scholarly journals Heterotic anomaly cancellation in five dimensions

2000 ◽  
Vol 2000 (01) ◽  
pp. 010-010 ◽  
Author(s):  
André Lukas ◽  
Kellog S Stelle
Keyword(s):  
Anomaly Cancellation ◽  
Five Dimensions

scholarly journals Ambitwistor strings in six and five dimensions

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Yvonne Geyer ◽  
Lionel Mason ◽  
David Skinner
Keyword(s):  
Conformal Group ◽  
Anomaly Cancellation ◽  
Null Geodesics ◽  
Five Dimensions ◽  
Yang Mills ◽  
Conformally Invariant ◽  
Gravity Theories ◽  
Supersymmetric Gauge ◽  
Invariant Gauge ◽  
Gauge Anomaly

Abstract Ambitwistor strings are chiral (holomorphic) strings whose target is the space of complex null geodesics, ambitwistor space. We introduce twistor representations of ambitwistor space in 6 and 5 dimensions. In 6d the twistor representation is naturally conformally invariant. Anomaly cancellation leads to models that describe biadjoint scalar amplitudes and certain conformally invariant gauge and gravity theories, respectively of 4th and 6th order. There are three such models, reflecting triality for the conformal group SO(8) associated to these 6d models. On reduction to five dimensions, gauge anomaly cancellation requires supersymmetry and the resulting models describe maximally supersymmetric Yang-Mills and gravity. The twistor representation of these ambitwistor strings lead to formulæ for maximally supersymmetric gauge and gravity amplitudes based on the polarized scattering equations in 5d, found earlier by the first two authors.

scholarly journals Anomalies as obstructions: from dimensional lifts to swampland

2022 ◽  
Vol 2022 (1) ◽  
Author(s):  
Peng Cheng ◽  
Ruben Minasian ◽  
Stefan Theisen
Keyword(s):  
Dimensional Reduction ◽  
One Dimension ◽  
Necessary Condition ◽  
Geometric Form ◽  
Anomaly Cancellation ◽  
Five Dimensions ◽  
Singularity Structure ◽  
Positivity Condition ◽  
Six Dimensions ◽  
Chern Simons

Abstract We revisit the relation between the anomalies in four and six dimensions and the Chern-Simons couplings one dimension below. While the dimensional reduction of chiral theories is well-understood, the question which three and five-dimensional theories can come from a general circle reduction, and are hence liftable, is more subtle. We argue that existence of an anomaly cancellation mechanism is a necessary condition for liftability. In addition, the anomaly cancellation and the CS couplings in six and five dimensions respectively determine the central charges of string-like BPS objects that cannot be consistently decoupled from gravity, a.k.a. supergravity strings. Following the completeness conjecture and requiring that their worldsheet theory is unitary imposes bounds on the admissible theories. We argue that for the anomaly-free six-dimensional theories it is more advantageous to study the unitarity constraints obtained after reduction to five dimensions. In general these are slightly more stringent and can be cast in a more geometric form, highly reminiscent of the Kodaira positivity condition (KPC). Indeed, for the F-theoretic models which have an underlying Calabi-Yau threefold these can be directly compared. The unitarity constraints (UC) are in general weaker than KPC, and maybe useful in understanding the consistent models without F-theoretic realisation. We catalogue the cases when UC is more restrictive than KPC, hinting at more refined hidden structure in elliptic Calabi-Yau threefolds with certain singularity structure.

Interdisciplinary Client Care with the Neuman Systems Model

1998 ◽  
Vol 6 (3) ◽  
pp. 310-319
Author(s):  
Kevin M. Marett ◽  
Rae Jeanne Memmott ◽  
W. Eugene Gibbons ◽  
Randy L. Bott ◽  
Lee Duke
Keyword(s):  
Interdisciplinary Team ◽  
Common Language ◽  
Complete Understanding ◽  
Content Areas ◽  
Five Dimensions ◽  
Neuman Systems Model ◽  
Systems Model ◽  
Client Care ◽  
Neuman Systems ◽  
Client System

This article describes how the Neuman Systems Model (NSM) can be used in a two-step process to provide both the form and the function for interdisciplinary client care. The NSM proposes five dimensions of human experience as being necessary for a complete understanding of a client system. This article takes these five content areas—psychological, physiological, spiritual, developmental, and sociocultural—and extrapolates them to their respective disciplines (e.g. nursing, social work, religion, psychology, etc.) to create a comprehensive interdisciplinary model for client care. The NSM also provides a common language and conceptual paradigm, congruent with allied disciplines. A demonstration project incorporating the NSM in the formation and functioning of an interdisciplinary team is described.

