot configuration and tying technique on the mechanical performance of surgical sutures. Multifilament and monofilament nylon sutures were selected for this evaluation because they are commonly used in wound closure. The mechanical performance of these sutures was judged by the following parameters: knot breakage force, configuration of secure knots, and knot run down force. During each test, tension was applied at either rapid or slow rates, which correlates with the physician's speed of tying knots. On the basis of these mechanical performance tests, four throw square (1 = 1 = 1 =1) knots and five throw square (1 = 1 = 1 = 1 = 1) knots are recommended for monofilament nylon and multifilament nylon sutures, respectively, in which the speed of application of forces to the knots is relatively slow. Because these tests can easily be replicated in any laboratory, manufacturers now have a scientific basis for recommending specific tying techniques for their surgical sutures.

  6. Analysis and design of type b package tie-down systems

    International Nuclear Information System (INIS)

    Phalippou, C.; Tombini, C.; Tanguy, L.

    1993-01-01

    In order to analyse the incidence of tie-down conditions as a cause of road accidents and to advise carriers on methods of calculating the risk, the French Atomic Energy Commission (CEA), within the framework of a research contract financed by the European Community, conducted a survey into road accidents in which B type packages were involved. After analysis of the survey results, the CEA then conducted reduced scale tests on representative models to establish design rules for tie-down systems. These rules have been the subject of various publications and have at last resulted in the production of a software aid to the design and monitoring of tie-down systems. This document states the various stages involved in this work and the way in which the ARRIMAGE software is arranged. (J.P.N.)

  7. Tongue-tie and frenotomy in infants with breastfeeding difficulties: achieving a balance.

    Science.gov (United States)

    Power, R F; Murphy, J F

    2015-05-01

    Currently there is debate on how best to manage young infants with tongue-tie who have breastfeeding problems. One of the challenges is the subjectivity of the outcome variables used to assess efficacy of tongue-tie division. This structured review documents how the argument has evolved. It proposes how best to assess, inform and manage mothers and their babies who present with tongue-tie related breastfeeding problems. Databases were searched for relevant papers including Pubmed, Medline, and the Cochrane Library. Professionals in the field were personally contacted regarding the provision of additional data. Inclusion criteria were: infants less than 3 months old with tongue-tie and/or feeding problems. The exclusion criteria were infants with oral anomalies and neuromuscular disorders. There is wide variation in prevalence rates reported in different series, from 0.02 to 10.7%. The most comprehensive clinical assessment is the Hazelbaker Assessment Tool for lingual frenulum function. The most recently published systematic review of the effect of tongue-tie release on breastfeeding concludes that there were a limited number of studies with quality evidence. There have been 316 infants enrolled in frenotomy RCTs across five studies. No major complications from surgical division were reported. The complications of frenotomy may be minimised with a check list before embarking on the procedure. Good assessment and selection are important because 50% of breastfeeding babies with ankyloglossia will not encounter any problems. We recommend 2 to 3 weeks as reasonable timing for intervention. Frenotomy appears to improve breastfeeding in infants with tongue-tie, but the placebo effect is difficult to quantify. Complications are rare, but it is important that it is carried out by a trained professional. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  8. REGISTRATION OF LASER SCANNING POINT CLOUDS AND AERIAL IMAGES USING EITHER ARTIFICIAL OR NATURAL TIE FEATURES

    Directory of Open Access Journals (Sweden)

    P. Rönnholm

    2012-07-01

    Full Text Available Integration of laser scanning data and photographs is an excellent combination regarding both redundancy and complementary. Applications of integration vary from sensor and data calibration to advanced classification and scene understanding. In this research, only airborne laser scanning and aerial images are considered. Currently, the initial registration is solved using direct orientation sensors GPS and inertial measurements. However, the accuracy is not usually sufficient for reliable integration of data sets, and thus the initial registration needs to be improved. A registration of data from different sources requires searching and measuring of accurate tie features. Usually, points, lines or planes are preferred as tie features. Therefore, the majority of resent methods rely highly on artificial objects, such as buildings, targets or road paintings. However, in many areas no such objects are available. For example in forestry areas, it would be advantageous to be able to improve registration between laser data and images without making additional ground measurements. Therefore, there is a need to solve registration using only natural features, such as vegetation and ground surfaces. Using vegetation as tie features is challenging, because the shape and even location of vegetation can change because of wind, for example. The aim of this article was to compare registration accuracies derived by using either artificial or natural tie features. The test area included urban objects as well as trees and other vegetation. In this area, two registrations were performed, firstly, using mainly built objects and, secondly, using only vegetation and ground surface. The registrations were solved applying the interactive orientation method. As a result, using artificial tie features leaded to a successful registration in all directions of the coordinate system axes. In the case of using natural tie features, however, the detection of correct heights was

  9. FEATURES OF DESIGN OF TIED-ARCH BRIDGES WITH FLEXIBLE INCLINED SUSPENSION HANGERS

    Directory of Open Access Journals (Sweden)

    V. O. Samosvat

    2017-10-01

    Full Text Available Purpose. Investigation and analysis of the hanger arrangement and the structural stability of a Network arch bridge – a tied-arch bridge with inclined hangers that cross each other at least twice. It is also necessary to make a comparative analysis with other types of hanger arrangements. Methodology. The authors in their research investigated a large number of parameters to determine their influence in the force distribution in the arch. Eventually they determined optimal values for all parameters. These optimal values allowed developing a design guide that leads to optimal arch design. When solving this problem, the authors used three-dimensional finite element models and the objective was to determine the most suitable solution for a road bridge, with a span of 100 meters, consisting of two inclined steel arches, located on a road with two traffic lanes, subjected to medium traffic. The virtual prototype of the model is performed by finite element simulator Midas Civil. Findings. In this study, for the bridge deck, a concrete tie appears to be the best solution considering the structural behavior of network arches, but economic advantages caused by easier erection may lead to steel or a composite bridge deck as better alternatives. Design requirements and local conditions of each particular bridge project will decide the most economic deck design.Originality. To ensure passenger comfort and the stability and continuity of the track, deformations of bridges are constricted. A network arch is a stiff structure with small deflections and therefore suitable to comply with such demands even for high speed railway traffic.
A network arch bridge with a concrete tie usually saves more than half the steel required for tied arches with vertical hangers and concrete ties. Practical value. Following the study design advice given in this article leads to savings of about 60 % of structural steel compared with conventional tied arch bridges with

  10. United States, Europe and Poland Different Stages of Antitrust Tying War in the New Economy

    Directory of Open Access Journals (Sweden)

    Mariusz SWORA

    2006-06-01

    Full Text Available Microsoft’s case has led to heated debates, both in Europe and the United States of America, on the abuse of the dominant position and on the prohibition of tying. This discussion, both in Europe and the United States, is not finished. In this article the author presents legal implications of tying products in Europe and Poland and confronts them with the American approach to tying. In Poland, a country with a fast developing economy, with the growing level of foreign investments, discussion on monopolist practices under the conditions of a fast technological development1 has not really commenced yet. The problems of innovation and development of New Economy undertakings has gained new impetus following Poland’s accession to the European Union. It is a matter of time when the anti-trust law begins to show interest in them. There are some indications that this has already taken place. In the first part of this article the author briefly presents the discussion related to Microsoft III case in the United States insofar as it pertains to New Economy issues. The second and third parts address legal and political aspects of the Microsoft case in the European Union. In the fourth part legal aspects related to tying practices in Poland are presented. The article aims to show that instrumental and mechanical treatment of tying practices used by firms having the market power under conditions of technological progress is not proper. The problem of antitrust analysis of such practices is universal, as universal as these practices are. However, the problem is solved differently in the United States and in Europe and the reasons for such a different approach are rooted in the legal system and policy enforcement. Microsoft antitrust is global. After US and European cases, Korean competition authority has found Microsoft guilty of tying practices2. Regarding Microsoft problems with tying it is necessary to ask the question whether tying practices are

  11. An LLCL Power Filter for Single-Phase Grid-Tied Inverter

    DEFF Research Database (Denmark)

    Wu, Weimin; He, Yuanbin; Blaabjerg, Frede

    2012-01-01

    This paper presents a new topology of higher order power filter for grid-tied voltage-source inverters, named the LLCL filter, which inserts a small inductor in the branch loop of the capacitor in the traditional LCL filter to compose a series resonant circuit at the switching frequency...... to the inverter system control. The parameter design criteria of the proposed LLCL filter is also introduced. The comparative analysis and discussions regarding the traditional LCL filter and the proposed LLCL filter have been presented and evaluated through experiment on a 1.8-kW-single-phase grid-tied inverter...

  12. The centrality of social ties to climate migration and mental health

    Directory of Open Access Journals (Sweden)

    Jacqueline M. Torres

    2017-07-01

    Full Text Available Abstract Climate change-related hazards and disasters, known to adversely impact physical and mental health outcomes, are also expected to result in human migration above current levels. Environmentally-motivated migration and displacement may lead to the disruption of existing social ties, with potentially adverse consequences for mobile populations as well as their family members who remain in places of origin. We propose that the disruption of social ties is a key mechanism by which climate-related migration may negatively impact mental health, in particular. Existing social ties may provide social and material resources that buffer mental health stressors related to both prolonged and acute climate events. Preparation for such events may also strengthen these same ties and protect mental health. Communities may leverage social ties, first to mitigate climate change, and second, to adapt and rebuild post-disaster in communities of origin. Additionally, social ties can inform migration decisions and destinations. For example, scholars have found that the drought-motivated adaptive migration of West African Fulbe herders only occurred because of the long-term development of social networks between migrants and non-migrants through trade and seasonal grazing. On the other hand, social ties do not always benefit mental health. Some migrants, including those from poor regions or communities with no formal safety net, may face considerable burden to provide financial and emotional resources to family members who remain in countries of origin. In destination communities, migrants often face significant social marginalization. Therefore, policies and programs that aim to maintain ongoing social ties among migrants and their family and community members may be critically important in efforts to enhance population resilience and adaptation to climate change and to improve mental health outcomes. Several online platforms, like Refugee Start Force

  13. The centrality of social ties to climate migration and mental health.

    Science.gov (United States)

    Torres, Jacqueline M; Casey, Joan A

    2017-07-06

    Climate change-related hazards and disasters, known to adversely impact physical and mental health outcomes, are also expected to result in human migration above current levels. Environmentally-motivated migration and displacement may lead to the disruption of existing social ties, with potentially adverse consequences for mobile populations as well as their family members who remain in places of origin. We propose that the disruption of social ties is a key mechanism by which climate-related migration may negatively impact mental health, in particular. Existing social ties may provide social and material resources that buffer mental health stressors related to both prolonged and acute climate events. Preparation for such events may also strengthen these same ties and protect mental health. Communities may leverage social ties, first to mitigate climate change, and second, to adapt and rebuild post-disaster in communities of origin. Additionally, social ties can inform migration decisions and destinations. For example, scholars have found that the drought-motivated adaptive migration of West African Fulbe herders only occurred because of the long-term development of social networks between migrants and non-migrants through trade and seasonal grazing. On the other hand, social ties do not always benefit mental health. Some migrants, including those from poor regions or communities with no formal safety net, may face considerable burden to provide financial and emotional resources to family members who remain in countries of origin. In destination communities, migrants often face significant social marginalization. Therefore, policies and programs that aim to maintain ongoing social ties among migrants and their family and community members may be critically important in efforts to enhance population resilience and adaptation to climate change and to improve mental health outcomes. Several online platforms, like Refugee Start Force, serve to integrate refugees by

  14. Family ties after divorce: long-term implications for children.

    Science.gov (United States)

    Ahrons, Constance R

    2007-03-01

    Drawing on the data from the longitudinal Binuclear Family Study, 173 grown children were interviewed 20 years after their parents' divorce. This article addresses two basic questions: (1) What impact does the relationship between parents have on their children 20 years after the divorce? and (2) When a parent remarries or cohabits, how does it impact a child's sense of family? The findings show that the parental subsystem continues to impact the binuclear family 20 years after marital disruption by exerting a strong influence on the quality of relationships within the family system. Children who reported that their parents were cooperative also reported better relationships with their parents, grandparents, stepparents, and siblings. Over the course of 20 years, most of the children experienced the remarriage of one or both parents, and one third of this sample remembered the remarriage as more stressful than the divorce. Of those who experienced the remarriage of both of their parents, two thirds reported that their father's remarriage was more stressful than their mother's. When children's relationships with their fathers deteriorated after divorce, their relationships with their paternal grandparents, stepmother, and stepsiblings were distant, negative, or nonexistent. Whether family relationships remain stable, improve, or get worse is dependent on a complex interweaving of many factors. Considering the long-term implications of divorce, the need to emphasize life course and family system perspectives is underscored.

  15. Entrepreneurial networks as culturally embedded phenomena

    Directory of Open Access Journals (Sweden)

    Vlatka Skokic

    2015-06-01

    Full Text Available Entrepreneurship research concerning networks has largely focused on network structure, content and governance. We believe that further research is required in order to gain a richer understanding of why specific network forms and types originated. The purpose of this paper is to explore the existence, importance, values and meanings of both the informal and formal networks and networking behaviours of small-scale hotel owner-managers embedded in the socio-economic context of Croatia. In order to gain richer and more detailed understanding of entrepreneurial networks and to understand the influence of socio-economic setting on entrepreneurial networking, we have employed qualitative, in-depth study with small hotel owners. Results suggest that entrepreneurs do not establish strong personal and firm-to-firm ties, but rather focus on formal associations. Reported findings identify socio-cultural factors apparently unique to the context of former socialist economy which have the potential to explain the reported networking behaviour. The adopted research approach brings another dimension to existing theoretical underpinnings, which can encourage researchers to extend or revise theories with new contextual variables.

  16. A 10-Year Follow-Up Study of Social Ties and Functional Health among the Old: The AGES Project.

    Science.gov (United States)

    Murata, Chiyoe; Saito, Tami; Tsuji, Taishi; Saito, Masashige; Kondo, Katsunori

    2017-07-03

    In Asian nations, family ties are considered important. However, it is not clear what happens among older people with no such ties. To investigate the association, we used longitudinal data from the Aichi Gerontological Evaluation Study (AGES) project. Functionally independent older people at baseline ( N = 14,088) in 10 municipalities were followed from 2003 to 2013. Social ties were assessed by asking about their social support exchange with family, relatives, friends, or neighbors. Cox proportional hazard models were employed to investigate the association between social ties and the onset of functional disability adjusting for age, health status, and living arrangement. We found that social ties with co-residing family members, and those with friends or neighbors, independently protected functional health with hazard ratios of 0.81 and 0.85 among men. Among women, ties with friend or neighbors had a stronger effect on health compared to their male counterparts with a hazard ratio of 0.89. The fact that social ties with friends or neighbors are associated with a lower risk of functional decline, independent of family support, serves to underscore the importance of promoting social ties, especially among those lacking family ties.

  17. Socio-Cultural Norms for Corporate Social Responsibility

    DEFF Research Database (Denmark)

    Kampf, Constance Elizabeth

    Abstract – This paper considers the cultural resources for corporate action tied into stakeholder models, criticizes current stakeholder models, and develops a perspective based in ethics and the political model of the stakeholder. The purpose of this analysis is to lay out models which recognize...... the cultural challenges related to the blurring of the boundaries of the corporation and the needs of different cultural contexts....

  18. International Students from Melbourne Describing Their Cross-Cultural Transitions Experiences: Culture Shock, Social Interaction, and Friendship Development

    OpenAIRE

    Belford, Nish

    2017-01-01

    Drawing from a study that explored how international students experience cross-cultural transitions after living and studying in Melbourne for a few years, this paper, in particular, examines the participants' experiences with culture shock, social interaction, and friendship development. The findings include narratives of their personal stories and perspectives on social engagement and friendship ties with a particular focus on variables including cultural similarity, inter...

  19. Patient ties to ambulatory care providers: the concept of provider loyalty.

    Science.gov (United States)

    Kingstrom, P O

    1983-01-01

    This paper introduces a cognitive measure of provider loyalty. Correlates of provider loyalty are investigated, and results are presented comparing provider loyalty with traditionally used measures of patient ties for predicting interest in and choice of a new health care provider. Implications for planning and marketing new forms of ambulatory care delivery systems are discussed and directions for future research are suggested.

  20. The VEGF system and tie-2 are spatio-temporal expressed during tayassu placentation

    DEFF Research Database (Denmark)

    Miglino, M.A.; Santos, T.C.; Papa, P.C.

    for immunhistochemistry using polyclonal antibodies against VEGF, VEGFR-1, VEGFR-2 and Tie-2. Results: In the present study the VEGF-system exhibited intense staining in the uterine epithelium, uterine glandular epithelium and trophoblast. The endothelial cells and smooth muscle cells of the vessels in the maternal...

  1. Impact of Group Emotions on Student Collective Action Tendencies, Ties, and Task Performance

    Science.gov (United States)

    Sundararajan, Malavika; Sundararajan, Binod; Manderson, Jill

    2016-01-01

    The authors tested the dynamics of collective action tendencies of student teams when trying to accomplish a shared goal, with a focus on the impact of member ties and team member interaction and emotional responses on team performance. The results show the direct and indirect impacts of both positive and negative group emotions on the student…

  2. Automated designation of tie-points for image-to-image coregistration.

    Science.gov (United States)

    R.E. Kennedy; W.B. Cohen

    2003-01-01

    Image-to-image registration requires identification of common points in both images (image tie-points: ITPs). Here we describe software implementing an automated, area-based technique for identifying ITPs. The ITP software was designed to follow two strategies: ( I ) capitalize on human knowledge and pattern recognition strengths, and (2) favour robustness in many...

  3. Founding a business inspired by close entrepreneurial ties: Does it matter for survival?

    NARCIS (Netherlands)

    de Jong, J.P.J.; Marsili, O.

    2015-01-01

    Founding a business may be inspired by close entrepreneurial ties, that is, business-owning relatives or friends. We analyze if and when such inspiration is associated with post-entry survival. Drawing on longitudinal data on 942 founders, we find a positive relationship only if founders start by

  4. Predicting a dissociative disorder from type of childhood maltreatment and abuser-abused relational tie.

    Science.gov (United States)

    Krüger, Christa; Fletcher, Lizelle

    2017-01-01

    We investigate the types of childhood maltreatment and abuser-abused relational ties that best predict a dissociative disorder (DD). Psychiatric inpatients (n = 116; mean age = 35; F:M = 1.28:1) completed measures of dissociation and trauma. Abuse type and abuser-abused relational ties were recorded in the Traumatic Experiences Questionnaire. Multidisciplinary team clinical diagnosis or administration of the SCID-D-R to high dissociators confirmed DD diagnoses. Logit models described the relationships between abuser-abused relational tie and the diagnostic grouping of patients, DD present (n = 16) or DD absent (n = 100). Fisher's exact tests measured the relative contribution of specific abuse types. There was a positive relationship between abuse frequency and the presence of DD. DD patients experienced more abuse than patients without DDs. Two combinations of abuse type and relational tie predicted a DD: childhood emotional neglect by biological parents/siblings and later emotional abuse by intimate partners. These findings support the early childhood etiology of DDs and subsequent maladaptive cycles of adult abuse. Enquiries about childhood maltreatment should include a history of emotional neglect by biological parents/siblings. Adult emotional abuse by intimate partners should assist in screening for DDs.

  5. Fuzzy Bayesian Network-Bow-Tie Analysis of Gas Leakage during Biomass Gasification.

    Directory of Open Access Journals (Sweden)

    Fang Yan

    Full Text Available Biomass gasification technology has been rapidly developed recently. But fire and poisoning accidents caused by gas leakage restrict the development and promotion of biomass gasification. Therefore, probabilistic safety assessment (PSA is necessary for biomass gasification system. Subsequently, Bayesian network-bow-tie (BN-bow-tie analysis was proposed by mapping bow-tie analysis into Bayesian network (BN. Causes of gas leakage and the accidents triggered by gas leakage can be obtained by bow-tie analysis, and BN was used to confirm the critical nodes of accidents by introducing corresponding three importance measures. Meanwhile, certain occurrence probability of failure was needed in PSA. In view of the insufficient failure data of biomass gasification, the occurrence probability of failure which cannot be obtained from standard reliability data sources was confirmed by fuzzy methods based on expert judgment. An improved approach considered expert weighting to aggregate fuzzy numbers included triangular and trapezoidal numbers was proposed, and the occurrence probability of failure was obtained. Finally, safety measures were indicated based on the obtained critical nodes. The theoretical occurrence probabilities in one year of gas leakage and the accidents caused by it were reduced to 1/10.3 of the original values by these safety measures.

  6. Fuzzy Bayesian Network-Bow-Tie Analysis of Gas Leakage during Biomass Gasification.

    Science.gov (United States)

    Yan, Fang; Xu, Kaili; Yao, Xiwen; Li, Yang

    2016-01-01

    Biomass gasification technology has been rapidly developed recently. But fire and poisoning accidents caused by gas leakage restrict the development and promotion of biomass gasification. Therefore, probabilistic safety assessment (PSA) is necessary for biomass gasification system. Subsequently, Bayesian network-bow-tie (BN-bow-tie) analysis was proposed by mapping bow-tie analysis into Bayesian network (BN). Causes of gas leakage and the accidents triggered by gas leakage can be obtained by bow-tie analysis, and BN was used to confirm the critical nodes of accidents by introducing corresponding three importance measures. Meanwhile, certain occurrence probability of failure was needed in PSA. In view of the insufficient failure data of biomass gasification, the occurrence probability of failure which cannot be obtained from standard reliability data sources was confirmed by fuzzy methods based on expert judgment. An improved approach considered expert weighting to aggregate fuzzy numbers included triangular and trapezoidal numbers was proposed, and the occurrence probability of failure was obtained. Finally, safety measures were indicated based on the obtained critical nodes. The theoretical occurrence probabilities in one year of gas leakage and the accidents caused by it were reduced to 1/10.3 of the original values by these safety measures.

  7. Application of the Bow Tie method for evaluation of safety in the procedure of logging wells

    International Nuclear Information System (INIS)

    Alfonso Pallares, C; Perez Reyes, Y.; Sarabia Molina, I.I.

    2013-01-01

    This work consists of an assessment of security in the practice of logging of oil wells, using the method of Bow Tie for being a simple method of evaluation of the risk, which makes it possible in a structured way to set priorities to manage risk

  8. The effects of integration and transnational ties on international return migration intentions

    NARCIS (Netherlands)

    de Haas, H.; Fokkema, C.M.

    2011-01-01

    While return migration is receiving increasing attention, there is still insufficient insight into the factors which determine migrants’ intentions and decisions to return. It is often assumed that integration in receiving countries and the concomitant weakening of transnational ties decreases the

  9. Social Support and Social Network Ties among the Homeless in a Downtown Atlanta Park

    Science.gov (United States)

    Reitzes, Donald C.; Crimmins, Timothy J.; Yarbrough, Johanna; Parker, Josie

    2011-01-01

    This study applies a typology of social support with 3 categories of social networks to investigate social ties and their benefits for homeless people. Data were derived from a 2-year long series of participant observations of homeless or precariously housed people who came regularly to a downtown Atlanta public park. The findings are as follows:…

  10. Does it pay to have friends? Social ties and executive appointments in banking

    NARCIS (Netherlands)

    Berger, A.N.; Kick, T.; Koetter, M.; Schaeck, K.

