1,303 research outputs found
The algebraic Bethe ansatz for open vertex models
We present a unified algebraic Bethe ansatz for open vertex models which are
associated with the non-exceptional
Lie algebras.
By the method, we solve these models with the trivial K matrix and find that
our results agree with that obtained by analytical
Bethe ansatz. We also solve the models with
some non-trivial diagonal K-matrices (one free parameter case) by the algebraic
Bethe ansatz.Comment: Latex, 35 pages, new content and references are added, minor
revisions are mad
Algebraic Bethe ansatz for the one-dimensional Hubbard model with open boundaries
The one-dimensional Hubbard model with open boundary conditions is exactly
solved by means of algebraic Bethe ansatz. The eigenvalue of the transfer
matrix, the energy spectrum as well as the Bethe ansatz equations are obtained.Comment: Only LaTex file; no figur
Milling plant and soil material in plastic tubes over-estimates carbon and under-estimates nitrogen concentrations
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CostâEffectiveness of GroupâBased Outpatient Physical Therapy After Total Knee Replacement: Results From the Economic Evaluation Alongside the ARENA Multicenter Randomized Controlled Trial
Objective
To assess the cost-utility and cost-effectiveness of a group-based outpatient physical therapy intervention delivered 6âweeks after primary total knee replacement (TKR) compared with usual care, alongside the Activity-Orientated Rehabilitation Following Knee Arthroplasty (ARENA) multicenter, randomized, controlled trial.
Methods
The economic analyses were performed from the perspective of the health and social care payer. We collected resource use for health and social care and productivity losses and patient outcomes for 12 months after surgery to derive costs and quality-adjusted life years (QALYs). Results were expressed in incremental cost-effectiveness ratios (ICERs), and incremental net monetary benefit statistics (INMBs) for a society willingness-to-pay (WTP) threshold of ÂŁ20,000 per QALY gained, with sensitivity analyses to model specification and perspective.
Results
The cost of the ARENA physical therapy classes was meanâ±âSD ÂŁ179â±â39 per patient. Treatment in the year following surgery cost was, on average, ÂŁ1,739 (95% confidence interval [95% CI] âÂŁ742, ÂŁ4,221) per patient in the intervention group (n = 89), which was an additional ÂŁ346 (95% CI ÂŁ38, ÂŁ653) per patient compared with usual care (n = 91) (ÂŁ1,393 [95% CI âÂŁ780, ÂŁ3,568]). QALY benefits were 0.0506 higher (95% CI 0.009, 0.09) in the intervention group, corresponding to an additional 19âdays in âperfect health.â The ICER for the intervention group was ÂŁ6,842 per QALY gained, and the INMB was ÂŁ665 (95% CI ÂŁ139, ÂŁ1,191), with a 92% probability of being cost-effective, and no less than 73% in all sensitivity analysis scenarios.
Conclusion
The addition of group-based outpatient physical therapy classes to usual care improves quality of life and is a cost-effective treatment option following TKR for a society WTP threshold of ÂŁ20,000 per QALY gained
Hasbara 2.0: Israelâs Public Diplomacy in the Digital Age
The Internet has been a counter-public space for Palestinian liberation politics for over a decade, and digital technologies have become an increasingly important tool for solidarity groups across the world. However, the Israeli state and Zionist supporters worldwide are harnessing the same technologies and platforms to mobilize technology primarily to increase pro-Israel sentiments. The aims of this article are to examine hasbara [Israeli public diplomacy] through an exploration of similar diplomacy programmes; to illustrate how social media have affected the basic algorithms of hasbara; and to probe the assertions of hasbara in the light of pro-Palestinian solidarity. Through a study of public diplomacy, this article critically analyzes hasbara as a site of contestation and a method that is hampered by contradictions. On the one hand, there has been a massive growth in hasbara in recent yearsâindicated by the increase in funding for it and by its professionalized and centralized character; and on the other hand, hasbara has attracted sharp critiques in Israel for its reputed failures. To understand this contradiction, hasbara must be placed within the context of Israelâs settler-colonialism, which sets the state apart from other âpost-conflictâ states. This article reviews the methods utilized in hasbara, as well as their readjustment in the context of recent wars. Events in 2014 illustrate that hasbara actually destabilizes Israelâs diplomacy. Online journalism and the suppression of solidarity for Palestine together stimulate more criticism and, in turn, help to shift public opinion. Paradoxically, therefore, adjustments (âhasbara 2.0â) have underlined the image of Israel as a colonial power engaged in violent occupation