The Performance Of The National Narcotics Agency In Illegal Drugs Prevention Efforts Of Palu City, Central Sulawesi, Indonesia

2020 ◽  
Vol 2 (1) ◽  
pp. 1-7
Author(s):  
Andi Pasinringi
Keyword(s):  
Data Collection ◽  
Service Quality ◽  
Qualitative Approach ◽  
City Government ◽  
Performance Theory ◽  
Illegal Drugs ◽  
Five Dimensions ◽  
Public Bureaucracy ◽  
Central Sulawesi ◽  
Drug Free

This study aims to determine the performance of Badan Narkotika Nasional or the National Narcotics Agency of Palu in the narcotics prevention efforts, determined by the support of the main tasks and functions of the National Narcotics Agency Office of Palu. The theory used to assess performance is with five dimensions of theory to measure the performance of public bureaucracy which are Productivity, Service Quality, Responsiveness, Responsibility, and Accountability as proposed by Agus Dwiyanto (2002). This research utilized descriptive-qualitative approach. Data collection techniques used are but not limited to: Observation, Interview, and Documentation. Informants in this study are determined purposively. The results of the study revealed that based on the five dimensions of performance theory from Agus Dwiyanto, it can be concluded that the performance of the National Narcotics Agency of Palu is not insufficient. Thus, the vision proclaimed by the Palu City Government which was the Realization of Government and Community Synergy Towards Drug-Free Palu City in 2015, was not achieved

scholarly journals ICT, Disability, and Motivation: Validation of a Measurement Scale and Consequence Model for Inclusive Digital Knowledge

2021 ◽  
Vol 18 (13) ◽  
pp. 6770
Author(s):  
Marta Medina-García ◽  
Lina Higueras-Rodríguez ◽  
Mª del Mar García-Vita ◽  
Luis Doña-Toledo
Keyword(s):  
Inclusive Education ◽  
Positive Impact ◽  
Measurement Scale ◽  
Ict Literacy ◽  
Information Communication ◽  
Five Dimensions ◽  
Care And Support ◽  
Education Levels ◽  
Digital Knowledge ◽  
Educational Inclusion

The use of ICT (information communication technology) as an educational resource is becoming more evident in the education systems of most countries, even more so with the COVID-19 crisis. When it comes to disability and education, ICT becomes a tool for social and educational inclusion. This study presents the validation and evaluation of a measurement scale on ICT literacy for inclusive education. In addition, based on previous literature, a conceptual model is proposed and validated through PLS (partial least squares) using a sample of 142 teachers from all educational stages. The results show that teachers’ ICT knowledge to ensure inclusion consists of five dimensions on specific needs. ICT knowledge has a positive impact on teacher motivation and ICT use. Teachers at primary and early childhood education levels have a lower motivation and use of ICT, although they have a higher knowledge of disability. The results found allow progress to be made in measuring the educational inclusion of schools and the ICT knowledge needed to ensure care and support for all people. A notable implication is the need for training on ICT and disability within educational policies.

scholarly journals Why Is Green Hotel Certification Unpopular in Taiwan? An Analytic Hierarchy Process (AHP) Approach

2021 ◽  
Vol 10 (4) ◽  
pp. 255
Author(s):  
Yen-Cheng Chen ◽  
Ching-Sung Lee ◽  
Ya-Chuan Hsu ◽  
Yin-Jui Chen
Keyword(s):  
Analytic Hierarchy Process ◽  
Environmental Protection ◽  
Hotel Industry ◽  
Corporate Image ◽  
Analytic Hierarchy ◽  
Five Dimensions ◽  
Incentive Policy ◽  
Weighted Analysis ◽  
Green Hotel ◽  
Hierarchy Process