    2013-01-01

    We exploit a unique sample to analyze how homophily (affinity for similar others) and social ties affect career outcomes in banking. We test if these factors increase the probability that the appointee to an executive board is an outsider without previous employment at the bank compared to being an

  11. Practices and risks associated with operation of tie-down lashings in the vehicle transport industry.

    Science.gov (United States)

    Fraysse, François; Milanese, Steven; Thewlis, Dominic

    2016-12-01

    Load restraint systems in automobile transport utilise tie-down lashings placed over the car's tyres, which are tensioned manually by the operator using a ratchet assembly. This process has been identified as a significant manual handling injury risk. The aim of this study was to gain insight on the current practices associated with tie-down lashings operation, and identify the gaps between current and optimal practice. We approached this with qualitative and quantitative assessments and one numerical simulation to establish: (i) insight into the factors involved in ratcheting; (ii) the required tension to hold the car on the trailer; and (iii) the tension achieved by drivers in practice and associated joint loads. We identified that the method recommended to the drivers was not used in practice. Drivers instead tensioned the straps to the maximum of their capability, leading to over-tensioning and mechanical overload at the shoulder and elbow. We identified the postures and strategies that resulted in the lowest loads on the upper body during ratcheting (using both hands and performing the task with their full body). This research marks the first step towards the development of a training programme aiming at changing practice to reduce injury risks associated with the operation of tie-down lashings in the automobile transport industry. Practitioner Summary: The study investigated current practice associated with the operation of tie-down lashings through qualitative (interviews) and quantitative (biomechanical analysis) methods. Operators tended to systematically over-tension the lashings and consequently overexert, increasing injury risks.

  12. An Agent Model for a Human’s Social Support Network Tie Preference During Depression

    NARCIS (Netherlands)

    Aziz, A.A.; Klein, M.C.A.; Treur, J.; Baeza-Yates, R.; Lang, J.; Mitra, S.; Parsons, S.; Pasi, G.

    2009-01-01

    Seeking support from their environment is important for people suffering from a depression. People usually have different social networks to which they are attached with different ties. In this paper, a computational model is presented that describes the selection of network members for seeking

  13. Method and matter in the social sciences: Umbilically tied to the Enlightenment.

    Science.gov (United States)

    Beit-Hallahmi, Benjamin

    2015-01-01

    This commentary deals with the nonconformity of academics and the ethos of social science. Academics in all fields deviate from majority norms in politics and religion, and this deviance may be essential to the academic mind and to academic norms. The Enlightenment legacy inspires both methods and subject matter in academic work, and severing ties with it may be impossible.

  14. "People Are Either Too Fake or Too Real": Opportunities and Challenges in Tie-Based Anonymity

    DEFF Research Database (Denmark)

    Ma, Xiao; Andabili, Nazanin; Barkhuus, Louise

    2017-01-01

    In recent years, several mobile applications allowed individuals to anonymously share information with friends and contacts, without any persistent identity marker. The functions of these “tie-based” anonymity services may be notably different than other social media services. We use semi-structu...

  15. Any Ties that Bind? Economic Diplomacy on the South Asian Subcontinent

    NARCIS (Netherlands)

    S.M. Murshed (Syed); H. Dorussen; H. Ward (Huge)

    2011-01-01

    textabstractThe liberal peace emphasizes the importance of commercial ties and shared norms—of which shared democratic institutions have received most attention—for peaceful interstate relations. Ever since the creation of India and Pakistan in 1947, political relations between the two states have

  16. Stress grades and design properties for lumber, round timber, and ties

    Science.gov (United States)

    David E. Kretschmann

    2010-01-01

    Round timbers, ties, and lumber sawn from a log, regardless of species and size, are quite variable in mechanical properties. Pieces may differ in strength by several hundred percent. For simplicity and economy in use, pieces of wood of similar mechanical properties are placed in categories called stress grades, which are characterized by (a) one or more sorting...

  17. Preservation and Dissolution of the Target Firm's Embedded Ties in Acquisitions

    NARCIS (Netherlands)

    S. Spedale-Latimer (Simona); F.A.J. van den Bosch (Frans); H.W. Volberda (Henk)

    2006-01-01

    textabstractOur study builds on extant theory on embeddness to concentrate on the process of preservation and dissolution of the target firm’s embedded ties in acquisitions. We identify four critical areas - communication, idiosyncratic investments, inter-personal relations and, personnel turnover –

  18. Social ties within school classes : The roles of gender, ethnicity, and having older siblings

    NARCIS (Netherlands)

    Soetevent, AR; Kooreman, P

    2005-01-01

    In this paper we identify the lines along which social ties between high-school teenagers are primarily formed. To this end, we introduce interaction weights between pupils in the same school class that are a function of exogenous individual background characteristics, such as gender, ethnicity, and

  19. Preferential Price and Trade Tied Aid in Fiji: Implications on Price ...

    African Journals Online (AJOL)

    trade-tied-aid is to encourage production thus ensuring that aid money is not wasted on consumption activities ... However, despite receiving such high amount of aid money, the economic performance of most of the ..... pm is the output price, w is vector of input price and z is a vector of exogenous factors. BOJE: Botswana ...

  20. Quantum electrodynamics of strong fields

    International Nuclear Information System (INIS)

    Greiner, W.

    1983-01-01

    Quantum Electrodynamics of Strong Fields provides a broad survey of the theoretical and experimental work accomplished, presenting papers by a group of international researchers who have made significant contributions to this developing area. Exploring the quantum theory of strong fields, the volume focuses on the phase transition to a charged vacuum in strong electric fields. The contributors also discuss such related topics as QED at short distances, precision tests of QED, nonperturbative QCD and confinement, pion condensation, and strong gravitational fields In addition, the volume features a historical paper on the roots of quantum field theory in the history of quantum physics by noted researcher Friedrich Hund

  1. A Dramatic Increase in Tongue Tie-Related Articles: A 67 Years Systematic Review.

    Science.gov (United States)

    Bin-Nun, Alona; Kasirer, Yair M; Mimouni, Francis B

    2017-09-01

    Tongue tie or ankyloglossia articles are recorded in the Medline since 1949. To study trends in yearly number of tongue tie or ankyloglossia publications. Medline search engine was used to determine the yearly number of published consensus statements from 1949 to 2016. Keywords of tongue tie OR ankyloglossia OR frenotomy OR frenulotomy were used for the search. Articles were classified as case reports (or series), reviews, editorials (or opinions), cohort studies, clinical trials (nonrandomized), randomized controlled trials (RCT), and systematic reviews (SR). Linear or polynomial regression was used to determine trends. We also systematically summarized all RCTs published to date. The total number of yearly published articles increased in a cubic fashion (r 2  = 82.6%, p < 0.0001) over time (0-7 per year from 1949 to 1989, and up to 27-44 in the last 5 years). In terms of strength of evidence hierarchy, most articles belonged to low hierarchy categories (case reports 37.9%, reviews 15.4%, and editorials/opinions 13.4%), with only 8 RCTs and 10 SRs (all of them published during the last 10 years of the study period). The yearly number of tongue tie or ankyloglossia-related articles has increased dramatically in past few years. Most articles bring little evidence, but the past few years have witnessed publication of few RCTs and SRs. If this trend continues, much more solid evidence should accumulate about diagnosis and management of tongue tie, as it relates to breastfeeding and other outcomes.

  2. An analysis of the importance of appropriate tie breaking rules in dispatch heuristics

    Directory of Open Access Journals (Sweden)

    Jorge M. S. Valente

    2006-04-01

    Full Text Available In this paper, we analyse the effect of using appropriate tie breaking criteria in dispatch rules. We consider four different dispatch procedures, and for each of these heuristics we compare two versions that differ only in the way ties are broken. The first version breaks ties randomly, while the second uses a criterion that incorporates problem-specific knowledge. The computational results show that using adequate tie breaking criteria improves the performance of the dispatch heuristics. The magnitude of the improvement is different for the four heuristics, and also depends on the characteristics of each specific instance. The use of problem-related knowledge for breaking ties should therefore be given some consideration in the implementation of dispatch rules.Neste artigo é analisado o efeito da utilização de regras de desempate apropriadas na eficácia de regras de despacho. São consideradas quatro regras de despacho diferentes, e para cada uma destas heurísticas são comparadas duas versões que diferem no modo como os empates são resolvidos. A primeira versão resolve os empates de forma aleatória, enquanto a segunda utiliza um critério que incorpora informação relativa ao problema em causa. Os resultados computacionais mostram que a utilização de critérios de desempate adequados melhora o desempenho das regras de despacho. A magnitude da melhoria é diferente para as quatro heurísticas, e depende igualmente das características específicas de cada instância. A utilização de informação relativa ao problema em causa para a resolução de empates deve assim ser considerada na implementação de regras de despacho.

  3. Recognizing Moral Identity as a Cultural Construct.

    Science.gov (United States)

    Jia, Fanli; Krettenauer, Tobias

    2017-01-01

    Current research on moral identity shows that moral identity predicts moral action in Western cultures but not in non-Western cultures. The present paper argues that this may be due to the fact that the concept of moral identity is culturally biased. In order to remedy this situation, we argue that researchers should broaden their scopes of inquiry by adding a cultural lens to their studies of moral identity. This change is important because although some concept of moral identity likely exists in all cultures, it may function in different ways and at different levels in each place. We propose that moral identity is a context-dependent construct tied to varying social and cultural obligations. We argue that Western moral identity stresses an individually oriented morality, whereas, people from Eastern cultures consider a highly moral person to be societally oriented. We conclude by discussing the implications of this view for future research.

  4. The bright-side and dark-side effects of embedded ties in business-to-business innovation

    NARCIS (Netherlands)

    Noordhoff, C.S.; Kyriakopoulos, K.; Moorman, C.; Pauwels, P.; Dellaert, B.

    2011-01-01

    Although the number and importance of joint innovation projects between suppliers and their customers continue to rise, the literature has yet to resolve a key question: Do embedded ties with customers help or hurt supplier innovation? Drawing on both the tie strength and knowledge literatures, the

  5. 49 CFR 1242.15 - Roadway, tunnels and subways, bridges and culverts, ties, rails, other track material, ballast...

    Science.gov (United States)

    2010-10-01

    ... locomotive unit-hours in the common yards. (2) Way: Where the tracks at any one location are used in common..., ties, rails, other track material, ballast, track laying and surfacing, and road property damaged... culverts, ties, rails, other track material, ballast, track laying and surfacing, and road property damaged...

  6. Strong WW Interaction at LHC

    Energy Technology Data Exchange (ETDEWEB)

    Pelaez, Jose R

    1998-12-14

    We present a brief pedagogical introduction to the Effective Electroweak Chiral Lagrangians, which provide a model independent description of the WW interactions in the strong regime. When it is complemented with some unitarization or a dispersive approach, this formalism allows the study of the general strong scenario expected at the LHC, including resonances.

  7. Safety culture : a significant influence on safety in transportation

    Science.gov (United States)

    2017-08-01

    An organizations safety culture can influence safety outcomes. Research and experience show that when safety culture is strong, accidents are less frequent and less severe. As a result, building and maintaining strong safety cultures should be a t...

  8. Strong-back safety latch

    International Nuclear Information System (INIS)

    DeSantis, G.N.

    1995-01-01

    The calculation decides the integrity of the safety latch that will hold the strong-back to the pump during lifting. The safety latch will be welded to the strong-back and will latch to a 1.5-in. dia cantilever rod welded to the pump baseplate. The static and dynamic analysis shows that the safety latch will hold the strong-back to the pump if the friction clamps fail and the pump become free from the strong-back. Thus, the safety latch will meet the requirements of the Lifting and Rigging Manual for under the hook lifting for static loading; it can withstand shock loads from the strong-back falling 0.25 inch

  9. Strong-back safety latch

    Energy Technology Data Exchange (ETDEWEB)

    DeSantis, G.N.

    1995-03-06

    The calculation decides the integrity of the safety latch that will hold the strong-back to the pump during lifting. The safety latch will be welded to the strong-back and will latch to a 1.5-in. dia cantilever rod welded to the pump baseplate. The static and dynamic analysis shows that the safety latch will hold the strong-back to the pump if the friction clamps fail and the pump become free from the strong-back. Thus, the safety latch will meet the requirements of the Lifting and Rigging Manual for under the hook lifting for static loading; it can withstand shock loads from the strong-back falling 0.25 inch.

  10. Linking transformational leadership and organizational culture

    NARCIS (Netherlands)

    den Hartog, D.N.; van Meijen, J.J.; Koopman, P.L.

    1996-01-01

    Many authors assume a strong relationship between culture and leadership in organizations. Leaders create, transform and manage organizational cultures. Although this linkage between organizational culture and leadership is often referred to, hypotheses and propositions are often not specific and

  11. Jesus and cultural values: Family life as an example

    Directory of Open Access Journals (Sweden)

    Carolyn Osiek

    1997-12-01

    Full Text Available 'Family values' is a set of traditional images that most cultures collect, images drawn mostly from an idealized picture of family life in the recent past. For Christians, the popular image of Jesus gets included: the Holy Family as a nuclear family unit, Jesus blessing children, Jesus as advocate of traditional family life. A closer reading of both contemporary family life and the Gospels reveals that things are not what they seem. Contemporary family life in Western societies is structured quite differently than the ideal. Jesus' family life was spent in a peasant village surrounded by relatives and neighbors, with little privacy and strong social pressure towards conformity. The gospel records indicate that he did not conform, and paid the price: rejection and misunderstanding by his extended family. The Synoptic Gospels consistently ponray not only an estrangement between Jesus and his family, but Jesus' encouragement of his disciples to break family ties in favor of the surrogate family of the circle of disciples. In a culture in which kinship loyalty was essential, this  message caused deep problems for early Christians which the authors of the household codes of Ephesians, Colossians, the  Pastoral Epistles, and 1 Peter tried to alleviate.

  12. Titanium: light, strong, and white

    Science.gov (United States)

    Woodruff, Laurel; Bedinger, George

    2013-01-01

    Titanium (Ti) is a strong silver-gray metal that is highly resistant to corrosion and is chemically inert. It is as strong as steel but 45 percent lighter, and it is twice as strong as aluminum but only 60 percent heavier. Titanium dioxide (TiO2) has a very high refractive index, which means that it has high light-scattering ability. As a result, TiO2 imparts whiteness, opacity, and brightness to many products. ...Because of the unique physical properties of titanium metal and the whiteness provided by TiO2, titanium is now used widely in modern industrial societies.

  13. Organizational culture modeling

    OpenAIRE

    Valentina Mihaela GHINEA; Constantin BRĂTIANU

    2012-01-01

    The purpose of this paper is to present a conceptual analysis of organizational culture modeling in the framework of system dynamics. Tom Peters and Robert Waterman demonstrated through their seminal research that organizational culture constitutes one of the most important key success factors in any company trying to achieve excellence in its business. Organizational culture is a strong nonlinear integrator of the organizational intellectual capital acting especially on the emotional knowled...

  14. Cultural categories of energy use

    International Nuclear Information System (INIS)

    Barnett, S.

    1983-06-01

    Energy use patterns and attitudes are tied to more general cultural patterns, not simply to an economic or engineering rationality. To illustrate this, sharply contrasting use patterns and attitudes toward nuclear energy, coal and alternative forms of energy will be compared for India and the United States. This comparison, focussing on different perceptions of risks associated with developing energy technologies, future energy requirements, environmental concerns, and conservation patterns, will be used to develop a more extensive discussion of the above energy sources in western Europe and South America. The talk will conclude with some conjectures about the implications of cultural differences and political environments for world energy development patterns in the proximate future. Likely cultural and political influences on the direction of energy use (efficiency, rates of adoption of new technology), and energy needs for industrialization and reindustrialization will be described for North America, western Europe, and selected LDC's

  15. Broadcasting in Iceland: Cultural Protectionism and U.S. Influence.

    Science.gov (United States)

    Hudson, Tim

    Icelanders are a highly literate people, their culture tied together by perhaps the most complete written tradition of any modern nation. No wonder, then, that the tiny island country seemed in no rush to develop a television broadcasting system. Indeed, it is questionable whether television would have been in demand at all if not for outside…

  16. Tying Knots

    DEFF Research Database (Denmark)

    Bødker, Susanne; Dindler, Christian; Iversen, Ole Sejer

    2017-01-01

    dispersed within these networks. To illustrate and discuss the process of participatory infrastructuring we use a case study from an educational context. This particular project contains a diverse set of design activities at many organizational levels revolving around technology, decision-making, competence...... of the literature on infrastructuring, participatory design, and activity theory, and leads to a revised understanding of, for example, learning and conflicts in participatory infrastructuring....

  17. Social and cultural resources for the setting up and functioning of family enterprises in a small Bulgarian town

    Directory of Open Access Journals (Sweden)

    Petrova Ivanka

    2015-01-01

    Full Text Available As a field of culture, the family enterprise shows that in the current European societies the economic operation does not proceed only from a purely rational point of view and that notwithstanding the common speaking of globalization, the local may be a prerequisite for successful economic development. My objective has been to show, proceeding from an example from a small Bulgarian town, that the family enterprise is a field of culture in which the observed phenomena are strongly influenced by the social inclusion of the enterprise and by its tie-up with the context of the urban environment. I shall investigate in what way local social and cultural resources are intensively used in the process of setting up and functioning of a family enterprise from the sphere of hoteldom and tourism in the town of Belogradchik. I intend to study whether these resources are conducive to the economic prosperity of the firm. Another research objective is to establish the manner of identification of the enterprise with the town, with the region and the local culture by way of the services provided (tourist and restaurant. I shall look for an answer to the question of how the enterprise’ working realm fits in the concrete cultural, historical and social context of the town.

  18. The weak-ties in advanced business services as a major force of innovation and diffusion; Las Eak-Ties en los servicios avanzados a empresas como factor relevante de la innovacion y su difusion

    Energy Technology Data Exchange (ETDEWEB)

    Almenar i Llongo, V.; Hernandez Sancho, F.; Solar i Marco, V.

    2012-07-01

    This paper tries to expose the role of weak-ties of advanced business services in both mechanisms which generate innovation as well as allow technological diffusion and transfer of innovations (spillovers). Assuming that the latest information generally flows to agents through weak ties, the Weak-Ties Hypothesis (WTH) is an approach that helps to explain the importance of the relations with the environment in the process of innovation and generation of new knowledge and its implementation and dissemination, evaluating the synergy's resulting from cooperation between agents. (Author) 21 refs.

  19. Strengthening Social Ties to Increase Confidence and Self-Esteem Among Sexual and Gender Minority Youth.

    Science.gov (United States)

    Romijnders, Kim A; Wilkerson, J Michael; Crutzen, Rik; Kok, Gerjo; Bauldry, Jessica; Lawler, Sylvia M

    2017-05-01

    Sexual and gender minority (SGM) youth too often live in nonsupportive environments. This study reports the influence of social support from primary and secondary social ties on confidence and self-esteem among participants in Hatch Youth, a drop-in group-level intervention for SGM youth. Each 3-hour Hatch Youth meeting consists of a social, educational, and youth-led support hour. Over 14 weeks, these meetings were randomly observed and individual interviews with participating youth ( n = 12) and staff and volunteers ( n = 12) were conducted; data underwent a content analysis. Participants perceived an increase in confidence and self-esteem through enhanced bonding with family and friends, a sense of belonging, and community empowerment because of their involvement with Hatch Youth, suggesting drop-in centers can strengthen secondary social ties and improve confidence and self-esteem.

  20. Passivity Enhancement of Grid-Tied Converter by Series LC-Filtered Active Damper

    DEFF Research Database (Denmark)

    Bai, Haofeng; Wang, Xiongfei; Loh, Poh Chiang

    2015-01-01

    Series LC-filtered active damper can be used to stabilize the grid-tied voltage source converter in a non-ideal grid. The operation principle of the active damper is to mimic a damping resistance at the resonance frequencies. However, the selection of the damping resistance has not received much...... attention. Also, parasitic capacitance of the grid transmission line brings new challenge for the application of an active damper, which has not been discussed before. In order to fill these gaps, this paper first analyzes the stability of a grid-tied converter with the help of passivity. Based...... on the passivity-based-stability analysis, a damping resistance selection method is proposed. Then, an admittance shaping method is developed to ensure the system stability in the presence of parasitic capacitance of the transmission line. Finally, experimental results are provided to show the validity...

  1. Silicon-on-insulator field effect transistor with improved body ties for rad-hard applications

    Science.gov (United States)

    Schwank, James R.; Shaneyfelt, Marty R.; Draper, Bruce L.; Dodd, Paul E.

    2001-01-01

    A silicon-on-insulator (SOI) field-effect transistor (FET) and a method for making the same are disclosed. The SOI FET is characterized by a source which extends only partially (e.g. about half-way) through the active layer wherein the transistor is formed. Additionally, a minimal-area body tie contact is provided with a short-circuit electrical connection to the source for reducing floating body effects. The body tie contact improves the electrical characteristics of the transistor and also provides an improved single-event-upset (SEU) radiation hardness of the device for terrestrial and space applications. The SOI FET also provides an improvement in total-dose radiation hardness as compared to conventional SOI transistors fabricated without a specially prepared hardened buried oxide layer. Complementary n-channel and p-channel SOI FETs can be fabricated according to the present invention to form integrated circuits (ICs) for commercial and military applications.

  2. UWB Bi-directional Bow-tie antenna loaded by rings

    Science.gov (United States)

    Peng, Lin; Sun, Kai; Xie, Ji-yang; Qiu, Yu-jie; Jiang, Xing

    2016-07-01

    Performances of bow-tie antennae can be improved by loading a ring. Specially, the distorted radiation patterns of the reference bow-tie antenna (RBA) at high frequencies become less distorted when a ring is added. That is due to the disciplined current flows trained by the ring. Furthermore, when more rings are loaded, which act as reflectors, higher directivities are obtained and, patterns become bi-directional. Antennae with no ring (RBA), one ring, two rings (three cases), three rings, and four rings are investigated. Research find that loading more rings means better directivity. The directivity of the RBA varies from 2.29 dB to 3.66 dB for the frequency band from 2.5 to 7.5 GHz while the directivity for the four-ring-loaded case varies from 4.27 dB to 7.61 dB in that frequency band.

  3. Can Social Ties be Harmful? Examining the Spread of Suicide in Early Adulthood

    Science.gov (United States)

    Mueller, Anna S.; Abrutyn, Seth; Stockton, Cynthia

    2015-01-01

    Durkheim posited that social relationships protect individuals against suicide; however, substantial research demonstrates that suicide can spread through the very ties Durkheim theorized as protective. With this study, we use Waves I, III, and IV of the National Longitudinal Study of Adolescent Health, to investigate whether young adults’ suicide attempts and thoughts are in part products of exposure to suicidal behaviors via their social relationships. We find that young adults who have had family members or friends attempt suicide are more likely to report suicide ideation or even suicide attempts, over both the short and long run. This finding is robust to many important controls for risk and protective factors for suicide. Our findings have implications for the sociology of suicide, not the least of which, is that social ties have the power to harm in addition to the power to protect. PMID:26120243

  4. FAILURES AND DEFECTS IN THE BUILDING PROCESS – APPLYING THE BOW-TIE APPROACH

    DEFF Research Database (Denmark)

    Jørgensen, Kirsten

    2009-01-01

    site was observed from the very start to the very end and all failures and defects of a certain size were recorded and analysed. The methodological approach used in this analysis was the bow-tie model from the area of safety research. It combines critical-event analysis for both causes and effects...... with event-tree analysis. The paper describes this analytical approach as an introduction to a new concept for understanding failures and defects in construction. Analysing the many critical events in the building process with the bow-tie model visualises the complexity of causes. This visualisation offers...... the possibility for a much more direct and focused discussion of what needs doing, by whom and when – not only to avoid the number of defects in the final product, but also to make the building process flow much better and reduce the need for damage control....

  5. Utility-scale grid-tied PV inverter reliability workshop summary report.

    Energy Technology Data Exchange (ETDEWEB)

    Granata, Jennifer E.; Quintana, Michael A.; Tasca, Coryne Adelle (SRA International, Inc., Fairfax, VA); Atcitty, Stanley

    2011-07-01

    A key to the long-term success of the photovoltaic (PV) industry is confidence in the reliability of PV systems. Inverters are the most commonly noted cause of PV system incidents triggered in the field. While not all of these incidents are reliability-related or even necessarily failures, they still result in a loss of generated power. With support from the U.S. Department of Energy's Solar Energy Technologies Program, Sandia National Laboratories organized a Utility-Scale Grid-Tied Inverter Reliability Workshop in Albuquerque, New Mexico, January 27-28, 2011. The workshop addressed the reliability of large (100-kilowatt+) grid-tied inverters and the implications when such inverters fail, evaluated inverter codes and standards, and provided discussion about opportunities to enhance inverter reliability. This report summarizes discussions and presentations from the workshop and identifies opportunities for future efforts.

  6. Dendrometer bands made easy: using modified cable ties to measure incremental growth of trees

    Science.gov (United States)

    Anemaet, Evelyn R.; Middleton, Beth A.

    2013-01-01

    Dendrometer bands are a useful way to make sequential repeated measurements of tree growth, but traditional dendrometer bands can be expensive, time consuming, and difficult to construct in the field. An alternative to the traditional method of band construction is to adapt commercially available materials. This paper describes how to construct and install dendrometer bands using smooth-edged, stainless steel, cable tie banding and attachable rollerball heads. As a performance comparison, both traditional and cable tie dendrometer bands were installed on baldcypress trees at the National Wetlands Research Center in Lafayette, Louisiana, by both an experienced and a novice worker. Band installation times were recorded, and growth of the trees as estimated by the two band types was measured after approximately one year, demonstrating equivalence of the two methods. This efficient approach to dendrometer band construction can help advance the knowledge of long-term tree growth in ecological studies.

  7. Can Social Ties be Harmful? Examining the Spread of Suicide in Early Adulthood.

    Science.gov (United States)

    Mueller, Anna S; Abrutyn, Seth; Stockton, Cynthia

    2015-06-01

    Durkheim posited that social relationships protect individuals against suicide; however, substantial research demonstrates that suicide can spread through the very ties Durkheim theorized as protective. With this study, we use Waves I, III, and IV of the National Longitudinal Study of Adolescent Health, to investigate whether young adults' suicide attempts and thoughts are in part products of exposure to suicidal behaviors via their social relationships. We find that young adults who have had family members or friends attempt suicide are more likely to report suicide ideation or even suicide attempts, over both the short and long run. This finding is robust to many important controls for risk and protective factors for suicide. Our findings have implications for the sociology of suicide, not the least of which, is that social ties have the power to harm in addition to the power to protect.

  8. Analysis of Silver Ink Bow-Tie RFID Tag Antennas Printed on Paper Substrates

    Directory of Open Access Journals (Sweden)

    Sari Merilampi

    2007-01-01

    Full Text Available In this study, polymeric silver inks, paper substrates, and screen printing were used to produce prototype Bow-Tie tags. Because of increasing interest in applying passive UHF-RFID systems in paper industry, the Bow-Tie antenna used in this study was designed to work through paper. The maximum reliable read ranges of the tags were measured thorough stacked paper and also in air. The analysis and functioning of the antenna design are also discussed. All inks and paper substrates were suitable as antenna material and the prototype tag antennas had good reading performance. The maximum reliable read ranges were quite the same as for copper and aluminum tags studied elsewhere. This means that printed UHF tags are competitive solutions for the identification of simple mass products.

  9. Cultural and historical heritage: An asset for city branding

    Directory of Open Access Journals (Sweden)

    Cvijić Siniša

    2013-01-01

    Full Text Available Achieving wider recognition is part of the development agenda of contemporary cities, which are all confronted with the need to stand out and compete against one another. City branding reads as and plays an important role in this struggle for recognition. The identity of a city is generated over a long period, as it undergoes historical change, resulting in cultural diversity as the product of a specific environment. This paper discusses the possibility of using the cultural and historical heritage of Trebinje and its identity as an asset to create its city brand. Trebinje is a small city situated in the vicinity of Dubrovnik, a major tourist destination with a rich cultural and historical heritage and an excellent city brand. Dubrovnik may be seen as jeopardising the development of Trebinje’s authentic identity; on the other hand, the strong historical ties between the two cities can actually be used as an asset to develop Trebinje’s city brand. The material and non-material heritage which helped the formation of Trebinje’s identity, is analysed. The Mediterranean region in which it is located, its rich history, authentic architecture and different cultural influences, including the national poet Jovan Dučić, have all helped create Trebinje’s genius loci. The same factors may be used to communicate its new image. After that, the paper outlines models of the possible use of the recognised assets to brand the city and emphasise the importance of the effective presentation of these assets for creating a recognisable city image. It also proposes specific actions and interventions that may contribute to branding the city.

  10. Circulating angiopoietin-2 and soluble Tie-2 in type 2 diabetes mellitus: a cross-sectional study

    Directory of Open Access Journals (Sweden)

    Wagner Ludwig

    2011-06-01

    Full Text Available Abstract Background Type 2 diabetes is associated with increased levels of Angiopoietin-2 (Ang-2 and soluble Tie-2 (sTie-2, but its impact on vascular disease is still unknown. This study aimed to further explore the associations of Ang-2 and sTie-2 with metabolic control and diabetic complications. Methods In a cross-sectional designed study, levels of Ang-2 and sTie-2 as well as their relationships to cardiometabolic parameters were determined in 80 type 2 diabetic subjects (age 65 ± 7 years, female 47.4%. Results After controlling for age and BMI, Ang-2 levels were associated with levels of sTie-2, diastolic blood pressure, plasma insulin, homeostasis model assessment of insulin resistance (HOMA-IR, creatinine, glomerular filtration rate (GFR, and gamma-glutamyl transferase (GGT (all p 1c, fasting plasma glucose and insulin, HOMA-IR, triglyceride, and liver function parameters (all p 1c, insulin levels, and HOMA-IR (p Conclusions Ang-2 is independently associated with levels of GGT while sTie-2 is independently associated with levels of HbA1c, plasma insulin and HOMA-IR in type 2 diabetic subjects. Therefore we suggest that the associations of Ang-2 and sTie-2 with type 2 diabetes are based on different patho-physiological mechanisms.

  11. Religious and Non-religious Activity Engagement as Assets in Promoting Social Ties Throughout University: The Role of Emotion Regulation.

    Science.gov (United States)

    Semplonius, Thalia; Good, Marie; Willoughby, Teena

    2015-08-01

    Emerging adulthood is a time of many changes. For example, one change that occurs for a subset of emerging adults is leaving home and starting university. Importantly, the creation of social ties can aid in promoting positive adjustment during university. This study investigated whether involvement in religious activities promotes social ties among university students directly and/or indirectly through emotion regulation. Importantly, involvement in religious activities may promote self-regulatory skills, and the ability to effectively regulate emotions can aid in navigating social interactions. To rule out potentially important confounding variables, spirituality and involvement in non-religious clubs were statistically controlled in all analyses. The participants included 1,132 university students (70.5 % female) from a university in Ontario, Canada who were surveyed each year over a period of 3 years. The results indicated that involvement in religious activities indirectly predicted more social ties over time through emotion regulation. Spirituality did not predict social ties or emotion regulation. Furthermore, non-religious clubs directly predicted more social ties over time. Thus, although involvement in religious and non-religious activities both predicted more social ties in a university setting over time, the mechanism by which these activities promote social ties differed.

  12. ESPRIT Based Robust Anti-Islanding Algorithm for Grid-Tied Inverter

    OpenAIRE

    Patra, Sandipan

    2016-01-01

    Abstract—This paper presents an anti-islanding protection scheme for a grid tied inverter. In this scheme, the oscillation variation in frequency is estimated by Estimation of Signal Parameters via Rotational Invariant Technique (ESPRIT). The proposed system is implemented in MATLAB and real time in OPAL-RT. Series of simulation results demonstrate that nondetection zone of proposed algorithm is negligible, and the scheme is also free from nuisance tripping to other transient events.

  13. Performance analysis of new type grid-tied inverter-Aalborg Inverter

    DEFF Research Database (Denmark)

    Wu, Weimin; Wang, Zhen; Ji, Junhao

    2014-01-01

    Aalborg Inverter is a grid-tied DC/AC inverter. In order to optimize the design, its power losses are analyzed in detail, combined with a description of the single-phase operating principle and the modulation strategy. A 2 kW / 220 V experimental prototype is constructed to verify the theoretical...... analysis. It is concluded that a minimize inductance in the power loop does help the inverter to achieve the high efficiency with the good dynamic performance....

  14. Effect of summer grazing on welfare of dairy cows reared in mountain tie-stall barns

    Directory of Open Access Journals (Sweden)

    Simonetta Dovier

    2010-09-01

    Full Text Available Traditional mountain farms have an important economic, social and environmental role. The Alps management system for dairy cows consists of animals kept indoors from autumn to spring, mostly in tie-stalls, and moved to mountain pasture in summer. The aim of our study was to assess the effect of mountain summer grazing on the welfare of dairy cows housed in tie-stall barns. Twenty-four farms were considered. In twelve of them, animals were reared in tie-stalls and moved to mountain pasture for three months in summer; they were visited three times: (i four weeks before grazing during the indoor period in the stall; (ii about three weeks after the start of grazing; and (iii in the stall, in autumn, at least three weeks after returning from grazing. The other twelve farms kept the animals in tie-stalls all year; they were visited once in autumn. Data were collected following a protocol that considers animal-based measures and structure information on the basis of Quality Welfare Consortium® indications. Data allowed the calculation of both the Animal Needs Index score (ANI 35L and an overall assessment of the cows’ welfare obtained from three general aspects: housing, animal’s physical condition, and animal’s behaviour. Summer grazing had a significant positive effect on injuries, lameness and animal’s rising duration but a negative effect on faeces consistency. Moreover, a reduction of tongue playing was observed. The ANI 35L and the overall assessment did not show significant differences linked to summer grazing, which tended to have a positive but temporary effect on animal behaviour.

  15. Tie-2 is overexpressed by monocytes in autoimmune thyroid disorders and participates in their recruitment to the thyroid gland.

    Science.gov (United States)

    Figueroa-Vega, Nicté; Alfonso-Pérez, Manuel; Cuesta-Mateos, Carlos; Sánchez-Madrid, Francisco; Moreno-Otero, Ricardo; González-Amaro, Roberto; Marazuela, Mónica

    2009-07-01

    The angiopoietin/Tie system seems to have an important role in the pathogenesis of inflammatory diseases. Although Tie-2 is mainly expressed by endothelium, it is also detected in monocytes, which participate in the development of angiogenic and inflammatory phenomena. The aim was to study the expression and function of Tie-2 and their ligands, angiopoietin-1 (Ang-1) and Ang-2, in thyroid glands and monocytes from patients with autoimmune thyroid disease (AITD). We studied the expression of Tie-2, Ang-1, and Ang-2 by immunohistochemical techniques in surgical thyroid tissues from 17 patients with Graves' disease, 8 with Hashimoto's thyroiditis, and 3 healthy glands. In addition, we explored the expression and function of Tie-2 in peripheral blood monocytes from 17 patients with Graves' disease, 11 with Hashimoto's thyroiditis, and 14 healthy controls. We found that the expression of Ang-1, Ang-2, and Tie-2 was up-regulated in thyroid glands from AITD patients. Flow cytometry, immunofluorescence, ELISA, and RT-PCR analyses confirmed the synthesis and release of Ang-1, Ang-2, and Tie-2 by thyroid follicular cells (TFC) from AITD patients. In addition, these patients showed increased levels of Tie-2(+) monocytes in the peripheral blood, which exhibited an enhanced chemotactic response to Ang-2 or autologous TFC. Our data suggest that the Ang/Tie-2 system, through the participation of blood vessels, inflammatory cells, and TFC, may have an important role in the recruitment of monocytes to the thyroid gland and the pathogenesis of the tissue damage seen in AITD.

  16. New insights into the clinical signs of supraventricular tachycardia: The "sign of lace-tying".

    Science.gov (United States)

    Blommaert, Dominique; Dormal, Fabien; Deceuninck, Olivier; Xhaet, Olivier; Ballant, Elisabeth; De Roy, Luc

    2018-01-01

    Supraventricular tachycardias (SVT) are a common arrhythmia therefore an accurate diagnosis is of clinical importance. Although an ECG performed during tachycardia greatly aids diagnosis, patient history and predisposing factors also improve diagnostic accuracy. This prospective study included 100 consecutive patients undergoing electrophysiological study for SVT with the aim to reassess their clinical characteristics and describe frequent predisposing factors, such as the "sign of lace-tying" that to our knowledge has not previously been reported. Each patient completed an extensive questionnaire (70 questions) during their hospital stay. Our series comprised: 67% of patients with atrioventricular nodal reentrant tachycardia (AVNRT); 24% with an accessory pathway; and 9% presented atrial tachycardia. Half of the population were male and 29% of the cohort presented hypertension. Syncope during tachycardia appeared in 15% of patients, dizziness in 52% and thoracic pain in 59%. We encountered a predisposing risk factor for SVT in 53% of cases; with 32% exhibiting an anteflexion of the trunk termed the "sign of lace-tying." Data also showed that younger patients tended to present AVRT and regular pounding in the neck appeared only in patients with AVNRT. Overall, our study has highlighted the importance of considering clinical signs and patient characteristics both before and during SVT for the precise diagnosis of paroxysmal SVT. Furthermore, 32% of patients presented the "sign of lace-tying" or body position change before SVT, implying a diagnosis of SVT. © 2017 Wiley Periodicals, Inc.

  17. Understanding the process of social network evolution: Online-offline integrated analysis of social tie formation.

    Science.gov (United States)

    Kwak, Doyeon; Kim, Wonjoon

    2017-01-01

    It is important to consider the interweaving nature of online and offline social networks when we examine social network evolution. However, it is difficult to find any research that examines the process of social tie formation from an integrated perspective. In our study, we quantitatively measure offline interactions and examine the corresponding evolution of online social network in order to understand the significance of interrelationship between online and offline social factors in generating social ties. We analyze the radio signal strength indicator sensor data from a series of social events to understand offline interactions among the participants and measure the structural attributes of their existing online Facebook social networks. By monitoring the changes in their online social networks before and after offline interactions in a series of social events, we verify that the ability to develop an offline interaction into an online friendship is tied to the number of social connections that participants previously had, while the presence of shared mutual friends between a pair of participants disrupts potential new connections within the pre-designed offline social events. Thus, while our integrative approach enables us to confirm the theory of preferential attachment in the process of network formation, the common neighbor theory is not supported. Our dual-dimensional network analysis allows us to observe the actual process of social network evolution rather than to make predictions based on the assumption of self-organizing networks.

  18. Improvement and Application of the Softened Strut-and-Tie Model

    Science.gov (United States)

    Fan, Guoxi; Wang, Debin; Diao, Yuhong; Shang, Huaishuai; Tang, Xiaocheng; Sun, Hai

    2017-11-01

    Previous experimental researches indicate that reinforced concrete beam-column joints play an important role in the mechanical properties of moment resisting frame structures, so as to require proper design. The aims of this paper are to predict the joint carrying capacity and cracks development theoretically. Thus, a rational model needs to be developed. Based on the former considerations, the softened strut-and-tie model is selected to be introduced and analyzed. Four adjustments including modifications of the depth of the diagonal strut, the inclination angle of diagonal compression strut, the smeared stress of mild steel bars embedded in concrete, as well as the softening coefficient are made. After that, the carrying capacity of beam-column joint and cracks development are predicted using the improved softened strut-and-tie model. Based on the test results, it is not difficult to find that the improved softened strut-and-tie model can be used to predict the joint carrying capacity and cracks development with sufficient accuracy.

  19. Relational benefits and quality of relation – towards understanding of the ties between science and business

    Directory of Open Access Journals (Sweden)

    Małgorzata Grzegorczyk

    2016-06-01

    Full Text Available The goal of this article is to answer the question in what way relational marketing and in particular, the concept of relational benefits, as well as quality of relation may influence the transfer of knowledge and technologies from universities to business. Another goal is to highlight significant, future directions of research in this area. Integration of the theory of relational marketing and technology transfer may create a new framework for fuller understanding of the ties between science and business. Research in this area may contribute to the expansion and development of the theory of relational marketing, which until now was limited to the analysis of relations within a single sector. The results of conducted research show that ties characterized by high relational engagement are common, recognized by both academic and business environment as precious and play an important role in stimulating innovations. The quality of relations and relational benefits may play an important role in building long-term ties between universities and the industry. Integration of behavioural theories with the theory of technology transfer may contribute to a better understanding of the behaviour of particular participants of the transfer on the individual level.

  20. Stories of Change: TieVie - The Support Service for Finnish Universities Toward the Information Society

    Science.gov (United States)

    Kairamo, Anna-Kaarina; Sinko, Matti

    In this article, the authors discuss and evaluate the TieVie capacity building project for Finnish universities in a larger historical context of strategic developments in the use of information and communications technology (ICT) in learning. The TieVie project was a support service project for the Finnish Virtual University (FVU) which offered training in the educational use of ICT to the staff of Finnish universities in 2001-2008. It was financed by the Ministry of Education as part of the Virtual University project funding till the end of 2006. During 2007-2008, the program was fee-funded. The project was designed and implemented by the educational development support service units of five universities: Universities of Oulu, Turku, Jyväskylä, and Helsinki, and Helsinki University of Technology. The TieVie project was launched on the basis of the need to strengthen the e-Learning skills and expertise among Finnish university staff. This need was recognized in the national strategy for education, training, and research in the information society outlined by the Ministry of Education in 2000.

  1. A Tie-Over Dressing Using a Silicone Tube to Graft Deep Wounds

    Directory of Open Access Journals (Sweden)

    Cem Inan Bektas

    2013-11-01

    Full Text Available BackgroundThe most common cause of skin graft failure is the collection of blood or serous fluid underneath the graft. In our study, we describe the use of silicone tube for tie-over dressing to secure the skin graft margins with the aim of decreasing loss of the skin graft, particularly in grafting of deep wounds.MethodsBetween March 2008 and July 2011, we used this technique in 17 patients with skin defects with depths ranging from 3.5 to 8 mm (mean, 5.5 mm. First, the skin graft was sutured with 3/0 silk suture material from its corners. Then, a silicone round drain tube was sutured with 3/0 absorbable polyglactin 910 over the margins of the graft. Finally, long silk threads were tied over the bolus dressing, and the tie-over dressing was completed in the usual fashion.ResultsThe mean follow-up was 7 months (range, 2-10 months in the outpatient clinic. Graft loss on the graft margins due to hematoma or seroma was not developed. The results of adhesion between the graft and wound bed peripherally was excellent.ConclusionsIn our study, we suggest that use of a silicone tube for additional pressure on the edges of skin grafts in case of reconstruction of deep skin defects.

  2. One Step Solution to the Local Tie Vectors of GNSS/SLR in ITRF

    Directory of Open Access Journals (Sweden)

    MA Xiaping

    2018-01-01

    Full Text Available This paper proposes a one-step solution of local tie vectors,the solution takes RP (Reference Point and axes offsets of SLR telescope as unknown parameters,GNSS baselines network and conventional terrestrial observation (horizontal,vertical angle and distance are combined in ITRF (International Terrestrial Reference Frame,and multiply constraint conditions are established between RP and observation marks and two axes offsets.Local tie vectors and related covariance matrices of the 3 co-located sites in Beijing,Kunming,Xi'an of CMONOC (Crustal Movement Observation Network of China are solved with the proposed one step solution.The results show that the RMS (root mean square error of local tie vectors is less than 2.0 mm.Besides,the differences are less than 2.0 mm compared with the traditional step by step solution,and the offsets and corresponding RMS between the horizontal axis and vertical axis are 3.8 mm,0.7 mm,3.6 mm and 1.3 mm,1.2 mm,1.3 mm,respectively.

  3. Risk analysis of urban gas pipeline network based on improved bow-tie model

    Science.gov (United States)

    Hao, M. J.; You, Q. J.; Yue, Z.

    2017-11-01

    Gas pipeline network is a major hazard source in urban areas. In the event of an accident, there could be grave consequences. In order to understand more clearly the causes and consequences of gas pipeline network accidents, and to develop prevention and mitigation measures, the author puts forward the application of improved bow-tie model to analyze risks of urban gas pipeline network. The improved bow-tie model analyzes accident causes from four aspects: human, materials, environment and management; it also analyzes the consequences from four aspects: casualty, property loss, environment and society. Then it quantifies the causes and consequences. Risk identification, risk analysis, risk assessment, risk control, and risk management will be clearly shown in the model figures. Then it can suggest prevention and mitigation measures accordingly to help reduce accident rate of gas pipeline network. The results show that the whole process of an accident can be visually investigated using the bow-tie model. It can also provide reasons for and predict consequences of an unfortunate event. It is of great significance in order to analyze leakage failure of gas pipeline network.