The main purpose of this study was to investigate the factors that discouraged Taiwan hoteliers from applying for green hotel certification. The analytic hierarchy process (AHP) method was used to perform a weighted analysis that comprehensively identified important hindering factors based on information from hotel industry, government, academic, and consumer representatives. Overall, in order of importance, the five dimensions of hindering factors identified by these experts and scholars were hotel internal environment, consumers’ environmental protection awareness, environmental protection incentive policy, hotel laws and regulations policy, and hotel external environment. Among the 26 examined hindering factor indices, the three highest-weighted indices overall for hoteliers applying for green hotel certification were as follows: environmental protection is not the main consideration of consumers seeking accommodations, lack of support by investment owners (shareholders), and lack of relevant subsidy incentives. The major contribution of this study is that hoteliers can understand important hindering factors associated with applying for green hotel certification; therefore, strategies that can encourage or enhance the green certification of hotels can be proposed to improve corporate image in the hotel industry, implement social responsibility in this industry, and obtain consumers’ approval of and accommodation-willingness for green hotels.

The Success of Rosé Wine in France: The Millennial Revolution

2021 ◽  
pp. 193896552199313
Author(s):  
Thierry Lorey
Keyword(s):  
Millennial Generation ◽  
Social Representation ◽  
Point Of View ◽  
Predictive Capacity ◽  
Five Dimensions ◽  
Wine Consumption ◽  
Baby Boomer Generation ◽  
Sociocultural Model ◽  
Generational Groups ◽  
Rosé Wine

Rosé wine consumption in France has tripled since 1992 and, in 2020, accounts for a third of the total national consumption. The objective of our article is to analyze the revolutionary success of rosé wine in France in the Millennial Generation. We mobilize the concept of social representation, which constitutes an understanding of the social transformations in progress for a given social group. We carry out in-depth qualitative research based on conversations with millennial rosé wine consumers. Our results show that the representations of rosé wine for this group are based on five dimensions: (a) product quality and refusal of sophistication, (b) color of the rosé wine, (c) freedom, (d) immediate pleasure and sharing with friends, and (e) its feminine personality. This transgressive capital explains the consumption behaviors of the Millennial Generation reflecting the group’s will to break traditional wine codes familiar to previous generational groups. This sociocultural model differs from that of the Baby Boomer Generation, which was marked by the valorization of terroir and sophistication and based on masculine archetypes and red wine. Rosé wine thus marks a generational and sociological break in the representations of wine in France, which we can describe as a rosé wine revolution in the 21st century. The predictive capacity of the Millennial Generation suggests a growth in rosé wine consumption in the years to come. We recommend to rosé wine producers seven strategic axes, which reconcile the point of view of the producer and the consumer.

scholarly journals Geometric particle-in-cell methods for the Vlasov–Maxwell equations with spin effects

2021 ◽  
Vol 87 (3) ◽  
Author(s):  
Nicolas Crouseilles ◽  
Paul-Antoine Hervieux ◽  
Yingzhe Li ◽  
Giovanni Manfredi ◽  
Yajuan Sun
Keyword(s):  
Phase Space ◽  
Maxwell Equations ◽  
Stimulated Raman Scattering ◽  
Extended Phase ◽  
Five Dimensions ◽  
Particle In Cell ◽  
Spin Effects ◽  
Dimensional Phase Space ◽  
Spin Polarized ◽  
Underdense Plasma

We propose a numerical scheme to solve the semiclassical Vlasov–Maxwell equations for electrons with spin. The electron gas is described by a distribution function $f(t,{\boldsymbol x},{{{\boldsymbol p}}}, {\boldsymbol s})$ that evolves in an extended 9-dimensional phase space $({\boldsymbol x},{{{\boldsymbol p}}}, {\boldsymbol s})$ , where $\boldsymbol s$ represents the spin vector. Using suitable approximations and symmetries, the extended phase space can be reduced to five dimensions: $(x,{{p_x}}, {\boldsymbol s})$ . It can be shown that the spin Vlasov–Maxwell equations enjoy a Hamiltonian structure that motivates the use of the recently developed geometric particle-in-cell (PIC) methods. Here, the geometric PIC approach is generalized to the case of electrons with spin. Total energy conservation is very well satisfied, with a relative error below $0.05\,\%$ . As a relevant example, we study the stimulated Raman scattering of an electromagnetic wave interacting with an underdense plasma, where the electrons are partially or fully spin polarized. It is shown that the Raman instability is very effective in destroying the electron polarization.

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