  4. Tissue reactions induced by nylon cable tie used to clamp ovarian pedicles

    Directory of Open Access Journals (Sweden)

    Luiz Fernando Moraes Moreira

    2018-03-01

    Full Text Available The aim of this study was to evaluate the tissue reactions induced by nylon cable tie by using macroscopic and histological evaluations. Forty-five clinically healthy crossbreed female dogs, 31.11 ± 14.26 months old and with a body weight of 11.26 ± 4.7 kg, underwent ovariohysterectomy using a minimally invasive procedure. The dogs were randomly divided into three groups of 15 animals each and were evaluated preoperatively, and at 30 (G1, 60 (G2 and 90 days (G3 after surgery. The histological examination of the pedicles containing the nylon cable ties, collected from five animals in each group, showed a chronic inflammatory reaction with the presence of macrophages, giant cells and fibroplasia on the 30th postoperative day. Well-organized connective tissue and presence of lymphocytes and polymorphonuclear leukocytes were seen on the 60th postoperative day, and mature connective tissue and presence of macrophages and lymphocytes were seen at 90 days. Nylon cable ties induce an inflammatory reaction, which should be considered due to the risk of interference with surrounding structures.

  5. Finite element analyses of continuous filament ties for masonry applications : final report for the Arquin Corporation.

    Energy Technology Data Exchange (ETDEWEB)

    Quinones, Armando, Sr. (Arquin Corporation, La Luz, NM); Bibeau, Tiffany A.; Ho, Clifford Kuofei

    2008-08-01

    Finite-element analyses were performed to simulate the response of a hypothetical vertical masonry wall subject to different lateral loads with and without continuous horizontal filament ties laid between rows of concrete blocks. A static loading analysis and cost comparison were also performed to evaluate optimal materials and designs for the spacers affixed to the filaments. Results showed that polypropylene, ABS, and polyethylene (high density) were suitable materials for the spacers based on performance and cost, and the short T-spacer design was optimal based on its performance and functionality. Simulations of vertical walls subject to static loads representing 100 mph winds (0.2 psi) and a seismic event (0.66 psi) showed that the simulated walls performed similarly and adequately when subject to these loads with and without the ties. Additional simulations and tests are required to assess the performance of actual walls with and without the ties under greater loads and more realistic conditions (e.g., cracks, non-linear response).

  6. Metabolic flexibility of the Fe(II)-oxidizing phototropic strain Rhodopseudomonas palustris TIE1 and its potential role in microbial iron cycling

    Science.gov (United States)

    Schmidt, C.; Oswald, K.; Melton, E. D.; Kappler, A.

    2012-04-01

    The biogeochemical conversion of iron(II) and iron(III) is widespread in many aquatic and terrestrial environments. In the anoxic regime of soils and sediments the conversion and alternation of the iron redox state is predominantly run by microorganisms that are thought to gain life-sustaining energy by the oxidation and/or reduction of ferrous/ferric components. The spatial arrangement of microbial iron(II) oxidation and iron(III) reduction is largely controlled by the availability of the required electron acceptor and electron donor, as well as the essential source of energy (i.e. light or chemical energy). The physico-chemical patterns of many microbial environments undergo dynamic variations (i.e. diurnal and seasonal changes) as a function of natural external forces (i.e. seasonality, storm events, algae blooms) which strongly affects the local budget of organic carbon and nutrients, as well as the day light penetration. Such fluctuations force microorganisms either to follow the flow of substrate or to switch their metabolism to alternative electron acceptors and/or donors. Different photoferrotrophic bacteria have been shown to be able to grow either on organic (heterotrophic) or inorganic (autotrophic) substrates while exploiting light as their energy source. Within the frame of this study the preference for organic substrates (lactate and acetate) and/or ferrous iron (in simultaneous presence) for photo(ferro)trophic growth of Rhodopseudomonas palustris TIE1 has been investigated in detail. Rates of iron oxidation, acetate/lactate consumption and growth have been followed over time as a function of different lactate to acetate to iron(II) ratios. Additional experiments have been designed to evaluate the potential of Rhodopseudomonas palustris TIE1 to contribute to the redox cycling of iron. TIE1 has been grown in a batch set-up in which the iron(III)-reducing strain Shewanella oneidensis MR1 has been incubated at different ferrihydrite concentrations in

  7. Keeping the market at bay: exploring the loci of innovation in the cultural industries

    NARCIS (Netherlands)

    Brandellero, A.M.C.; Kloosterman, R.C.

    2010-01-01

    Cultural industries are activities concerned with the production and marketing of goods and services that have aesthetic or semiotic content (SCOTT 2004). Their emergence as engines of economic growth reflects an economic and cultural conjuncture where commodity production has become tied in with

  8. Fecal culture

    Science.gov (United States)

    ... parasites exam Alternative Names Stool culture; Culture - stool; Gastroenteritis fecal culture Images Salmonella typhi organism Yersinia enterocolitica organism Campylobacter jejuni organism Clostridium difficile organism References Beavis, KG, ...

  9. Getting the word out on Twitter: the role of influentials, information brokers and strong ties in building word-of-mouth for brands

    NARCIS (Netherlands)

    Araujo, T.; Neijens, P.; Vliegenthart, R.

    2017-01-01

    Using a sample of over 5300 tweets from top global brands, this study investigated how different types of users can influence brand content diffusion via retweets. Twitter users who influenced followers to retweet brand content were categorized as (1) influentials, because of their above average

  10. The SNAP Strong Lens Survey

    Energy Technology Data Exchange (ETDEWEB)

    Marshall, P.

    2005-01-03

    Basic considerations of lens detection and identification indicate that a wide field survey of the types planned for weak lensing and Type Ia SNe with SNAP are close to optimal for the optical detection of strong lenses. Such a ''piggy-back'' survey might be expected even pessimistically to provide a catalogue of a few thousand new strong lenses, with the numbers dominated by systems of faint blue galaxies lensed by foreground ellipticals. After sketching out our strategy for detecting and measuring these galaxy lenses using the SNAP images, we discuss some of the scientific applications of such a large sample of gravitational lenses: in particular we comment on the partition of information between lens structure, the source population properties and cosmology. Understanding this partitioning is key to assessing strong lens cosmography's value as a cosmological probe.

  11. Strong coupling phase in QED

    International Nuclear Information System (INIS)

    Aoki, Ken-ichi

    1988-01-01

    Existence of a strong coupling phase in QED has been suggested in solutions of the Schwinger-Dyson equation and in Monte Carlo simulation of lattice QED. In this article we recapitulate the previous arguments, and formulate the problem in the modern framework of the renormalization theory, Wilsonian renormalization. This scheme of renormalization gives the best understanding of the basic structure of a field theory especially when it has a multi-phase structure. We resolve some misleading arguments in the previous literature. Then we set up a strategy to attack the strong phase, if any. We describe a trial; a coupled Schwinger-Dyson equation. Possible picture of the strong coupling phase QED is presented. (author)

  12. The blind faith deep water horizontal pipeline tie-in project

    Energy Technology Data Exchange (ETDEWEB)

    Charalambides, John Nicos [Oceaneering International, Inc., Houston, TX (United States)

    2009-12-19

    This presentation will concentrate on the design challenges, experience and learning from the SIT and offshore installation of two deepwater pipeline tie-ins using first-of-its-kind subsea technology and installation methodologies on the 'Blind Faith' project. The Blind Faith Subsea Tie-Ins join the Blind Faith oil and gas pipelines with the Canyon Chief gas pipeline and the Mountaineer oil pipeline in 5100 feet of water. Both of the Blind Faith oil and gas pipelines are terminated with conventional PLEMs providing a horizontal connector for the tie-in and a vertical connector for a future tie-in connection point. The connectors are ROV operable/installable clamp style connectors. The method of joining to the Canyon Chief oil and gas pipelines and the type of jumper employed are unique to the tie-in. An ROV operable / installable mechanical pipe end connector connects the bare ends of the Canyon Chief and Mountaineer pipelines. The mechanical pipe end connector is fitted with an integral clamp connector hub and rests on an ROV installed mud mat. After installation of the mechanical connector, metrology was performed to create a neutral state horizontal jumper for joining the mechanical connector hub and the Blind Faith PLEM. The neutral state horizontal jumper is a compliant 'Z-Bend' design. During installation the jumper was elastically pre-deformed using a bowstring system. Pre-deformation of the jumper provided installation clearances and facilitated the neutral stress state after installation. Once landed the jumper bowstring was relaxed, allowing the jumper to expand to fit between the hubs. After expansion and make-up, the clamp connectors were tightened via an ROV operated hydraulic torque wrench. A seal test verified the integrity of the connections. After installation the jumper remains in a minimal residual stress state atypical of most horizontal jumpers. The horizontal jumper was chosen over the vertical jumper because it provides a

  13. Video self-assessment of basic suturing and knot tying skills by novice trainees.

    Science.gov (United States)

    Hu, Yinin; Tiemann, Debbie; Michael Brunt, L

    2013-01-01

    Self-assessment is important to learning but few studies have utilized video self-assessment of basic surgical skills. We compared a video self-assessment of suturing and knot tying skills by novice trainees to the assessment by a senior attending surgeon. Sixteen senior medical students and 7 beginner surgical interns were video-recorded while performing five suturing and knot tying tasks. All videos were analyzed using an objective structured assessment of technical skills (OSATS) metrics (1-5 scale; 1 = novice, 5 = expert). Video self-assessment was carried out within 4 weeks of an instructional session and subsequently by one senior surgery instructor (blinded to the individual). Both a Global score and total combined OSATS scores were analyzed. Total possible OSATS scores were: interrupted suture-30, subcuticular closure-30, one and two-handed knot tying-25 each, tying in a restricted space 20; maximum combined score-130 points). Confidence levels in performing the tasks pre-test and the value of video self-assessment were rated on a 1-5 Likert scale (1 = low and 5 = high). Data are mean±SD and statistical significance was evaluated using Friedman's test. Self-assessment scoring was significantly higher than the assessment by a senior instructor for three tasks by global score and all five tasks by combined OSATS score (self-assessment 71.8±16.7 vs attending assessment 56.7±11.0, p = 0.007). Mean self-assessment Global scores ranged from 2.5 to 2.8 for all tasks performed compared to 1.8-2.3 for attending surgeon assessment (pvideo self-assessment was rated as a highly valuable (mean 4.3±0.8) component to skills training. Novice trainees over-estimate their basic technical skills performance compared to the assessment by a senior surgeon. Video self-assessment may be a valuable addition to a pre-residency and surgical internship preparatory curriculum in basic suturing and knot tying. Copyright © 2013 Association of Program Directors in Surgery. Published

  14. OPTIMIZING THE DISTRIBUTION OF TIE POINTS FOR THE BUNDLE ADJUSTMENT OF HRSC IMAGE MOSAICS

    Directory of Open Access Journals (Sweden)

    J. Bostelmann

    2017-07-01

    Full Text Available For a systematic mapping of the Martian surface, the Mars Express orbiter is equipped with a multi-line scanner: Since the beginning of 2004 the High Resolution Stereo Camera (HRSC regularly acquires long image strips. By now more than 4,000 strips covering nearly the whole planet are available. Due to the nine channels, each with different viewing direction, and partly with different optical filters, each strip provides 3D and color information and allows the generation of digital terrain models (DTMs and orthophotos. To map larger regions, neighboring HRSC strips can be combined to build DTM and orthophoto mosaics. The global mapping scheme Mars Chart 30 is used to define the extent of these mosaics. In order to avoid unreasonably large data volumes, each MC-30 tile is divided into two parts, combining about 90 strips each. To ensure a seamless fit of these strips, several radiometric and geometric corrections are applied in the photogrammetric process. A simultaneous bundle adjustment of all strips as a block is carried out to estimate their precise exterior orientation. Because size, position, resolution and image quality of the strips in these blocks are heterogeneous, also the quality and distribution of the tie points vary. In absence of ground control points, heights of a global terrain model are used as reference information, and for this task a regular distribution of these tie points is preferable. Besides, their total number should be limited because of computational reasons. In this paper, we present an algorithm, which optimizes the distribution of tie points under these constraints. A large number of tie points used as input is reduced without affecting the geometric stability of the block by preserving connections between strips. This stability is achieved by using a regular grid in object space and discarding, for each grid cell, points which are redundant for the block adjustment. The set of tie points, filtered by the

  15. Design of a Glenn Research Center Solar Field Grid-Tied Photovoltaic Power System

    Science.gov (United States)

    Eichenberg, Dennis J.

    2009-01-01

    The NASA Glenn Research Center (GRC) designed, developed, and installed, a 37.5 kW DC photovoltaic (PV) Solar Field in the GRC West Area in the 1970s for the purpose of testing PV panels for various space and terrestrial applications. The PV panels are arranged to provide a nominal 120 VDC. The GRC Solar Field has been extremely successful in meeting its mission. The PV panels and the supporting electrical systems are all near their end of life. GRC has designed a 72 kW DC grid-tied PV power system to replace the existing GRC West Area Solar Field. The 72 kW DC grid-tied PV power system will provide DC solar power for GRC PV testing applications, and provide AC facility power for all times that research power is not required. A grid-tied system is connected directly to the utility distribution grid. Facility power can be obtained from the utility system as normal. The PV system is synchronized with the utility system to provide power for the facility, and excess power is provided to the utility for use by all. The project transfers space technology to terrestrial use via nontraditional partners. GRC personnel glean valuable experience with PV power systems that are directly applicable to various space power systems, and provide valuable space program test data. PV power systems help to reduce harmful emissions and reduce the Nation s dependence on fossil fuels. Power generated by the PV system reduces the GRC utility demand, and the surplus power aids the community. Present global energy concerns reinforce the need for the development of alternative energy systems. Modern PV panels are readily available, reliable, efficient, and economical with a life expectancy of at least 25 years. Modern electronics has been the enabling technology behind grid-tied power systems, making them safe, reliable, efficient, and economical with a life expectancy of at least 25 years. The report concludes that the GRC West Area grid-tied PV power system design is viable for a reliable

  16. 360° virtual reality video for the acquisition of knot tying skills: A randomised controlled trial.

    Science.gov (United States)

    Yoganathan, S; Finch, D A; Parkin, E; Pollard, J

    2018-04-10

    360° virtual reality (VR) video is an exciting and evolving field. Current technology promotes a totally immersive, 3-dimensional (3D), 360° experience anywhere in the world using simply a smart phone and virtual reality headset. The potential for its application in the field of surgical education is enormous. The aim of this study was to determine knot tying skills taught with a 360-degree VR video compared to conventional 2D video teaching. This trial was a prospective, randomised controlled study. 40 foundation year doctors (first year postgraduate) were randomised to either the 360-degree VR video (n = 20) or 2D video teaching (n = 20). Participants were given 15 min to watch their allocated video. Ability to tie a single handed reef knot was then assessed against a marking criteria developed for the Royal College of Surgeons, England, (RCSeng) Basic Surgical Skills (BSS) course, by a blinded assessor competent in knot tying. Each candidate then underwent further teaching using Peyton's four step model. Knot tying technique was then re-assessed. Knot tying scores were significantly better in the VR video teaching arm when compared with conventional (median knot score 5.0 vs 4.0 p = 0.04). When used in combination with face to face skills teaching this difference persisted (median knot score 9.5 vs 9.0 p = 0.01). More people in the VR arm constructed a complete reef knot than in the 2D arm following face to face teaching (17/20 vs 12/20). No difference between the groups existed in the time taken to construct a reef knot following video and teaching (median time 31.0s vs 30.5s p = 0.89). This study shows there is significant merit in the application of 360-degree VR video technology in surgical training, both as an independent teaching aid and when used as an adjunct to traditional face to face teaching. Copyright © 2018 IJS Publishing Group Ltd. Published by Elsevier Ltd. All rights reserved.

  17. Expression of VEGF receptors VEFGR-1 and VEGFR-2, angiopoietin receptors Tie-1 and Tie-2 in chorionic villi tree during early pregnancy.

    Directory of Open Access Journals (Sweden)

    Ramazan Demir

    2010-02-01

    Full Text Available The aim of this study was to determine the expression of VEGF and its receptors in placentas from normal pregnancies between 22 days p.c. and 48 days p.c. of very early pregnancy. Placental tissues carried out from 19 pregnant women were examined. Immunohistochemical technique, electron microscopy were employed to evaluate the factors expression. In the new developing mesenchymal villi and immature intermediate villi VEGF and its receptors VEGFR-1 and VEGFR-2 immunoreactivity was detected in all the placental components, while in the stem villi and in the chorionic plate with large vessels only in some components. In the mesenchymal villi and immature intermediate villi VEGFR-1 and -2, and angiopoietin receptors Tie-1 and -2 immunoreactivity was dominantly observed in the heamangiogenic cells and cells cords, whereas the matured villi showed immunoreactivity only in other components. The ultrastructural findings were higher in respect to the all of the early pregnancy days. The placental samples from all of pregnancies, showed the VEGF and its receptors in optimal expression levels, whereas the angiopoietin receptors Tie-1 and -2 showed a higher expression levels in respect to other study factors. The receptors protein levels increased from the early days to the advanced days of gestation, but this alteration was not significant. The intensity of the immunolabeling for these proteins were not significant compared to to each other of gestatin days were examined. These findings demonstrated that a dysregulation of the placental expression of the VEGF and its receptors related to the different degrees of the gestational periods. Probably, this event may be related to complete vasculugenesis and angiogenesis in placental villi.

  18. Relationships between Total Quality Management Practices, Organizational Culture and Teacher’s Performance: Study from Seventh Day Adventist High Schools in West Indonesia

    Directory of Open Access Journals (Sweden)

    Ronny Buha Sihotang

    2013-08-01

    Full Text Available Teacher’s performance is the main key of school organization’s success. As the key, teachers’ genuineness is highlighted to be the most demanding of the school operations. They are actors, patrons, front liner workers, and models for the future. It shows that the role of teachers is the center of school operations. In the same situations, school operations are affected by school culture and quality management practices that enhance the teachers to do their duties properly. Teachers’ performances are tied to the culture and total quality management practices of the schools. The purpose of this research is to elaborate the relationships between implementation of total quality management practices, organizational culture and teacher’s performance. The research results indicate that there is a strong relationship between total quality management practices and teacher’s performance. Also there is a moderate relationship between organizational culture and teacher’s performance. While the relationship between total quality management and oganizationa culture is moderate relationship. Both total quality management practices and organizational culture positively and significantly affect teacher’s performance.

  19. The effect of cultural interaction on cumulative cultural evolution.

    Science.gov (United States)

    Nakahashi, Wataru

    2014-07-07

    Cultural transmission and cultural evolution are important for animals, especially for humans. I developed a new analytical model of cultural evolution, in which each newborn learns cultural traits from multiple individuals (exemplars) in parental generation, individually explores around learned cultural traits, judges the utility of known cultural traits, and adopts a mature cultural trait. Cultural evolutionary speed increases when individuals explore a wider range of cultural traits, accurately judge the skill level of cultural traits (strong direct bias), do not strongly conform to the population mean, increase the exploration range according to the variety of socially learned cultural traits (condition dependent exploration), and make smaller errors in social learning. Number of exemplars, population size, similarity of cultural traits between exemplars, and one-to-many transmission have little effect on cultural evolutionary speed. I also investigated how cultural interaction between two populations with different mean skill levels affects their cultural evolution. A population sometimes increases in skill level more if it encounters a less skilled population than if it does not encounter anyone. A less skilled population sometimes exceeds a more skilled population in skill level by cultural interaction between both populations. The appropriateness of this analytical method is confirmed by individual-based simulations. Copyright © 2014 Elsevier Ltd. All rights reserved.

  20. Ecotourism – conservation of the natural and cultural heritage

    OpenAIRE

    Cristina Barna; Manuela Epure; Ruxandra Vasilescu

    2011-01-01

    Sometimes the concept of ecotourism is widely misunderstood and it is often used as a marketing instrument in order to promote tourism businesses related to nature. Ecotourism means not only nature, it also includes indigenous cultures. It is about fostering respect for nature and for cultures, too. The true ecotourism represents only “responsible travel to natural areas that conserves the environment and improves the well-being of the local people” (TIES 1990). This paper clarifies the defin...

  1. Strong Decomposition of Random Variables

    DEFF Research Database (Denmark)

    Hoffmann-Jørgensen, Jørgen; Kagan, Abram M.; Pitt, Loren D.

    2007-01-01

    A random variable X is stongly decomposable if X=Y+Z where Y=Φ(X) and Z=X-Φ(X) are independent non-degenerated random variables (called the components). It is shown that at least one of the components is singular, and we derive a necessary and sufficient condition for strong decomposability...

  2. Strong interaction at finite temperature

    Indian Academy of Sciences (India)

    Abstract. We review two methods discussed in the literature to determine the effective parameters of strongly interacting particles as they move through a heat bath. The first one is the general method of chiral perturbation theory, which may be readily applied to this problem. The other is the method of thermal QCD sum rules ...

  3. Strong-strong beam-beam simulation on parallel computer

    Energy Technology Data Exchange (ETDEWEB)

    Qiang, Ji

    2004-08-02

    The beam-beam interaction puts a strong limit on the luminosity of the high energy storage ring colliders. At the interaction points, the electromagnetic fields generated by one beam focus or defocus the opposite beam. This can cause beam blowup and a reduction of luminosity. An accurate simulation of the beam-beam interaction is needed to help optimize the luminosity in high energy colliders.

  4. Strong-strong beam-beam simulation on parallel computer

    International Nuclear Information System (INIS)

    Qiang, Ji

    2004-01-01

    The beam-beam interaction puts a strong limit on the luminosity of the high energy storage ring colliders. At the interaction points, the electromagnetic fields generated by one beam focus or defocus the opposite beam. This can cause beam blowup and a reduction of luminosity. An accurate simulation of the beam-beam interaction is needed to help optimize the luminosity in high energy colliders

  5. Problematic Alcohol Use and Problem Gambling: Associations to Structural and Functional aspects of Social Ties in a Finnish Population Sample

    Directory of Open Access Journals (Sweden)

    Nordmyr Johanna

    2016-09-01

    Full Text Available AIMS – This study aims to explore associations between structural and functional aspects of social networks and relationships (here labelled social ties among individuals exhibiting problematic alcohol use and problem gambling, respectively.

  6. Creative benefits from well-connected leaders: leader social network ties as facilitators of employee radical creativity.

    Science.gov (United States)

    Venkataramani, Vijaya; Richter, Andreas W; Clarke, Ronald

    2014-09-01

    Employee radical creativity critically depends on substantive informational resources from others across the wider organization. We propose that the social network ties of employees' immediate leaders assume a central role in garnering these resources, thereby fostering their employees' radical creativity both independent of and interactively with employees' own network ties. Drawing on data from 214 employees working in 30 teams of a public technology and environmental services organization, we find that team leaders' betweenness centrality in the idea network within their teams as well as among their peer leaders provides creative benefits beyond employees' own internal and external ties. Further, employees' and leaders' ties within and external to the team interactively predict employee radical creativity. Implications for theory and practice are discussed. PsycINFO Database Record (c) 2014 APA, all rights reserved.

  7. PREFACE: Strongly correlated electron systems Strongly correlated electron systems

    Science.gov (United States)

    Saxena, Siddharth S.; Littlewood, P. B.

    2012-07-01

    This special section is dedicated to the Strongly Correlated Electron Systems Conference (SCES) 2011, which was held from 29 August-3 September 2011, in Cambridge, UK. SCES'2011 is dedicated to 100 years of superconductivity and covers a range of topics in the area of strongly correlated systems. The correlated electronic and magnetic materials featured include f-electron based heavy fermion intermetallics and d-electron based transition metal compounds. The selected papers derived from invited presentations seek to deepen our understanding of the rich physical phenomena that arise from correlation effects. The focus is on quantum phase transitions, non-Fermi liquid phenomena, quantum magnetism, unconventional superconductivity and metal-insulator transitions. Both experimental and theoretical work is presented. Based on fundamental advances in the understanding of electronic materials, much of 20th century materials physics was driven by miniaturisation and integration in the electronics industry to the current generation of nanometre scale devices. The achievements of this industry have brought unprecedented advances to society and well-being, and no doubt there is much further to go—note that this progress is founded on investments and studies in the fundamentals of condensed matter physics from more than 50 years ago. Nevertheless, the defining challenges for the 21st century will lie in the discovery in science, and deployment through engineering, of technologies that can deliver the scale needed to have an impact on the sustainability agenda. Thus the big developments in nanotechnology may lie not in the pursuit of yet smaller transistors, but in the design of new structures that can revolutionise the performance of solar cells, batteries, fuel cells, light-weight structural materials, refrigeration, water purification, etc. The science presented in the papers of this special section also highlights the underlying interest in energy-dense materials, which

  8. A Bibliometric Study on Culture Research in International Business

    Directory of Open Access Journals (Sweden)

    Claudia Frias Pinto

    2014-07-01

    Full Text Available National cultures and cultural differences provide a crucial component of the international business (IB research context. We conducted a bibliometric study of articles published in seven leading IB journals over a period of three decades to analyze how national culture has been impacting IB research. Co-citation mappings permit us to identify the ties binding works dealing with culture and cultural issues in IB. We identify two main clusters of research, each comprising two sub-clusters, with Hofstede’s (1980 work delineating much of the conceptual and empirical approach to culture-related studies. One main cluster entails works on the conceptualization of culture and its dimensions and the other cluster focuses on cultural distance. This conceptual framework captures the extant IB research incorporating culture-related concepts and influences.

  9. Effect of frenotomy on breastfeeding variables in infants with ankyloglossia (tongue-tie): a prospective before and after cohort study

    OpenAIRE

    Muldoon, Kathryn; Gallagher, Louise; McGuinness, Denise; Smith, Valerie

    2017-01-01

    Background Controversy exists regarding ankyloglossia (tongue-tie) and its clinical impact on breastfeeding, including the benefits, or otherwise, of tongue-tie release (frenotomy). As exclusive breastfeeding rates in Ireland are already considerably low (46% on discharge home from the maternity unit following birth in 2014), it is imperative to protect and support breastfeeding, including identifying the associated effects that frenotomy might have on breastfeeding variables. Objective To de...

  10. Creative benefits from well-connected leaders? Leader social network ties as facilitators of employee radical creativity

    OpenAIRE

    Venkataramani, V; Richter, Andreas Wilhelm; Clarke, R

    2014-01-01

    Employee radical creativity critically depends on substantive informational resources from others across the wider organization. We propose that the social network ties of employees’ immediate leaders assume a central role in garnering these resources, thereby fostering their employees’ radical creativity both independent of, and interactively with, employees’ own network ties. Drawing on data from 214 employees working in 30 teams of a public technology and environmental services organizatio...

  11. Assessment of the possible contribution of space ties on-board GNSS satellites to the terrestrial reference frame

    Science.gov (United States)

    Bruni, Sara; Rebischung, Paul; Zerbini, Susanna; Altamimi, Zuheir; Errico, Maddalena; Santi, Efisio

    2018-04-01

    The realization of the international terrestrial reference frame (ITRF) is currently based on the data provided by four space geodetic techniques. The accuracy of the different technique-dependent materializations of the frame physical parameters (origin and scale) varies according to the nature of the relevant observables and to the impact of technique-specific errors. A reliable computation of the ITRF requires combining the different inputs, so that the strengths of each technique can compensate for the weaknesses of the others. This combination, however, can only be performed providing some additional information which allows tying together the independent technique networks. At present, the links used for that purpose are topometric surveys (local/terrestrial ties) available at ITRF sites hosting instruments of different techniques. In principle, a possible alternative could be offered by spacecrafts accommodating the positioning payloads of multiple geodetic techniques realizing their co-location in orbit (space ties). In this paper, the GNSS-SLR space ties on-board GPS and GLONASS satellites are thoroughly examined in the framework of global reference frame computations. The investigation focuses on the quality of the realized physical frame parameters. According to the achieved results, the space ties on-board GNSS satellites cannot, at present, substitute terrestrial ties in the computation of the ITRF. The study is completed by a series of synthetic simulations investigating the impact that substantial improvements in the volume and quality of SLR observations to GNSS satellites would have on the precision of the GNSS frame parameters.

  12. Strongly correlated systems experimental techniques

    CERN Document Server

    Mancini, Ferdinando

    2015-01-01

    The continuous evolution and development of experimental techniques is at the basis of any fundamental achievement in modern physics. Strongly correlated systems (SCS), more than any other, need to be investigated through the greatest variety of experimental techniques in order to unveil and crosscheck the numerous and puzzling anomalous behaviors characterizing them. The study of SCS fostered the improvement of many old experimental techniques, but also the advent of many new ones just invented in order to analyze the complex behaviors of these systems. Many novel materials, with functional properties emerging from macroscopic quantum behaviors at the frontier of modern research in physics, chemistry and materials science, belong to this class of systems. The volume presents a representative collection of the modern experimental techniques specifically tailored for the analysis of strongly correlated systems. Any technique is presented in great detail by its own inventor or by one of the world-wide recognize...

  13. Strongly Correlated Systems Theoretical Methods

    CERN Document Server

    Avella, Adolfo

    2012-01-01

    The volume presents, for the very first time, an exhaustive collection of those modern theoretical methods specifically tailored for the analysis of Strongly Correlated Systems. Many novel materials, with functional properties emerging from macroscopic quantum behaviors at the frontier of modern research in physics, chemistry and materials science, belong to this class of systems. Any technique is presented in great detail by its own inventor or by one of the world-wide recognized main contributors. The exposition has a clear pedagogical cut and fully reports on the most relevant case study where the specific technique showed to be very successful in describing and enlightening the puzzling physics of a particular strongly correlated system. The book is intended for advanced graduate students and post-docs in the field as textbook and/or main reference, but also for other researchers in the field who appreciates consulting a single, but comprehensive, source or wishes to get acquainted, in a as painless as po...

  14. Strongly correlated systems numerical methods

    CERN Document Server

    Mancini, Ferdinando

    2013-01-01

    This volume presents, for the very first time, an exhaustive collection of those modern numerical methods specifically tailored for the analysis of Strongly Correlated Systems. Many novel materials, with functional properties emerging from macroscopic quantum behaviors at the frontier of modern research in physics, chemistry and material science, belong to this class of systems. Any technique is presented in great detail by its own inventor or by one of the world-wide recognized main contributors. The exposition has a clear pedagogical cut and fully reports on the most relevant case study where the specific technique showed to be very successful in describing and enlightening the puzzling physics of a particular strongly correlated system. The book is intended for advanced graduate students and post-docs in the field as textbook and/or main reference, but also for other researchers in the field who appreciate consulting a single, but comprehensive, source or wishes to get acquainted, in a as painless as possi...

  15. Strongly nonlinear oscillators analytical solutions

    CERN Document Server

    Cveticanin, Livija

    2014-01-01

    This book provides the presentation of the motion of pure nonlinear oscillatory systems and various solution procedures which give the approximate solutions of the strong nonlinear oscillator equations. The book presents the original author’s method for the analytical solution procedure of the pure nonlinear oscillator system. After an introduction, the physical explanation of the pure nonlinearity and of the pure nonlinear oscillator is given. The analytical solution for free and forced vibrations of the one-degree-of-freedom strong nonlinear system with constant and time variable parameter is considered. Special attention is given to the one and two mass oscillatory systems with two-degrees-of-freedom. The criteria for the deterministic chaos in ideal and non-ideal pure nonlinear oscillators are derived analytically. The method for suppressing chaos is developed. Important problems are discussed in didactic exercises. The book is self-consistent and suitable as a textbook for students and also for profess...

  16. Flavour Democracy in Strong Unification

    CERN Document Server

    Abel, S A; Abel, Steven; King, Steven

    1998-01-01

    We show that the fermion mass spectrum may naturally be understood in terms of flavour democratic fixed points in supersymmetric theories which have a large domain of attraction in the presence of "strong unification". Our approach provides an alternative to the approximate Yukawa texture zeroes of the Froggatt-Nielsen mechanism. We discuss a particular model based on a broken gauged $SU(3)_L\\times SU(3)_R$ family symmetry which illustrates our approach.

  17. Effect of Tower Shadow and Wind Shear in a Wind Farm on AC Tie-Line Power Oscillations of Interconnected Power Systems

    DEFF Research Database (Denmark)

    Tan, Jin; Hu, Weihao; Wang, Xiaoru

    2013-01-01

    This paper describes a frequency domain approach for evaluating the impact of tower shadow and wind shear effects (TSWS) on tie-line power oscillations. A simplified frequency domain model of an interconnected power system with a wind farm is developed. The transfer function, which relates the tie......-line power variation to the mechanical power variation of a wind turbine, and the expression of the maximum magnitude of tie-line power oscillations are derived to identify the resonant condition and evaluate the potential risk. The effects of the parameters on the resonant magnitude of the tie-line power...... are also discussed. The frequency domain analysis reveals that TSWS can excite large tie-line power oscillations if the frequency of TSWS approaches the tie-line resonant frequency, especially in the case that the wind farm is integrated into a relatively small grid and the tie-line of the interconnected...

  18. Cultural Resources Investigations of the East and West Bayou Sale Tie-In Levee, St. Mary Parish, Louisiana.

    Science.gov (United States)

    1998-10-01

    planter for the harvest and processing of a good crop (Maygarden et al. 1994). Generally speaking, bondage on the cane plantations of Louisiana had a...1994 Toward a Global Historical Archaeology: An Example from Brazil . Historical Archaeology 29(l):5-22. Orser, Charles E. and Theodore J. Karamanski...of Cane: Cuba, Brazil , and Louisiana after Emancipation. The American Historical Review 99(1):70-102. Shackel, Paul A. 1992 Modern Discipline: Its

  19. Tension in the tie-down chains of a shipping container for hazardous material

    International Nuclear Information System (INIS)

    Lo, T.Y.

    1995-01-01

    Chains are frequently used to tie the shipping containers of hazardous material to a truck bed. The tie-down system is nonlinear when the container is subjected to a triaxial force during transit. It is nonlinear because chains cannot carry compressive force, and the base of the container may partially lift off from the truck bed. A method was developed to calculate the amount of tension in the chains. This methodology includes three assumptions: (1) No friction exists between the container and the truck bed; (2) The container and the truck bed are rigid; and (3) All chains are properly tightened (i.e., no slacks) during preparation for shipment. The methodology employs an iterative process of a linear tie-down system. This linear system is derived from the nonlinear system with two additional assumptions: (a) All chains can carry compression as well as tension; and (b) There is a point contact between the container and the truck bed. This linear system has a closed-form solution. After the first solution of the linear system is obtained, the unreasonable, or physically impossible, rotational degree of freedom of the container and the chains with compressive force are eliminated in the follow-up iterative calculations using the same linear system. Unreasonable rotation is detected when the results indicate a rotation of the container into the truck bed. Zero rotational value is assigned to this degree of freedom in the follow-up iterations. For chains under compression, the chain length is replaced with a fictitiously large value because a long chain carries essentially no load. This process usually needs only two or three iterations and can easily be carried out in a spread sheet using such programs as Microsoft Excel or LOTUS 123

  20. Constraining Genome-Scale Models to Represent the Bow Tie Structure of Metabolism for 13C Metabolic Flux Analysis

    Directory of Open Access Journals (Sweden)

    Tyler W. H. Backman

    2018-01-01

    Full Text Available Determination of internal metabolic fluxes is crucial for fundamental and applied biology because they map how carbon and electrons flow through metabolism to enable cell function. 13 C Metabolic Flux Analysis ( 13 C MFA and Two-Scale 13 C Metabolic Flux Analysis (2S- 13 C MFA are two techniques used to determine such fluxes. Both operate on the simplifying approximation that metabolic flux from peripheral metabolism into central “core” carbon metabolism is minimal, and can be omitted when modeling isotopic labeling in core metabolism. The validity of this “two-scale” or “bow tie” approximation is supported both by the ability to accurately model experimental isotopic labeling data, and by experimentally verified metabolic engineering predictions using these methods. However, the boundaries of core metabolism that satisfy this approximation can vary across species, and across cell culture conditions. Here, we present a set of algorithms that (1 systematically calculate flux bounds for any specified “core” of a genome-scale model so as to satisfy the bow tie approximation and (2 automatically identify an updated set of core reactions that can satisfy this approximation more efficiently. First, we leverage linear programming to simultaneously identify the lowest fluxes from peripheral metabolism into core metabolism compatible with the observed growth rate and extracellular metabolite exchange fluxes. Second, we use Simulated Annealing to identify an updated set of core reactions that allow for a minimum of fluxes into core metabolism to satisfy these experimental constraints. Together, these methods accelerate and automate the identification of a biologically reasonable set of core reactions for use with 13 C MFA or 2S- 13 C MFA, as well as provide for a substantially lower set of flux bounds for fluxes into the core as compared with previous methods. We provide an open source Python implementation of these algorithms at https://github.com/JBEI/limitfluxtocore.

  1. Ideological Manipulation in the Form of Official Censorship: Audiovisual Tie-ins of Bestselling Novels in Spain under Franco

    Directory of Open Access Journals (Sweden)

    Cristina Gómez Castro

    2016-02-01

    Full Text Available Whereas technical manipulation in the form of necessary “textual dislocations” (Diaz-Cintas 2012: 284 may be seen as a common object of study in audiovisual translation (AVT, ideological manipulation or a deliberate change from what is said (or shown in the original (ibid still seems to be under developed in the discipline. However, power plays have a lot to say in AVT, as can be illustrated with the repressive forces of censorship at certain times and periods. In the case of Franco’s dictatorship in Spain (1939-1975 and beyond the control of every cultural product which entered the country, both in written or audiovisual form, functioned as an ideological gatekeeper. The last years, however, were marked by a progressive weakening both of the regime and of its censoring mechanism. By then, the massive importation of North American best- selling novels took place, novels which were either commonly filmed afterwards or turned into a TV series, making them famous worldwide. This nurturing from literature of the film industry in the form of tie-ins was a very common synergy at the time, denounced and considered by some as commercial manipulation and social alienation (Carrero Eras 1977. In the present article, the effects of the censoring mechanism on some North American best-selling novels and their film counterparts will be examined, trying to reveal the manoeuvrings at stake and thus contribute to increase the research on the matter and, at the same time see if, the solitary act of reading versus the public broadcasting of a film had a say in the harshness applied to a product derived from the same root.

  2. Elder mistreatment, culture, and help-seeking: a cross-cultural comparison of older Chinese and Korean immigrants.

    Science.gov (United States)

    Lee, Yeon-Shim; Moon, Ailee; Gomez, Cynthia

    2014-01-01

    This study explored and compared the salient sociocultural characteristics that influenced elder mistreatment and help-seeking behaviors among older Chinese and Korean immigrants. Results from qualitative, in-depth focus groups with 30 participants revealed that elder mistreatment is a culturally laden construct, and core values of traditional culture and acculturation are significant contextual factors that profoundly affect the perceptions of elder abuse and receptivity of interventions. Older Korean participants, compared to their Chinese counterparts, demonstrated stronger influence of hierarchy and cultural beliefs in exclusive family ties and gender norms, and were less likely to disclose abuse. Implications for culturally based interventions are also discussed.

  3. Frequency Adaptive Repetitive Control of Grid-Tied Single-Phase PV Inverters

    DEFF Research Database (Denmark)

    Zhou, Keliang; Yang, Yongheng; Blaabjerg, Frede

    2015-01-01

    . This paper thus explores a frequency adaptive repetitive control strategy for grid converters, which employs fractional delay filters in order to adapt to the change of the grid frequency. Case studies with experimental results of a single-phase grid-connected PV inverter system are provided to verify......The internal model principle based Repetitive Control (RC) offers an accurate control strategy for grid-tied power converters to feed sinusoidal current into the grid. However, in the presence of grid frequency variations, the conventional RC fails to produce high quality feeding current...... the proposed controller....

  4. Frequency Adaptive Repetitive Control of Grid-Tied Three-Phase PV Inverters

    DEFF Research Database (Denmark)

    Zhou, Keliang; Yang, Yongheng; Blaabjerg, Frede

    2016-01-01

    Repetitive control offers an accurate current control scheme for grid-tied converters to feed high quality sinusoidal current into the grid. However, with grid frequency being treated as a constant value, conventional repetitive controller fail to produce high quality feeding current...... in the presence of practical time-varying grid frequency. This paper explores frequency adaptive repetitive control strategy for grid-interfaced converters, which employs fractional delay filter to adapt to the change of grid frequency. Case studies with experimental results of three-phase grid......-connected converter systems are provided to verify the proposed controller....

  5. Concept Based Tie-breaking and Maximal Marginal Relevance Retrieval in Microblog Retrieval

    Science.gov (United States)

    2014-11-01

    Concept Based Tie-breaking and Maximal Marginal Relevance Retrieval in Microblog Retrieval Kuang Lu Department of Electrical and Computer Engineering...compute similarity scores: Simi(Q,D)= { 0, i=0 µ ∗ Simi−1(Q,D) + Si , i=1,2,...,k (2) Sim(Q,D)=Simk(Q,D) (3) Given a query Q, a tweet D, and a set of k...signal is denoted as Si (Q,D). Before ith signal is applied, we multi- ply the ranking score for the signals applied earlier ( Si −1(Q,D)) with a big factor µ

  6. A Systematic Method to Synthesize New Transformerless Full-bridge Grid-tied Inverters

    DEFF Research Database (Denmark)

    Wang, Hongliang; Burton, Sarah; Liu, Yan-Fei

    2014-01-01

    Many inverter topologies have been proposed to eliminate the leakage current of transformerless Full Bridge Grid-Tied photovoltaic (PV) inverters. These include implementations such as the H5, H6, and HERIC topologies, among others. In this paper, a new full bridge topology synthesis method, called...... the MN synthesis method, is proposed. The MN method introduces two criteria that can be used to synthesize all of the possible topologies, including the existing topologies as well as new simplified topologies. This method concludes that there are only 15 simplified topologies available. Most simplified...... topologies from MN method have been verified by existing papers and patents....

  7. The modelling of two DOF joints controlled by elastic inner ties

    Directory of Open Access Journals (Sweden)

    Ożóg Dominik

    2017-01-01

    Full Text Available This paper considers the mathematical model of two types of joints that can be used to connect the arms of two robots. The first of them is a simple revolute joint with one degree of freedom and the second is a universal joint with two degrees of freedom. Each of them is controlled using elastic ties that run in the joints and are connected to the inside of the arm joints. This paper describes a study of kinematics, dynamics properties and Extended Denavit-Hartenberg Notation parameters mentioned joints.

  8. Harmonic current prediction by impedance modeling of grid-tied inverters

    DEFF Research Database (Denmark)

    Pereira, Heverton A.; Freijedo, Francisco D.; Silva, M. M.

    2017-01-01

    Grid-tied inverters are the main responsible for the successful integration of photovoltaic (PV) plants in the power grid. Two important challenges are the integration of power plants based-inverters and their contribution to the power system quality. This work analyzes the features of inverter....... In grids with harmonic voltages, impedance models can predict the current distortion for all active power injection scenarios. Furthermore, measurements in a 1.4 MW PV plant connected in a distributed grid are used to validate the simulation based on impedance models during different power injections...

  9. China-USA economic relations: bilateral ties and multilateral economic projects

    Directory of Open Access Journals (Sweden)

    S. M. Troush

    2017-01-01

    Full Text Available The article is devoted to the study of problematic issues of the change of US-China trade is going up notwithstanding the slowdown of Chinese economy. Those US fi rms who placed production in China became more involved into Chinese internal market. Chinese investments into US prevail over the US investments in China. The decisions of the Chinese leadership to set up the new market priorities in the economic development are implemented with obvious diffi culties, but being implemented, could stimulate US-China ties.

  10. Flat tie-line power scheduling control of grid-connected hybrid microgrids

    DEFF Research Database (Denmark)

    Xiao, Zhao xia; Guerrero, Josep M.; Shuang, Jia

    2018-01-01

    In future active distribution networks (ADNs), microgrids (MGs) may have the possibility to control the power dispatched to the ADN by coordinating the output power of their multiple renewable generation units and energy storage units (ESUs). In this way, each MG may support the active distribution....... Also, a method to calculate the tie-line power flow to be exchanged between the MG and the ADN is explored, and a power ramp rate is given between different dispatch intervals. Finally, a simulation model of the hybrid MG is built and tested. Simulation results show that the proposed hierarchical...

  11. Predictive Current Control of Grid-tied Cascade H-bridge Inverter

    OpenAIRE

    Pástor, Marek; Dudrik, Jaroslav

    2013-01-01

    This paper presents a grid-tied cascade H-bridge inverter with predictive current control technique. The proposed 15-level cascade inverter consists of three H-bridge inverters with separated DC sources. At the output of the cascade inverter an L filter is used as a grid filter. The cascade inverter is controlled by the mean of RT-Lab. The predictive current regulator and one-phase synchronous reference frame PLL are designed with help of Rapid Control Prototyping. The proposed control method...

  12. Using strong nonlinearity and high-frequency vibrations to control effective mechanical stiffness

    DEFF Research Database (Denmark)

    Thomsen, Jon Juel

    2008-01-01

    High-frequency excitation (HFE) can be used to change the effective stiffness of an elastic structure, and related quanti-ties such as resonance frequencies, wave speed, buckling loads, and equilibrium states. There are basically two ways to do this: By using parametrical HFE (with or without non...... the method of direct separation of motions with results of a modified multiple scales ap-proach, valid also for strong nonlinearity, the stiffening ef-fect is predicted for a generic 1-dof system, and results are tested against numerical simulation and ((it is planned)) laboratory experiments....

  13. Diabetes is a strong predictor of mortality during tuberculosis treatment

    DEFF Research Database (Denmark)

    Faurholt-Jepsen, Daniel; Range, Nyagosya; Praygod, George Amani

    2013-01-01

    OBJECTIVE: Strong evidence suggests diabetes may be associated with tuberculosis (TB) and could influence TB treatment outcomes. We assessed the role of diabetes on sputum culture conversion and mortality among patients undergoing TB treatment. METHODS: A total of 1250 Tanzanian TB patients were...

  14. Atoms in strong laser fields

    International Nuclear Information System (INIS)

    L'Huillier, A.

    2002-01-01

    When a high-power laser focuses into a gas of atoms, the electromagnetic field becomes of the same magnitude as the Coulomb field which binds a 1s electron in a hydrogen atom. 3 highly non-linear phenomena can happen: 1) ATI (above threshold ionization): electrons initially in the ground state absorb a large number of photons, many more than the minimum number required for ionization; 2) multiple ionization: many electrons can be emitted one at a time, in a sequential process, or simultaneously in a mechanism called direct or non-sequential; and 3) high order harmonic generation (HHG): efficient photon emission in the extreme ultraviolet range, in the form of high-order harmonics of the fundamental laser field can occur. The theoretical problem consists in solving the time dependent Schroedinger equation (TDSE) that describes the interaction of a many-electron atom with a laser field. A number of methods have been proposed to solve this problem in the case of a hydrogen atom or a single-active electron atom in a strong laser field. A large effort is presently being devoted to go beyond the single-active approximation. The understanding of the physics of the interaction between atoms and strong laser fields has been provided by a very simple model called ''simple man's theory''. A unified view of HHG, ATI, and non-sequential ionization, originating from the simple man's model and the strong field approximation, expressed in terms of electrons trajectories or quantum paths is slowly emerging. (A.C.)

  15. Strongly Interacting Light Dark Matter

    Directory of Open Access Journals (Sweden)

    Sebastian Bruggisser, Francesco Riva, Alfredo Urbano

    2017-09-01

    Full Text Available In the presence of approximate global symmetries that forbid relevant interactions, strongly coupled light Dark Matter (DM can appear weakly coupled at small energy and generate a sizable relic abundance. Fundamental principles like unitarity restrict these symmetries to a small class, where the leading interactions are captured by effective operators up to dimension-8. Chiral symmetry, spontaneously broken global symmetries and non-linearly realized supersymmetry are examples of this. Their DM candidates (composite fermions, pseudo Nambu-Goldstone Bosons and Goldstini are interesting targets for LHC missing-energy searches.

  16. Strongly interacting light dark matter

    International Nuclear Information System (INIS)

    Bruggisser, Sebastian; Riva, Francesco; Urbano, Alfredo

    2016-07-01

    In the presence of approximate global symmetries that forbid relevant interactions, strongly coupled light Dark Matter (DM) can appear weakly coupled at small-energy and generate a sizable relic abundance. Fundamental principles like unitarity restrict these symmetries to a small class, where the leading interactions are captured by effective operators up to dimension-8. Chiral symmetry, spontaneously broken global symmetries and non-linearly realized supersymmetry are examples of this. Their DM candidates (composite fermions, pseudo-Nambu-Goldstone Bosons and Goldstini) are interesting targets for LHC missing-energy searches.

  17. Rydberg atoms in strong fields

    International Nuclear Information System (INIS)

    Kleppner, D.; Tsimmerman, M.

    1985-01-01

    Experimental and theoretical achievements in studying Rydberg atoms in external fields are considered. Only static (or quasistatic) fields and ''one-electron'' atoms, i.e. atoms that are well described by one-electron states, are discussed. Mainly behaviour of alkali metal atoms in electric field is considered. The state of theoretical investigations for hydrogen atom in magnetic field is described, but experimental data for atoms of alkali metals are presented as an illustration. Results of the latest experimental and theoretical investigations into the structure of Rydberg atoms in strong fields are presented

  18. Scalar strong interaction hadron theory

    CERN Document Server

    Hoh, Fang Chao

    2015-01-01

    The scalar strong interaction hadron theory, SSI, is a first principles' and nonlocal theory at quantum mechanical level that provides an alternative to low energy QCD and Higgs related part of the standard model. The quark-quark interaction is scalar rather than color-vectorial. A set of equations of motion for mesons and another set for baryons have been constructed. This book provides an account of the present state of a theory supposedly still at its early stage of development. This work will facilitate researchers interested in entering into this field and serve as a basis for possible future development of this theory.

  19. Strong Plate, Weak Slab Dichotomy

    Science.gov (United States)

    Petersen, R. I.; Stegman, D. R.; Tackley, P.

    2015-12-01

    Models of mantle convection on Earth produce styles of convection that are not observed on Earth.Moreover non-Earth-like modes, such as two-sided downwellings, are the de facto mode of convection in such models.To recreate Earth style subduction, i.e. one-sided asymmetric recycling of the lithosphere, proper treatment of the plates and plate interface are required. Previous work has identified several model features that promote subduction. A free surface or pseudo-free surface and a layer of material with a relatively low strength material (weak crust) allow downgoing plates to bend and slide past overriding without creating undue stress at the plate interface. (Crameri, et al. 2012, GRL)A low viscosity mantle wedge, possibly a result of slab dehydration, decouples the plates in the system. (Gerya et al. 2007, Geo)Plates must be composed of material which, in the case of the overriding plate, are is strong enough to resist bending stresses imposed by the subducting plate and yet, as in the case of the subducting plate, be weak enough to bend and subduct when pulled by the already subducted slab. (Petersen et al. 2015, PEPI) Though strong surface plates are required for subduction such plates may present a problem when they encounter the lower mantle.As the subducting slab approaches the higher viscosity, lower mantle stresses are imposed on the tip.Strong slabs transmit this stress to the surface.There the stress field at the plate interface is modified and potentially modifies the style of convection. In addition to modifying the stress at the plate interface, the strength of the slab affects the morphology of the slab at the base of the upper mantle. (Stegman, et al 2010, Tectonophysics)Slabs that maintain a sufficient portion of their strength after being bent require high stresses to unbend or otherwise change their shape.On the other hand slabs that are weakened though the bending process are more amenable to changes in morphology. We present the results of

  20. Effect of historical earthquakes on pre-stressed anchor tie back diaphragm wall and on near-by building

    Directory of Open Access Journals (Sweden)

    Kamal Mohamed Hafez Ismail Ibrahim

    2013-04-01

    Full Text Available Pre-stressed tie back anchored diaphragm walls are considered one of the safest lateral supports which help in overall stability when there is a significant difference in land level between back and front of these walls. Permanent lateral supports to these walls are frequently represented by supporting it laterally with foundation and floor slabs of the building. In this paper a special study of one raw anchor diaphragm wall subjected to different earthquake dynamic loads will be presented. The wall retains an excavation of 9.5 m and supports laterally a near-by 5 floor building. Five historical strong motions with different fundamental frequencies are subjected on the wall. The wall displacement, straining actions, anchor extreme force and the influence of variation of anchor stiffness are calculated using a dynamic Plaxis finite element program. The soil is considered as elasto-plastic material and represented using Mohr–Coulomb criteria, the wall and the anchor are considered to behave elastically. Prescribed displacement at the lower bottom boundary represents the earthquake motion. Far left and right absorbent boundaries are assumed to prevent dynamic wave reflection. Four static phases representing construction procedure and one dynamic loading phase are considered. It is found that the straining actions of different historical earthquakes match in shape with each other, the only change is in the amplitude which is affected by earthquake fundamental frequency and its intensity. The maximum dynamic lateral displacement of the wall is at its free top. The near-by building shows a differential settlement towards the wall which causes a change in the sign and amplitude of the straining actions. Increasing the stiffness of anchor was also studied and it was found that it reduces too much the maximum dynamic top wall lateral displacement.

  1. An anthropology of learning on nested frictions in cultural ecologies

    CERN Document Server

    Hasse, Cathrine

    2015-01-01

    This book has one explicit purpose: to present a new theory of cultural learning in organisations which combines practice-based learning with cultural models - a cognitive anthropological schema theory of taken-for-granted connections - tied to the everyday meaningful use of artefacts. The understanding of culture as emerging in a process of learning open up for new understandings, which is useful for researchers, practitioners and students interested in dynamic studies of culture and cultural studies of organisations. The new approach goes beyond culture as a static, essentialist entity and open for our possibility to learn in organisations across national cultures, across ethnicity and across the apparently insurmountable local educational differences which makes it difficult for people to communicate working together in an increasingly globalized world. The empirical examples are mainly drawn from organisations of education and science which are melting-pots of cultural encounters.

  2. EDITORIAL: Strongly correlated electron systems Strongly correlated electron systems

    Science.gov (United States)

    Ronning, Filip; Batista, Cristian

    2011-03-01

    Strongly correlated electrons is an exciting and diverse field in condensed matter physics. This special issue aims to capture some of that excitement and recent developments in the field. Given that this issue was inspired by the 2010 International Conference on Strongly Correlated Electron Systems (SCES 2010), we briefly give some history in order to place this issue in context. The 2010 International Conference on Strongly Correlated Electron Systems was held in Santa Fe, New Mexico, a reunion of sorts from the 1989 International Conference on the Physics of Highly Correlated Electron Systems that also convened in Santa Fe. SCES 2010—co-chaired by John Sarrao and Joe Thompson—followed the tradition of earlier conferences, in this century, hosted by Buzios (2008), Houston (2007), Vienna (2005), Karlsruhe (2004), Krakow (2002) and Ann Arbor (2001). Every three years since 1997, SCES has joined the International Conference on Magnetism (ICM), held in Recife (2000), Rome (2003), Kyoto (2006) and Karlsruhe (2009). Like its predecessors, SCES 2010 topics included strongly correlated f- and d-electron systems, heavy-fermion behaviors, quantum-phase transitions, non-Fermi liquid phenomena, unconventional superconductivity, and emergent states that arise from electronic correlations. Recent developments from studies of quantum magnetism and cold atoms complemented the traditional subjects and were included in SCES 2010. 2010 celebrated the 400th anniversary of Santa Fe as well as the birth of astronomy. So what's the connection to SCES? The Dutch invention of the first practical telescope and its use by Galileo in 1610 and subsequent years overturned dogma that the sun revolved about the earth. This revolutionary, and at the time heretical, conclusion required innovative combinations of new instrumentation, observation and mathematics. These same combinations are just as important 400 years later and are the foundation of scientific discoveries that were discussed

  3. Understanding the experiences of mothers who are breastfeeding an infant with tongue-tie: a phenomenological study.

    Science.gov (United States)

    Edmunds, Janet Elizabeth; Fulbrook, Paul; Miles, Sandra

    2013-05-01

    Tongue-tie or ankyloglossia is a congenital condition that negatively affects breastfeeding. The thickened, tightened, or shortened frenulum affects the infant's ability to suck and frequently results in sore and painful nipples. Although several studies have investigated outcomes associated with treatment of tongue-tie, none have investigated mothers' experiences of breastfeeding an infant with tongue-tie. This study aimed to understand the breastfeeding experiences of women whose infants have tongue-tie. A hermeneutic phenomenological design was employed. Data were collected using focused interviews and, following transcription, were analyzed in the phenomenological tradition. Ten women who presented at a breastfeeding clinic with feeding problems, and were diagnosed with tongue-tie, were interviewed on 2 occasions. The analysis revealed a common story of tension between the mothers' expectations and the breastfeeding challenges they faced. Their journey was characterized by 6 distinct phases described in the following themes: Expectations; Something is wrong; Questioning, seeking advice, no real answers; Symptoms and perseverance; Approaching the wall-it's all too much; and finally, Relief. The women in this study described a somewhat harrowing journey, which was at odds with the natural experience they had anticipated. They encountered health professionals who were found to have limited knowledge of tongue-tie and its potential effect on breastfeeding and were unable to provide appropriate advice concerning their breastfeeding difficulties. However, following treatment with frenotomy, their breastfeeding experience improved dramatically. The reported incidence of tongue-tie is significant, and early identification and prompt and effective management would contribute to improved breastfeeding.

  4. Constructing Current Singularity in a 3D Line-tied Plasma

    Science.gov (United States)

    Zhou, Yao; Huang, Yi-Min; Qin, Hong; Bhattacharjee, A.

    2018-01-01

    We revisit Parker’s conjecture of current singularity formation in 3D line-tied plasmas using a recently developed numerical method, variational integration for ideal magnetohydrodynamics in Lagrangian labeling. With the frozen-in equation built-in, the method is free of artificial reconnection, and hence it is arguably an optimal tool for studying current singularity formation. Using this method, the formation of current singularity has previously been confirmed in the Hahm–Kulsrud–Taylor problem in 2D. In this paper, we extend this problem to 3D line-tied geometry. The linear solution, which is singular in 2D, is found to be smooth for arbitrary system length. However, with finite amplitude, the linear solution can become pathological when the system is sufficiently long. The nonlinear solutions turn out to be smooth for short systems. Nonetheless, the scaling of peak current density versus system length suggests that the nonlinear solution may become singular at finite length. With the results in hand, we can neither confirm nor rule out this possibility conclusively, since we cannot obtain solutions with system length near the extrapolated critical value.

  5. Review of tongue-tie release at a tertiary maternity hospital.

    Science.gov (United States)

    Amir, Lisa Helen; James, Jennifer Patricia; Beatty, Joanne

    2005-01-01

    To review the first 12 months of assessment and release of lingual frenulum (frenotomy) at a breast-feeding clinic in a tertiary maternity hospital (August 2002 to end of July 2003) and to report on the breast-feeding outcomes and parental satisfaction. A structured telephone interview was conducted with the mother at least 3 months after the assessment. Data were collected about the presenting problem and the effect of release of the tongue-tie (if performed). Parents were also asked about their satisfaction with the procedure and of problems following the release. Sixty-six babies were assessed in 12 months. If infants were assessed as: (i) having impaired lingual function (using the Hazelbaker assessment tool for lingual frenulum function); (ii) the frenulum visualized to be a thin membrane; and (iii) the parent(s) gave informed consent, the frenulum was released. Initial and follow-up data are available on 46 infants. Infants had a mean age of 18 days (range 3-98), 63% were male infants and most had difficulties with attachment to the breast. Frenotomy was performed on 35 infants and breast-feeding improved in 83%. Parents reported high levels of satisfaction with the frenotomy procedure and no complications were reported. Frenotomy is a safe and easy procedure. Infants with a significant tongue-tie that is interfering with breast-feeding have shown an improvement with breast-feeding following frenotomy.

  6. Accreditation of midwife lactation consultants to perform infant tongue-tie release.

    Science.gov (United States)

    Amir, Lisa H; James, Jennifer P; Kelso, Georgie; Moorhead, Anita M

    2011-12-01

    Infants with a tongue-tie or ankyloglossia have a short lingual frenulum, which can lead to problems with breastfeeding: attachment difficulties, nipple pain and damage, poor weight gain and eventually a reduction in milk supply. Trained clinicians can release the frenulum (frenotomy) in infants having difficulty with breastfeeding. Although traditionally performed by medical practitioners, we argue that this simple procedure is within the scope of practice of other clinicians. This paper outlines the process of setting up and maintaining credentialing for midwife lactation consultants (International Board Certified Lactation Consultants (IBCLCs)) to assess infant tongue-ties and perform frenotomy when appropriate at a tertiary maternity hospital. Since 2005, 11 midwives/IBCLCs have been credentialed to perform frenotomies at The Breastfeeding Education and Support Services at The Royal Women's Hospital in Melbourne, Australia. We believe that nurses/midwives/lactation consultants working in other settings could be trained to perform frenotomies, thus enabling faster resolution of breastfeeding problems. © 2011 Blackwell Publishing Asia Pty Ltd.

  7. Dynamic Equivalent Modeling of a Grid-Tied Microgrid Based on Characteristic Model and Measurement Data

    Directory of Open Access Journals (Sweden)

    Changchun Cai

    2017-11-01

    Full Text Available Microgrids can significantly improve the utilization of distributed generation (DG and the reliability of the power supply. However, in the grid-tied operational mode, the interaction between the microgrid and the distribution network cannot be ignored. The paper proposes an equivalent modeling method for the microgrid under grid-tied mode based on a characteristic model. It can simplify the microgrid model in the numerical simulation of the distribution network. The proposed equivalent model can present the dynamic response of a microgrid but not miss any of its primary characteristics. The characteristic model is represented by a low-order time-varying differential equation with the same characteristics of the original microgrid system. During the modeling process, the voltage and the power exchanged between the microgrid and distribution network are collected as the training data for the identification of model parameters. A recursive damped least squares algorithm (RDLS is used for the parameter identification. A microgrid system containing different DGs is built to test the proposed modeling method in DIgSILENT, and the results show that the proposed dynamic equivalent modeling method is effective and the characteristic model can present the dynamic behaviors of the detailed model of a microgrid.

  8. Strut and tie modeling for RC short beams with corroded stirrups

    Directory of Open Access Journals (Sweden)

    Ahmed K. El-Sayed

    Full Text Available Corrosion of steel reinforcement is one of the major problems that shorten the service life of reinforced concrete (RC structures. Steel stirrups, due to their location as an outer reinforcement, are more susceptible to corrosion problems and damage. However, there is limited research work in the literature on the effects of stirrup corrosion on the shear strength of RC beams. This paper attempts to evaluate analytically the residual shear strength of RC short beams with corrosion-damaged stirrups. The shear strength of short or deep beams are generally determined using the strut and tie model. The corrosion effects were implemented in the model to make it capable of predicting the residual shear capacity of RC beams with corroded stirrups. The effect of corrosion is implemented considering the reduction in geometry of the concrete cross section due to spalling and reduction in effective compressive strength of concrete due to corrosion cracks. The proposed strut and tie model which accounts for the corrosion effects was verified using the experimental data available in the literature, and good agreement was found.

  9. Use of a Barbed Suture Tie-Over Technique for Skin Graft Dressings: A Case Series

    Directory of Open Access Journals (Sweden)

    Kenneth M Joyce

    2015-05-01

    Full Text Available BackgroundA tie-over dressing is the accepted method to secure skin grafts in order to prevent haematoma or seroma formation. We describe the novel application of a barbed suture tie-over for skin graft dressing. The barbs act as anchors in the skin so constant tensioning of the suture is not required.MethodsFrom January 2014 to August 2014 we used the technique in 30 patients with skin defects requiring split-thickness or full-thickness grafts. Patient demographics, clinicopathological details and graft outcome were collected prospectively.ResultsThe majority of cases were carried out for split-thickness skin grafts (n=19 used on the lower limb (n=20. The results of this novel technique were excellent with complete (100% graft take in all patients.ConclusionsOur results demonstrate the clinical application of a barbed device for securing skin grafts with excellent results. We find the technique quick to perform and the barbed device easy to handle, which can be applied without the need for an assistant.

  10. A composite passive damping method of the LLCL-filter based grid-tied inverter

    DEFF Research Database (Denmark)

    Wu, Weimin; Huang, Min; Sun, Yunjie

    2012-01-01

    This paper investigates the maximum and the minimum gain of the proportional resonant based grid current controller for a grid-tied inverter with a passive damped high-order power filter. It is found that the choice of the controller gain is limited to the local maximum amplitude determined by Q......-factor around the characteristic frequency of the filter and grid impedance. To obtain the Q-factor of a high-order system, an equivalent circuit analysis method is proposed and illustrated through several classical passive damped LCL- and LLCL-filters. It is shown that both the RC parallel damper...... that is in parallel with the capacitor of the LCL-filter or with the Lf-Cf resonant circuit of the LLCL-filter, and the RL series damper in series with the grid-side inductor have their own application limits. Thus, a composite passive damped LLCL-filter for the grid-tied inverter is proposed, which can effectively...

  11. Social organization and social ties: their effects on sexual harassment victimization in the workplace.

    Science.gov (United States)

    Snyder, Jamie A; Scherer, Heidi L; Fisher, Bonnie S

    2012-01-01

    Despite work organizations' attempts to reduce sexual harassment, it continues to be a salient issue for employers across all occupations. Extending social disorganization theory to the work environment, this study examines the relationship between workplace organization, social ties, and sexual harassment victimization. Survey responses to the 2002 and 2006 Quality of Working Life module from the General Social Survey by a sample of 3,530 adult men and women employees in the United States were used. Logistic regression models were estimated for men and women separately to estimate the effect of workplace characteristics on the risk of sexual harassment victimization. Employees who reported poor workplace relations between management and employees and lower coworker social ties were more likely to experience sexual harassment in their work environments. Specific workplace characteristics such as low productivity, poor time management, and inadequate administrative support were significantly related to increased sexual harassment risk. No significant gender differences were found across models suggesting that the predictors of sexual harassment are similar for men and women. This study demonstrates that workplace characteristics are related to sexual harassment risk in the workplace. Suggestions for sexual harassment prevention, including management and organizational strategies, are discussed.

  12. Maximizing Power Output of a Partially Shaded Total-Cross-Tied Photovoltaic array

    Directory of Open Access Journals (Sweden)

    Neha Saurabh Shah

    2017-01-01

    Full Text Available Non-uniform conditions on the modules of the PV array, especially, partial shading reduces the output of the PV array to a large extent. The shaded module in a string limits the current of the entire string and hence, the output power of the string.  The output power under such conditions is reported to be higher for total-cross-tied (TCT configuration. This paper describes two different approaches, one based on current compensation (current equalization and another based on voltage equalization, to extract higher power from the partially shaded total-cross-tied photovoltaic array. The TCT configuration is considered to minimize the number of converters, sensors, cost and complexity involved. The additional converters in the two distinct approaches evaluated here operate only when the partial shading occurs and are controlled to minimize the current and voltage miss-matches. The analysis and the control algorithm are presented. Simulation results obtained in MATLAB/Simulink are included to demonstrate the effectiveness of both methods and the relative merits and demerits of these approaches are highlighted.

  13. Child first language and adult second language are both tied to general-purpose learning systems.

    Science.gov (United States)

    Hamrick, Phillip; Lum, Jarrad A G; Ullman, Michael T

    2018-02-13

    Do the mechanisms underlying language in fact serve general-purpose functions that preexist this uniquely human capacity? To address this contentious and empirically challenging issue, we systematically tested the predictions of a well-studied neurocognitive theory of language motivated by evolutionary principles. Multiple metaanalyses were performed to examine predicted links between language and two general-purpose learning systems, declarative and procedural memory. The results tied lexical abilities to learning only in declarative memory, while grammar was linked to learning in both systems in both child first language and adult second language, in specific ways. In second language learners, grammar was associated with only declarative memory at lower language experience, but with only procedural memory at higher experience. The findings yielded large effect sizes and held consistently across languages, language families, linguistic structures, and tasks, underscoring their reliability and validity. The results, which met the predicted pattern, provide comprehensive evidence that language is tied to general-purpose systems both in children acquiring their native language and adults learning an additional language. Crucially, if language learning relies on these systems, then our extensive knowledge of the systems from animal and human studies may also apply to this domain, leading to predictions that might be unwarranted in the more circumscribed study of language. Thus, by demonstrating a role for these systems in language, the findings simultaneously lay a foundation for potentially important advances in the study of this critical domain.

  14. The Relation Between the Raw Milk and Barn Hygiene in Tied Dairy Cows

    Directory of Open Access Journals (Sweden)

    Silvana Popescu

    2017-11-01

    Full Text Available The aim of this study was to investigate the relation between the hygiene of the barns and of the raw milk in tie stall dairy barns. Ten dairy farms with tie stalls from Transylvaniawere included in the study. The barn hygiene was evaluated based on the cows’ body hygiene. 820 dairy cows were assessed. The hygiene of the raw milk was investigated by the determination of the total bacteria count, in 359 individually milked samples. The data were analysed using the SPSS statistical software. The highest percentage of the 3 and 4 hygiene scores was recorded in the udder area, followed by the upper leg and flank and the lower leg. The total bacterial counts varied greatly in the milk from the investigated farms, from 100 CFU/ml to 307 x 103 CFU/ml. Four of the ten assessed barns were considered dirty and in five barns the total bacterial count exceeded the admitted limit. The barn hygiene correlated significantly with the hygiene of the raw milk (r = 0.82, P = 0.004. The results of the study attested that the hygiene quality of raw milk depends largely on the cleanliness of the barn where the animals are housed.

  15. Market Assessment of Residential Grid-Tied PV Systems in Colorado

    Energy Technology Data Exchange (ETDEWEB)

    Farhar, B.; Coburn, T.

    2000-09-29

    This report presents research done in response to a decision by the Colorado Governor's Office of Energy Conservation and Management (OEC) and Colorado utility companies to consider making residential grid-tied photovoltaic (PV) systems available in Colorado. The idea was to locate homeowners willing to pay the costs of grid-tied PV (GPV) systems without batteries-$8,000 or $12,000 for a 2- or 3-kilowatt (kW) system, respectively, in 1996. These costs represented two-thirds of the actual installed cost of $6 per watt at that time and assumed the remainder would be subsidized. The National Renewable Energy Laboratory (NREL) and OEC partnered to conduct a market assessment for GPV technology in Colorado. The study encompassed both qualitative and quantitative phases. The market assessment concluded that a market for residential GPV systems exists in Colorado today. That market is substantial enough for companies to successfully market PV systems to Colorado homeowners. These homeo wners appear ready to learn more, inform themselves, and actively purchase GPV systems. The present situation is highly advantageous to Colorado's institutions-primarily its state government and its utility companies, and also its homebuilders-if they are ready to move forward on GPV technology.

  16. Macro-mechanical strut and tie model for analysis of fibrous high-strength concrete corbels

    Directory of Open Access Journals (Sweden)

    E.S. Khalifa

    2012-12-01

    Full Text Available Reinforced concrete (RC corbels becoming a frequent attribute in the building construction with the increasing use of pre-cast high-strength concrete (HSC. The use of fibrous high-strength concrete (FHSC, increases corbel ductility and thus defines the mode of failure of the corbels, depending on the fiber parameters. In this paper a macro-mechanical strut and tie model is proposed for analysis of fibrous high-strength concrete corbels. In this model the fibers can be used as a replacement of horizontal stirrups, due to increasing of shear friction of (FHSC. The analytical macro-mechanical model takes into consideration the effect of fiber volume, fiber length, and fiber diameter, random distribution of fibers, fiber HSC interface and shear span-to-depth ratio, respectively. This model is compared with available experimental results found in literature and a good agreement is obtained. The parametric study is performed to examine for different parameters affecting the analysis of (FHSC corbels using the proposed macro-mechanical strut and tie model.

  17. A Market Assessment of Residential Grid-Tied PV Systems in Colorado: Executive Summary

    Energy Technology Data Exchange (ETDEWEB)

    Farhar, B.; Coburn, T.

    2000-09-13

    This is the Executive Summary of a report that presents research done in response to a decision by the Colorado Governor's Office of Energy Conservation and Management (OEC) and Colorado utility companies to consider making residential grid-tied photovoltaic (PV) systems available in Colorado. The idea was to locate homeowners willing to pay the costs of grid-tied PV (GPV) systems without batteries--$8,000 or $12,000 for a 2- or 3-kilowatt (kW) system, respectively, in 1996. These costs represented two-thirds of the actual installed cost of $6 per watt at that time and assumed the remainder would be subsidized. The National Renewable Energy Laboratory (NREL) and OEC partnered to conduct a market assessment for GPV technology in Colorado. The study encompassed both qualitative and quantitative phases. The market assessment concluded that a market for residential GPV systems exists in Colorado today. That market is substantial enough for companies to successfully market PV systems to Colorado homeowners. These homeowners appear ready to learn more, inform themselves, and actively purchase GPV systems. The present situation is highly advantageous to Colorado's institutions--primarily its state government and its utility companies, and also its homebuilders--if they are ready to move forward on GPV technology.

  18. Phase diagram and tie-line determination for the ternary mixture DOPC/eSM/cholesterol.

    Science.gov (United States)

    Bezlyepkina, N; Gracià, R S; Shchelokovskyy, P; Lipowsky, R; Dimova, R

    2013-04-02

    We propose a novel, to our knowledge, method for the determination of tie lines in a phase diagram of ternary lipid mixtures. The method was applied to a system consisting of dioleoylphosphatidylcholine (DOPC), egg sphingomyelin (eSM), and cholesterol (Chol). The approach is based on electrofusion of single- or two-component homogeneous giant vesicles in the fluid phase and analyses of the domain areas of the fused vesicle. The electrofusion approach enables us to create three-component vesicles with precisely controlled composition, in contrast to conventional methods for giant vesicle formation. The tie lines determined in the two-liquid-phase coexistence region are found to be not parallel, suggesting that the dominant mechanism of lipid phase separation in this region changes with the membrane composition. We provide a phase diagram of the DOPC/eSM/Chol mixture and predict the location of the critical point. Finally, we evaluate the Gibbs free energy of transfer of individual lipid components from one phase to the other. Copyright © 2013 Biophysical Society. Published by Elsevier Inc. All rights reserved.

  19. Cross-border ties as a source of risk and resilience: Do cross-border ties moderate the relationship between migration-related stress and psychological distress among Latino migrants in the United States?

    Science.gov (United States)

    Torres, Jacqueline M.; Alcántara, Carmela; Rudolph, Kara E.; Viruell-Fuentes, Edna A.

    2017-01-01

    Few studies have examined the associations between health and the cross-border ties that migrants maintain with their family members in communities of origin. We draw on theory related to social ties, ethnic identity, and mental health to examine cross-border ties as potential moderators of the association between migration-related stress and psychological distress among Latino migrants. Using data from the National Latino and Asian American Survey, we find that remittance sending is associated with significantly lower levels of psychological distress for Cuban migrants, and difficulty visiting home is associated with significantly greater psychological distress for Puerto Rican migrants. There were significant associations between migration-related stressors and psychological distress, although these associations fell to non-significance after accounting for multiple testing. We found little evidence that cross-border ties either buffer or exacerbate the association between migration-related stressors and psychological distress. We consider the findings within the current political and historical context of cross-border ties and separation. PMID:27803264

  20. Physics of Strongly Coupled Plasma

    Energy Technology Data Exchange (ETDEWEB)

    Kraeft, Wolf-Dietrich [Universitat Rostock (Germany)

    2007-07-15

    Strongly coupled plasmas (or non-ideal plasmas) are multi-component charged many-particle systems, in which the mean value of the potential energy of the system is of the same order as or even higher than the mean value of the kinetic energy. The constituents are electrons, ions, atoms and molecules. Dusty (or complex) plasmas contain still mesoscopic (multiply charged) particles. In such systems, the effects of strong coupling (non-ideality) lead to considerable deviations of physical properties from the corresponding properties of ideal plasmas, i.e., of plasmas in which the mean kinetic energy is essentially larger than the mean potential energy. For instance, bound state energies become density dependent and vanish at higher densities (Mott effect) due to the interaction of the pair with the surrounding particles. Non-ideal plasmas are of interest both for general scientific reasons (including, for example, astrophysical questions), and for technical applications such as inertially confined fusion. In spite of great efforts both experimentally and theoretically, satisfactory information on the physical properties of strongly coupled plasmas is not at hand for any temperature and density. For example, the theoretical description of non-ideal plasmas is possible only at low densities/high temperatures and at extremely high densities (high degeneracy). For intermediate degeneracy, however, numerical experiments have to fill the gap. Experiments are difficult in the region of 'warm dense matter'. The monograph tries to present the state of the art concerning both theoretical and experimental attempts. It mainly includes results of the work performed in famous Russian laboratories in recent decades. After outlining basic concepts (chapter 1), the generation of plasmas is considered (chapter 2, chapter 3). Questions of partial (chapter 4) and full ionization (chapter 5) are discussed including Mott transition and Wigner crystallization. Electrical and

  1. Strongly coupled dust coulomb clusters

    International Nuclear Information System (INIS)

    Juan Wentau; Lai Yingju; Chen Mingheng; I Lin

    1999-01-01

    The structures and motions of quasi-2-dimensional strongly coupled dust Coulomb clusters with particle number N from few to hundreds in a cylindrical rf plasma trap are studied and compared with the results from the molecular dynamic simulation using more ideal models. Shell structures with periodic packing in different shells and intershell rotational motion dominated excitations are observed at small N. As N increases, the boundary has less effect, the system recovers to the triangular lattice with isotropic vortex type cooperative excitations similar to an infinite N system except the outer shell region. The above generic behaviors are mainly determined by the system symmetry and agree with the simulation results. The detailed interaction form causes minor effect such as the fine structure of packing

  2. Probability densities in strong turbulence

    Science.gov (United States)

    Yakhot, Victor

    2006-03-01

    In this work we, using Mellin’s transform combined with the Gaussian large-scale boundary condition, calculate probability densities (PDFs) of velocity increments P(δu,r), velocity derivatives P(u,r) and the PDF of the fluctuating dissipation scales Q(η,Re), where Re is the large-scale Reynolds number. The resulting expressions strongly deviate from the Log-normal PDF P(δu,r) often quoted in the literature. It is shown that the probability density of the small-scale velocity fluctuations includes information about the large (integral) scale dynamics which is responsible for the deviation of P(δu,r) from P(δu,r). An expression for the function D(h) of the multifractal theory, free from spurious logarithms recently discussed in [U. Frisch, M. Martins Afonso, A. Mazzino, V. Yakhot, J. Fluid Mech. 542 (2005) 97] is also obtained.

  3. Reducing the Cultural Divide among U.S. and Mexican Students through Application of the Contact Hypothesis

    Science.gov (United States)

    Mickus, Maureen; Bowen, Denise

    2017-01-01

    Mexico and the U.S. are closely associated by commerce, culture and family ties. Despite the geographical proximity and the long-standing socio-political history between the two countries, there is limited understanding of cultural differences and similarities. A unique study abroad programme for U.S. and Mexican students was developed based on…

  4. Urine culture

    Science.gov (United States)

    Culture and sensitivity - urine ... when urinating. You also may have a urine culture after you have been treated for an infection. ... when bacteria or yeast are found in the culture. This likely means that you have a urinary ...

  5. Assessment of Safety Culture

    International Nuclear Information System (INIS)

    Bilic Zabric, T.; Kavsek, D.

    2006-01-01

    A strong safety culture leads to more effective conduct of work and a sense of accountability among managers and employees, who should be given the opportunity to expand skills by training. The resources expended would thus result in tangible improvements in working practices and skills, which encourage further improvement of safety culture. In promoting an improved safety culture, NEK has emphasized both national and organizational culture with an appropriate balance of behavioural sciences and quality management systems approaches. In recent years there has been particular emphasis put on an increasing awareness of the contribution that human behavioural sciences can make to develop good safety practices. The purpose of an assessment of safety culture is to increase the awareness of the present culture, to serve as a basis for improvement and to keep track of the effects of change or improvement over a longer period of time. There is, however, no single approach that is suitable for all purposes and which can measure, simultaneously, all the intangible aspects of safety culture, i.e. the norms, values, beliefs, attitudes or the behaviours reflecting the culture. Various methods have their strengths and weaknesses. To prevent significant performance problems, self-assessment is used. Self-assessment is the process of identifying opportunities for improvement actively or, in some cases, weaknesses that could cause more serious errors or events. Self-assessments are an important input to the corrective action programme. NEK has developed questionnaires for safety culture self-assessment to obtain information that is representative of the whole organization. Questionnaires ensure a greater degree of anonymity, and create a less stressful situation for the respondent. Answers to questions represent the more apparent and conscious values and attitudes of the respondent. NEK proactively co-operates with WANO, INPO, IAEA in the areas of Safety Culture and Human

  6. Preuve judiciaire et culture française Judiciary evidence and French culture

    Directory of Open Access Journals (Sweden)

    Emmanuel Jeuland

    2009-07-01

    Full Text Available Des tentatives d’unification de la procédure ont actuellement lieu soit à l’échelle régionale (notamment européenne soit à l’échelle mondiale (notamment les Principes et règles de procédure civile transnationale d’Unidroit. Or il apparaît que le principal obstacle à ces rapprochements est d’ordre culturel et que les difficultés concernent particulièrement le droit de la preuve (les mécanismes de discovery ou de cross-examination restant pour partie inconnus en France. Ainsi l’accès à la vérité judiciaire, comme l’avait vu Pascal, varie grandement d’un pays à l’autre. Il s’agit plus précisément ici de déterminer les relations entre le droit de la preuve et la culture française. Après avoir tenté de dégager les grands traits de la culture française (tradition, égalité etc., une confrontation a pu être menée avec les principales règles du droit de la preuve que ce soit au plan pénal ou civil. Mais il est aussi apparu que la culture était faite d’une certaine manière de tisser les liens de droits (filiation, mariage, contrats, nationalité etc. et que les règles de preuve permettaient de recoudre ces attaches ou de créer des liens de droit réparateur, si bien qu’en définitive, on comprend bien pourquoi une unification mondiale est particulièrement difficile voire impossible sans mettre à mal une partie de la culture.Attempts to unify procedure are presently made either at the regional (particularly European level or at the world level (especially the Unidroit Principles and rules of the transnational civil procedure. However the main obstacle to these connections seems to be at the cultural level while specific difficulties concern the law of evidence (the discovery or cross-examination mechanisms being partly unknown in France. Therefore we can say after Pascal that access to judiciary truth strongly varies from one country to another. More precisely, the author wants here to

  7. Safeguards Culture

    Energy Technology Data Exchange (ETDEWEB)

    Frazar, Sarah L.; Mladineo, Stephen V.

    2012-07-01

    The concepts of nuclear safety and security culture are well established; however, a common understanding of safeguards culture is not internationally recognized. Supported by the National Nuclear Security Administration, the authors prepared this report, an analysis of the concept of safeguards culture, and gauged its value to the safeguards community. The authors explored distinctions between safeguards culture, safeguards compliance, and safeguards performance, and evaluated synergies and differences between safeguards culture and safety/security culture. The report concludes with suggested next steps.

  8. The weight of networks: the role of social ties and ethnic media in mitigating obesity and hypertension among Latinas.

    Science.gov (United States)

    Walter, Nathan; Robbins, Chris; Murphy, Sheila T; Ball-Rokeach, Sandra J

    2017-09-01

    Latinos have a disproportionately high risk for obesity and hypertension. The current study analyzes survey data from Latin American women to detect differences in rates of obesity and hypertension based on their number of health-related social ties. Additionally, it proposes individuals' health-related media preference (ethnic/ mainstream) as a potential moderator. The dataset includes 364 Latinas (21-50 years old) from the greater Los Angeles metropolitan area, who responded to a series of sociodemographic, physiological, health-related, and media-related questions. Controlling for various sociodemographic and health variables, each additional health-related tie in a Latina's social network significantly decreased her likelihood of being obese OR = .79, p = .041, 95% CI [.66, .95], but did not affect hypertension. Further, the analysis revealed a significant interaction between media preference and health-related social ties, such that exposure to ethnic media tended to compensate for the absence of social ties for the likelihood of obesity OR = .75, p = .041, 95% CI [.52, .97], as well as hypertension OR = .79, p = .045, 95% CI [.55, .98]. In concurrence with the literature, increases in health-related ties reduced the likelihood of obesity in this population. Moreover, ethnic media preference may play an important role in mitigating the likelihood of obesity and hypertension among Latinas.

  9. Angiopoietin-2 and soluble Tie-2 receptor plasma levels in children with obstructive sleep apnea and obesity.

    Science.gov (United States)

    Gozal, David; Khalyfa, Abdelnaby; Qiao, Zhuanghong; Smith, Dale L; Philby, Mona F; Koren, Dorit; Kheirandish-Gozal, Leila

    2017-06-01

    Obstructive sleep apnea (OSA) is a prevalent condition, especially in children with obesity, and is associated with increased risk for metabolic syndrome (MetS). Angiopoietins have been identified as potential biomarkers of endothelial dysfunction and MetS. In adults, angiopoietin-2 (Ang-2) and its soluble receptor (sTie-2) are associated with diabetes, hypertension, and obesity and could be increased in children with OSA and obesity, particularly those with evidence of cardiometabolic alterations. One hundred twenty-six children (7.4 ± 2.0 years) were consecutively recruited and underwent overnight polysomnography, as well as endothelial function and BMI z score assessments and a fasting blood draw the morning after the sleep study. In addition to lipid profile, glucose and insulin levels, and homeostatic model assessment of insulin resistance (HOMA-IR), Ang-2 and sTie-2 concentrations were determined. Children with obesity and OSA had significantly elevated plasma Ang-2 and sTie-2 levels compared to corresponding controls with and without obesity. Furthermore, endothelial function (Tmax) and HOMA-IR were linearly and independently associated with Ang-2 and sTie-2 levels. In a small subset of children (n = 14), treatment of OSA by adenotonsillectomy resulted in reductions of Ang-2 and sTie-2 (P obesity, particularly when endothelial dysfunction or insulin resistance is detectable, and appear to decrease upon OSA treatment. © 2017 The Obesity Society.

  10. More Stable Ties or Better Structure? An Examination of the Impact of Co-author Network on Team Knowledge Creation

    Directory of Open Access Journals (Sweden)

    Mingze Li

    2017-09-01

    Full Text Available This study aims to explore the influence of co-author network on team knowledge creation. Integrating the two traditional perspectives of network relationship and network structure, we examine the direct and interactive effects of tie stability and structural holes on team knowledge creation. Tracking scientific articles published by 111 scholars in the research field of human resource management from the top 8 American universities, we analyze scholars’ scientific co-author networks. The result indicates that tie stability changes the teams’ information processing modes and, when graphed, results in an inverted U-shape relationship between tie stability and team knowledge creation. Moreover, structural holes in co-author network are proved to be harmful to team knowledge sharing and diffusion, thereby impeding team knowledge creation. Also, tie stability and structural hole interactively influence team knowledge creation. When the number of structural hole is low in the co-author network, the graphical representation of the relationship between tie stability and team knowledge creation tends to be a more distinct U-shape.

  11. Organizational Culture

    Directory of Open Access Journals (Sweden)

    Adrian HUDREA

    2006-02-01

    Full Text Available Cultural orientations of an organization can be its greatest strength, providing the basis for problem solving, cooperation, and communication. Culture, however, can also inhibit needed changes. Cultural changes typically happen slowly – but without cultural change, many other organizational changes are doomed to fail. The dominant culture of an organization is a major contributor to its success. But, of course, no organizational culture is purely one type or another. And the existence of secondary cultures can provide the basis for change. Therefore, organizations need to understand the cultural environments and values.

  12. Experimentally induced innovations lead to persistent culture via conformity in wild birds

    Science.gov (United States)

    Aplin, L.M.; Farine, D.R.; Morand-Ferron, J.; Cockburn, A.; Thornton, A.; Sheldon, B.C.

    2014-01-01

    In human societies, cultural norms arise when behaviours are transmitted with high-fidelity social learning through social networks1. However a paucity of experimental studies has meant that there is no comparable understanding of the process by which socially transmitted behaviours may spread and persist in animal populations2,3. Here, we introduce alternative novel foraging techniques into replicated wild sub-populations of great tits (Parus major), and employ automated tracking to map the diffusion, establishment and long-term persistence of seeded behaviours. We further use social network analysis to examine social factors influencing diffusion dynamics. From just two trained birds in each sub-population, information spread rapidly through social network ties to reach an average of 75% of individuals, with 508 knowledgeable individuals performing 58,975 solutions. Sub-populations were heavily biased towards the technique originally introduced, resulting in established local arbitrary traditions that were stable over two generations, despite high population turnover. Finally, we demonstrate a strong effect of social conformity, with individuals disproportionately adopting the most frequent local variant when first learning, but then also continuing to favour social over personal information by matching their technique to the majority variant. Cultural conformity is thought to be a key factor in the evolution of complex culture in humans4-7. In providing the first experimental demonstration of conformity in a wild non-primate, and of cultural norms in foraging techniques in any wild animal, our results suggest a much wider evolutionary occurrence of such apparently complex cultural behaviour. PMID:25470065

  13. MODERN CONCEPTS OF CULTURAL INTEGRATION OF SCHOOL’S SOCIAL ENVIRONMENT

    Directory of Open Access Journals (Sweden)

    Jolanta Maciąg

    2017-04-01

    Full Text Available In the case of school as a social institution, factors of cultural nature constitute one of more important aspects of integration. They provide, especially on the higher levels of education, rather strong identifications: with educational activity perceived as a certain form of social service, with a specific school and its traditions, with a professional community and the one of pupils. Those ties, the basis of which is formed by participation in common activities and acceptance for established goals and values – impact the degree of integration with school. An important role in the process of  enculturation  is played by an educational culture of a teacher, which stems  from rules and mechanisms of a scientific theory of work organisation understood as a system of values, methods of work and behavioral patterns  –  and which influences a specific standard of interpersonal relations. An increase in the level of educational culture may constitute a basis for increasing professional independence, expanding the scope of a teacher’s autonomy as well as appreciating the meaning of professional success – an essential factor in the process of shaping professionalism and increasing the effectiveness of teaching and educational activities57. It is particularly important in a period when reality constantly undergoes qualitative transformations. In a similar fashion, the ways of thinking, ethics and responsibility constantly acquire new contexts and meanings, and, at the same time, they require innovative methods of shaping as well as the processes of cultural integration. Key words: integration, culture, social system.57

  14. Strong Ideal Convergence in Probabilistic Metric Spaces

    Indian Academy of Sciences (India)

    In the present paper we introduce the concepts of strongly ideal convergent sequence and strong ideal Cauchy sequence in a probabilistic metric (PM) space endowed with the strong topology, and establish some basic facts. Next, we define the strong ideal limit points and the strong ideal cluster points of a sequence in this ...

  15. Strong ideal convergence in probabilistic metric spaces

    Indian Academy of Sciences (India)

    In the present paper we introduce the concepts of strongly ideal convergent sequence and strong ideal Cauchy sequence in a probabilistic metric (PM) space endowed with the strong topology, and establish some basic facts. Next, we define the strong ideal limit points and the strong ideal cluster points of a sequence in this ...

  16. Bow tie methodology: a tool to enhance the visibility and understanding of nuclear safety cases

    International Nuclear Information System (INIS)

    Vannerem, Marc

    2013-01-01

    There is much common ground between the nuclear industry and other major hazard industries such as those subject to the Seveso II regulations, e.g. oil, gas and chemicals. They are all subject to legal requirements to identify and control hazards, and to demonstrate that all necessary measures have been taken to minimise risks posed by the site with regard to people and the environment. This places a requirement on the Operators of major hazard installations, whether nuclear or conventional, to understand and identify the hazards of their operations, the initiating events, the consequences, the prevention and mitigation measures. However, in the UK, nuclear and 'Seveso' type facilities seem to adopt a different approach to the presentation of their safety cases. Given the magnitude of the hazards, safety cases developed for nuclear fuel cycle facilities are rigorous, detailed and complex, which can have the effect of reducing the visibility of the key hazards and corresponding protective measures. In contrast, on installations in the oil and gas and chemical industries, a real attempt has been made over recent years to improve the visibility and accessibility of the safety case to all operating personnel, through the use of visual aids / diagrams. In particular, many Operators are choosing to use 'bow tie methodology', in which very simple overview diagrams are produced to illustrate, in a form understandable by all: - what the key hazards are; - the initiating events; - the consequences of an incident; - the barriers or 'Layers of Protection' which prevent an initiating event from developing into an incident; - the barriers or 'Layers of Defence' which mitigate the consequences of an incident, i.e. which prevent the incident from escalating into major consequences. The bow tie method is one of a number of methodologies that can be used to make safety cases more accessible. It is used in this paper to illustrate ways to

  17. Cultural Policy in Iceland

    DEFF Research Database (Denmark)

    Gudmundsson, Gestur

    2003-01-01

    The article examines the history of cultural policy in Iceland from a Nordic comparative perspective. National cultural policy takes form in the 19th and early 20th century as a part of the nation-building, emphasising the Icelandic language as the core of national identity, building cultural...... institutions and relying heavily on civic society enterprise. After national independence in 1918 there are growing conflicts in the cultural field and during the Cold War such conflicts take the form of an alliance of nationlism and socialism against NATO-oriented anti-communism. However, there is consensus...... on the continuing emphasis on central cultural institution and the Icelandic language. Since the 1970s Cold War conflicts have been replaced by a consensus on growing support to artists and an armth's length policy, and furthermore the 1990s have seen a strong move towards NPM and international participation....

  18. Remnants of strong tidal interactions

    International Nuclear Information System (INIS)

    Mcglynn, T.A.

    1990-01-01

    This paper examines the properties of stellar systems that have recently undergone a strong tidal shock, i.e., a shock which removes a significant fraction of the particles in the system, and where the shocked system has a much smaller mass than the producer of the tidal field. N-body calculations of King models shocked in a variety of ways are performed, and the consequences of the shocks are investigated. The results confirm the prediction of Jaffe for shocked systems. Several models are also run where the tidal forces on the system are constant, simulating a circular orbit around a primary, and the development of tidal radii under these static conditions appears to be a mild process which does not dramatically affect material that is not stripped. The tidal radii are about twice as large as classical formulas would predict. Remnant density profiles are compared with a sample of elliptical galaxies, and the implications of the results for the development of stellar populations and galaxies are considered. 38 refs

  19. John Strong - 1941-2006

    CERN Document Server

    2006-01-01

    Our friend and colleague John Strong was cruelly taken from us by a brain tumour on 31 July, a few days before his 65th birthday. John started his career and obtained his PhD in a group from Westfield College, initially working on experiments at Rutherford Appleton Laboratory (RAL). From the early 1970s onwards, however, his research was focused on experiments in CERN, with several particularly notable contributions. The Omega spectrometer adopted a system John had originally developed for experiments at RAL using vidicon cameras (a type of television camera) to record the sparks in the spark chambers. This highly automated system allowed Omega to be used in a similar way to bubble chambers. He contributed to the success of NA1 and NA7, where he became heavily involved in the electronic trigger systems. In these experiments the Westfield group joined forces with Italian colleagues to measure the form factors of the pion and the kaon, and the lifetime of some of the newly discovered charm particles. Such h...

  20. Strong seismic ground motion propagation

    International Nuclear Information System (INIS)

    Seale, S.; Archuleta, R.; Pecker, A.; Bouchon, M.; Mohammadioun, G.; Murphy, A.; Mohammadioun, B.

    1988-10-01

    At the McGee Creek, California, site, 3-component strong-motion accelerometers are located at depths of 166 m, 35 m and 0 m. The surface material is glacial moraine, to a depth of 30.5 m, overlying homfels. Accelerations were recorded from two California earthquakes: Round Valley, M L 5.8, November 23, 1984, 18:08 UTC and Chalfant Valley, M L 6.4, July 21, 1986, 14:42 UTC. By separating out the SH components of acceleration, we were able to determine the orientations of the downhole instruments. By separating out the SV component of acceleration, we were able to determine the approximate angle of incidence of the signal at 166 m. A constant phase velocity Haskell-Thomson model was applied to generate synthetic SH seismograms at the surface using the accelerations recorded at 166 m. In the frequency band 0.0 - 10.0 Hz, we compared the filtered synthetic records to the filtered surface data. The onset of the SH pulse is clearly seen, as are the reflections from the interface at 30.5 m. The synthetic record closely matches the data in amplitude and phase. The fit between the synthetic accelerogram and the data shows that the seismic amplification at the surface is a result of the contrast of the impedances (shear stiffnesses) of the near surface materials

  1. Tiesiskas valsts ideja XVII-XVIII gs. Anglijas tiesību filozofu darbos

    OpenAIRE

    Lupiks, Maksims

    2016-01-01

    Maģistra darba tēma ir “Tiesiskas valsts ideja XVII-XVIII gs. Anglijas tiesību filozofu darbos”. Filozofija, mēroja garu attīstības un pilnveidošanās ceļu. Filozofija attīstīja un pilnveidoja cilvēces pašapziņu, kā rezultātā gadu gaitā mainījās sabiedrības uzskati. Pasaulē ir liels filozofu skaits, kuru idejas un darbi tika atzīti un noliegti, publiski iznīcināti, vai pat aizliegti publicēšanai. Daudzi filozofi tika vajāti un pat spiesti atstāt savu valsti. Viens no filozofijas aktuālākajiem ...

  2. Application of Coordinated SOFC and SMES Robust Control for Stabilizing Tie-Line Power

    Directory of Open Access Journals (Sweden)

    Wei Liu

    2013-04-01

    Full Text Available Wind power causes fluctuations in power systems and introduces issues concerning system stability and power quality because of the lack of controllability of its discontinuous and intermittent resources. This paper presents a coordinated control strategy for solid oxide fuel cells (SOFCs and superconducting magnetic energy storage (SMES to match the intermittent wind power generation and compensate for the rapid load changes. An optimal H∞ control method, where the weighting function selection is expressed as an optimization problem, is proposed to mitigate tie-line power fluctuations and the mixed-sensitivity approach is used to deal with the interference suppression. Simulation results show that the proposed method significantly improves the smoothing effect of wind power fluctuations. Compared with the conventional control method, the proposed method has better anti-interference performance in various operating situations.

  3. Technical specification for design, fabrication, use and maintenance of tie-down system

    International Nuclear Information System (INIS)

    Curcuruto, S.; Palmieri, G.; Trivelloni, S.; Orsini, A.

    1993-01-01

    IAEA Safety Series ndeg6 states that to ensure compliance with the Regulation the programs of quality assurance must be put in practice either for design, manufacture, testing, documentation, use and maintenance and inspection of all packages or for transport and intransit storage operations. Therefore in view of a standardization coming from Q.A. criteria, the Italian Competent Authority for transport of radioactive material (ENEA-DISP) is preparing a technical guide for the design, construction, use and maintenance of tie-down system for road transport of packages containing radioactive materials. The paper shows some phases of the program started by ENEA-DISP for the redaction of the technical guide. (J.P.N.)

  4. Assessment of cover to reinforcement in slabs using different spacer and tying distances

    Directory of Open Access Journals (Sweden)

    A. P. Maran

    Full Text Available ABSTRACTGiven that the durability of structures is directly related to the thickness of the cover to reinforcement, it is essential to ensure minimum cover is achieved when building a structure. However, studies show that this is not always the case. One of the reasons for the this problem is the lack of indication, in structural projects, of the positioning of spacers. This situation is compounded by the lack of standards and regulations on the use of spacers (i.e. minimum quantities and required layout. This study assesses three different spacer distances and two different tying distances in order to examine the influence of these factors in the cover to reinforcement. To achieve so, three slabs were prepared in situ using different arrangements. After demoulding, cover thickness was determined using a digital covermeter. It was observed that the factors investigated have a significant influence in the final cover.

  5. Passivity Enhancement of Grid-Tied Converters by Series LC-Filtered Active Damper

    DEFF Research Database (Denmark)

    Bai, Haofeng; Wang, Xiongfei; Loh, Poh Chiang

    2017-01-01

    The series LC-filtered active damper can be used for stabilizing a grid converter tied to the non-ideal grid. Its operation principle is to mimic a damping resistance at the resonance frequencies appearing in the grid. However, the selection of the damping resistance has not been fully analyzed...... in the literature. Its effect with parasitic capacitance present in the grid has also usually been ignored, even though it may bring new challenges to the active damper. To address these issues, passivity is applied to study the grid converter stability before the understanding gained is used for formulating...... the suitability of the presented methods for the series LC-filtered active damper....

  6. The 10% solution: Tying managerial salary increases to workplace wellness actions (and not results).

    Science.gov (United States)

    Robbins, Rebecca; Wansink, Brian

    2016-10-01

    Although manager support is critical for workplace health and wellness efforts, little is known about how to best encourage managers to make creative or bold steps toward employee wellness. We posit that the right interactions between managers and employees could have lasting impact on workplace wellness. To consider how managers might be motivated to take an active role in promoting everyday employee health and wellness, we used a website survey of worksite managers (N = 270) to investigate how tying at least 10% of managerial annual salary increases and promotion would incentivize manager actions in workplace wellness. Overall, regression analyses reveal favorable attitudes from managers and high intentions to implement changes if salary increases and advancement were partially linked to workplace wellness efforts. Managers also expressed a preference for working for a company with this policy, and this was strongest among female managers and managers with a fewer number of subordinates. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  7. Application of TIE's in assessing toxicity associated with oil sands process waters

    International Nuclear Information System (INIS)

    MacKinnon, M.

    1998-01-01

    The hot water digestion process which separates bitumen from oil sands produces large volumes of process-affected waters which are extremely toxic to aquatic organisms. At Syncrude Canada's northeastern Alberta plant, the toxic waters are contained on the site and none are discharged. Organic acids, hydrocarbons and salts are leached into the tailings waters. A toxicity identification evaluation (TIE) test was used to confirm the main contributors to the acute toxicity in these waters. A battery bioassay approach as well as field and laboratory testing was used to understand the source, pathway and duration of the toxicity. Bioassays helped in developing ways in which to mitigate toxicity issues in both reclamation and operational waters. It was demonstrated that natural bioremediation of process-affected waters can reduce acute and chronic toxicity. The long term reclamation impacts of these waters has yet to be determined

  8. [From one generation to another, the threats of the disintegration of social ties].

    Science.gov (United States)

    Blondel, Frédéric; Delzescaux, Sabine

    2010-01-01

    In our modern societies, social ties are reflected in three forms of social relationships which merge with each other: social norms, local social networks and relationships within families. In times of abundance these three forms tend to lead to the same ethical attitude towards elderly and dependent people. Each agrees on the importance of providing a level of care which guarantees elderly people a state of well-being which we would all like to enjoy ourselves. In times of crisis however these three forms tend to fall out of synch with each other as the expectations of one can contradict those of another. What are the risks of such a de-synchronisation in the support given to elderly people?

  9. [The influence of organizational ties in the consolidation of psychosocial care centers].

    Science.gov (United States)

    Alves, Haiana Maria de Carvalho; Dourado, Lidiane Bento Ribeiro; Côrtes, Verônica da Nova Quadros

    2013-10-01

    This article seeks to investigate the influence of organizational ties in the consolidation of Psychosocial Care Centers (CAPS - II and AD [Alcohol and Drugs]) in the city of Petrolina, State of Pernambuco, Brazil. Based on qualitative research, semi-structured interviews were conducted with a multi-professional team from both CAPS, with the sample consisting of one representative from each professional category. A critical review of the data was based on content analysis prepared from categorization of the discourses. The results showed that, in general, the teams do not possess sufficient theoretical knowledge about the system of which they are part. Moreover, although there is a high level of satisfaction, precarious working conditions and a lack of professional recognition and labor input can negatively affect the institutional dynamics. Lastly, a quantitative equivalence was also detected regarding affective and calculative aspects of organizational commitment and a close relationship between length of service and involvement with the work.

  10. Tie-1-directed expression of Cre recombinase in endothelial cells of embryoid bodies and transgenic mice

    DEFF Research Database (Denmark)

    Gustafsson, E; Brakebusch, C; Hietanen, K

    2001-01-01

    germline chimeras. The in vivo efficiency and specificity of the transgenic Cre was analysed by intercrossing the tie-1-Cre line with the ROSA26R reporter mice. At initial stages of vascular formation (E8-9), LacZ staining was detected in almost all cells of the forming vasculature. Between E10 and birth......Tissue-specific gene inactivation using the Cre-loxP system has become an important tool to unravel functions of genes when the conventional null mutation is lethal. We report here the generation of a transgenic mouse line expressing Cre recombinase in endothelial cells. In order to avoid...... the production and screening of multiple transgenic lines we used embryonic stem cell and embryoid body technology to identify recombinant embryonic stem cell clones with high, endothelial-specific Cre activity. One embryonic stem cell clone that showed high Cre activity in endothelial cells was used to generate...

  11. Effects of Aluminum Stress on Protective Enzyme Activity in Tie Guanyin leaves

    Science.gov (United States)

    Sun, JingWei; Du, NaiChen; Zhang, YunFeng

    2018-01-01

    The experiment was adopted to study the change of SOD, CAT and POD activity of Tie guanyin (new leaf and old leaf blade of different concentrations of aluminum stress; in this paper, 0 (CK), 40, 200, four gradients of 400mg/L concentration of Al3+ in acidic conditions, Tieguanyin tea leaf SOD, cat and POD activity changes. The results showed that high concentrations of aluminum stress on antioxidant enzyme system activity cannot continue to increase; at the same time showed that SOD is sensitive to aluminum toxicity concentration change, its sensitivity is higher than CAT and POD, SOD and CAT activity and the aging and decline of plant There was a positive correlation.

  12. LLCL-Filter Based Single-Phase Grid-Tied Aalborg Inverter

    DEFF Research Database (Denmark)

    Wu, Weimin; Feng, Shuangshuang; Ji, Junhao

    2014-01-01

    The Aalborg Inverter is a new type of high efficient DC/AC grid-tied inverter, where the input DC voltage can vary in a wide range. Compared with the LCL-filter, the LLCL-filter can save the total inductance for the conventional voltage source inverter. In this paper, an LLCL-filter based Aalborg...... Inverter is proposed and its character is illustrated through the small signal analysis in both “Buck” and “Buck-Boost” mode. From the modeling, it can be seen that the resonant inductor in the capacitor loop has not brought extra control difficulties, whereas more inductance in the power loop can be saved....... Simulation and experiments are carried out to verify the analysis and the design through an 220 V/50 Hz, 2000 W prototype....

  13. Tie-1-directed expression of Cre recombinase in endothelial cells of embryoid bodies and transgenic mice

    DEFF Research Database (Denmark)

    Gustafsson, E; Brakebusch, C; Hietanen, K

    2001-01-01

    Tissue-specific gene inactivation using the Cre-loxP system has become an important tool to unravel functions of genes when the conventional null mutation is lethal. We report here the generation of a transgenic mouse line expressing Cre recombinase in endothelial cells. In order to avoid...... the production and screening of multiple transgenic lines we used embryonic stem cell and embryoid body technology to identify recombinant embryonic stem cell clones with high, endothelial-specific Cre activity. One embryonic stem cell clone that showed high Cre activity in endothelial cells was used to generate...... germline chimeras. The in vivo efficiency and specificity of the transgenic Cre was analysed by intercrossing the tie-1-Cre line with the ROSA26R reporter mice. At initial stages of vascular formation (E8-9), LacZ staining was detected in almost all cells of the forming vasculature. Between E10 and birth...

  14. Alcohol consumption and social network ties among adolescents: evidence from Add Health.

    Science.gov (United States)

    Ali, Mir M; Amialchuk, Aliaksandr; Nikaj, Silda

    2014-05-01

    Although many studies have estimated the influence of peers on risky health behaviors, few have estimated the gains that adolescents receive from such behaviors, particularly in terms of social payoffs for complying with peer behavior. In this paper, we explore the extent to which alcohol consumption increases popularity of adolescents. Using data from a nationally-representative sample of adolescents, we estimate endogeneity-corrected models with school-level fixed effects to identify the effect of alcohol consumption on social network ties. We find that alcohol consumption leads to an increase in popularity, with the largest gains experienced by white males and females. Our results provide new evidence on the motivation behind adolescent drinking and have important implications for substance abuse interventions. Copyright © 2013 Elsevier Ltd. All rights reserved.

  15. Biosynthesis of Iron Nanoparticles Using Tie Guanyin Tea Extract for Degradation of Bromothymol Blue

    Directory of Open Access Journals (Sweden)

    Haiyan Xin

    2016-01-01

    Full Text Available Facile synthesis of zero-valent iron nanoparticles has been developed using Tie Guanyin tea extract as reducing and stabilizing agent. The characterization carried out by UV-Vis, SEM, TEM, XRD, and FTIR techniques has identified the successful synthesis of the zero-valent iron nanoparticles. It is evident from the TEM result that spherical zero-valent iron nanoparticles with average size of 6.58±0.76 nm have been obtained through biological method in this study. FTIR spectrum demonstrates that the polyphenols play an important role in the synthetic process. Diffraction peak at 2θ of 44.9° and 49.1° in XRD spectrum explains the existence of the iron nanoparticles. Additionally, effect of concentration of iron nanoparticles and concentration of bromothymol blue on the kinetic rate constants during the degradation process was studied.

  16. The large scale use of strippable coatings in preventative, tie-down and decontamination applications

    International Nuclear Information System (INIS)

    Sanders, M.J.; Pengelly, M.G.A.

    1985-05-01

    The use of strippable coatings both to remove and prevent the radioactive contamination of equipment is discussed. Details of application by brush, roller, conventional (air) and airless spray are given. The use of strippable coatings to prevent the components of a re-useable temporary containment system from becoming contaminated is described and results of simple tests in which the coatings were used to remove plutonium dioxide contamination from a number of different surfaces in a Pressurised Suit Area are given. It is concluded that strippable coatings are particularly useful in contamination prevention and tie-down roles but test results indicate that they do not possess overwhelming advantages when used as a decontamination technique. The products used in the work reported here are water based. (author)

  17. Coupled-Inductor-Based DC Current Measurement Technique for Transformerless Grid-Tied Inverters

    DEFF Research Database (Denmark)

    Abdelhakim, Ahmed; Mattavelli, Paolo; Yang, Dongsheng

    2018-01-01

    Grid-tied photovoltaic inverters must fulfill several requirements, including high efficiency and reduced cost and complexity of the overall system. Hence, transformerless operation is advantageous in order to achieve the prior requirements. Meanwhile, such operation results in several demerits...... to the various measurement errors. Accordingly, different blocking and measurement techniques have been proposed and studied to overcome this issue, where some demerits are seen behind each technique such as the implementation complexity, the common-mode voltage problems, and the high filter requirements....... Moreover, none of them measures the dc component directly, but predicts its value using different approaches. Hence, this letter proposes a new technique to measure this dc current component with high accuracy using a coupled inductor combined with a small-range Hall effect current sensor in order...

  18. Public Response to Residential Grid-Tied PV Systems in Colorado: A Qualitative Market Assessment

    Energy Technology Data Exchange (ETDEWEB)

    Farhar, Barbara C. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Buhrmann, Jan [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    1998-07-01

    The early adopters of residential grid-tied photovoltaics (PV) have complex motivations to pay today's costs, including altruistic, environmental, and financial reasons. Focused interviews were conducted with a self-selected purposive sample interested in purchasing 2-kW or 3-kW PV systems with an installed cost of $8,000 to $12,000. The sample tended to be men or married couples ranging in age from their early thirties to their mid-eighties; professionals, managers, or small business owners; relatively financially secure, with experience with energy efficiency and renewable energy. Product attributes they preferred were net metering, warranties, guarantees, utility financing, maintenance, an option to own or lease, a battery option, and an aesthetically pleasing system. Potential PV customers needed more information before making a purchase decision.

  19. Creosote released from railway-ties recycled and the sanitary risks.

    Science.gov (United States)

    Zicari, Giuseppe; Allegro, Giuseppe; Russo, Domenico; Rivetti, Daniela; Soardo, Vincenzo; Cerrato, Elena

    2013-01-01

    Through the history of railways, wooden crossties impregnated with potentially hazardous creosote tar, have been used for years. There are six major classes of compounds in the creosote: aromatic hydrocarbons; tar acids/phenolics; tar bases/nitrogen-containing heterocycles; aromatic amines; sulfur-containing heterocycles; and oxygen-containing heterocycles. The creosote molecules applied in railway crossties can be released in the environment and they can bioaccumulate in animals and vegetables. Some constituents (benzo(a)pyrene and phenolics like benzene) are considered as being carcinogenic which renders the entire complex of creosote to be classified as potentially carcinogenic. After several decades of use the railway-ties are been recycled for varies uses like fences, stakes for agriculture and fruit production or bank protection. In this paper are examined some environmental and sanitary risks from wood impregnated with creosote reported in the literature.

  20. Strongly interacting photons and atoms

    International Nuclear Information System (INIS)

    Alge, W.

    1999-05-01

    This thesis contains the main results of the research topics I have pursued during the my PhD studies at the University of Innsbruck and partly in collaboration with the Institut d' Optique in Orsay, France. It is divided into three parts. The first and largest part discusses the possibility of using strong standing waves as a tool to cool and trap neutral atoms in optical cavities. This is very important in the field of nonlinear optics where several successful experiments with cold atoms in cavities have been performed recently. A discussion of the optical parametric oscillator in a regime where the nonlinearity dominates the evolution is the topic of the second part. We investigated mainly the statistical properties of the cavity output of the three interactive cavity modes. Very recently a system has been proposed which promises fantastic properties. It should exhibit a giant Kerr nonlinearity with negligible absorption thus leading to a photonic turnstile device based on cold atoms in cavity. We have shown that this model suffers from overly simplistic assumptions and developed several more comprehensive approaches to study the behavior of this system. Apart from the division into three parts of different contents the thesis is divided into publications, supplements and invisible stuff. The intention of the supplements is to reach researchers which work in related areas and provide them with more detailed information about the concepts and the numerical tools we used. It is written especially for diploma and PhD students to give them a chance to use the third part of our work which is actually the largest one. They consist of a large number of computer programs we wrote to investigate the behavior of the systems in parameter regions where no hope exists to solve the equations analytically. (author)