Heavy-baryon chiral perturbation theory and reparametrization invariance
We examine the constraints imposed by reparametrization invariance on
heavy-baryon chiral perturbation theory (HBChPT). We study the case of 3
flavors and consider both the strong and weak () interaction
sector. Some of the parameters in the HBChPT Lagrangian are fixed as a
consequence of reparametrization invariance. We discuss the consequences for
the calculation of hyperon weak radiative decays in HBChPT.Comment: 8 pages, Latex, no figure
Effective Lagrangian description of the lepton flavor violating decays Z-->li lj
A comprehensive analysis of the lepton flavor violating (LFV) decays Z-->li
lj is presented within the effective Lagrangian approach. Both the decoupling
and nondecoupling scenarios are explored. The experimental constraints from li
--> lj lk \bar{lk} and li -->lj gamma as well as some relationships arising
from the gauge invariance of the effective Lagrangian are used to put
constraints on Z-->li lj. It is found that while current experimental data
impose very strong constraints on Z-->mu e, the channel Z --> tau mu (e)still
may be at the reach of the planned TESLA collider.Comment: References added, final version to appear in Physical Review
Mirror Mirror on the Wall, Which Is the Most Convincing of Them All? Exploring Anti-Domestic Violence Posters.
Although domestic abuse of women by men has received significant media, police, and research attention, domestic violence directed toward men has been marginalized across the board and is still rarely treated seriously. The purpose of this research, then, is to examine and compare different anti-domestic violence messages in which the abuser's gender is not always clear. In Study 1, 200 U.K. participants (100 females and 100 males, aged 18-67, M = 28.98, SD = 9.613) evaluated posters that varied across three levels; in that the subject (male or female) was depicted as being silenced, bruised, or experiencing live abuse. The results showed that the posters featuring female victims were all rated as more effective than posters showing male victims. In Study 2, 140 different U.K. participants (95 females; 45 males) aged 18 to 59 (M = 27.27, SD = 10.662) evaluated the cartoon facial images of Disney characters who had been altered to look like victims of violence and real-life corresponding photos of human models. The results showed that the realistic posters were found to be more believable, emotional, and effective than the cartoons. The implications of such perceptions are discussed
Nested-grid simulation of mercury over North America
We have developed a new nested-grid mercury (Hg) simulation over North
America with a 1/2° latitude by 2/3° longitude
horizontal resolution employing the GEOS-Chem global chemical transport
model. Emissions, chemistry, deposition, and meteorology are self-consistent
between the global and nested domains. Compared to the global model
(4° latitude by 5° longitude), the nested model shows
improved skill at capturing the high spatial and temporal variability of Hg
wet deposition over North America observed by the Mercury Deposition Network
(MDN) in 2008â2009. The nested simulation resolves features such as
higher deposition due to orographic precipitation, land/ocean contrast and
and predicts more efficient convective rain scavenging of Hg over the
southeast United States. However, the nested model overestimates Hg wet
deposition over the Ohio River Valley region (ORV) by 27%. We modify
anthropogenic emission speciation profiles in the US EPA National Emission
Inventory (NEI) to account for the rapid in-plume reduction of reactive to
elemental Hg (IPR simulation). This leads to a decrease in the model bias to
â2.3% over the ORV region. Over the contiguous US, the correlation
coefficient (<i>r</i>) between MDN observations and our IPR simulation increases
from 0.60 to 0.78. The IPR nested simulation generally reproduces the
seasonal cycle in surface concentrations of speciated Hg from the
Atmospheric Mercury Network (AMNet) and Canadian Atmospheric Mercury Network
(CAMNet). In the IPR simulation, annual mean gaseous and particulate-bound
Hg(II) are within 140% and 11% of observations, respectively. In
contrast, the simulation with unmodified anthropogenic Hg speciation
profiles overestimates these observations by factors of 4 and 2 for gaseous
and particulate-bound Hg(II), respectively. The nested model shows improved
skill at capturing the horizontal variability of Hg observed over California
during the ARCTAS aircraft campaign. The nested model suggests that North
American anthropogenic emissions account for 10â22% of Hg wet deposition
flux over the US, depending on the anthropogenic emissions speciation
profile assumed. The modeled percent contribution can be as high as 60%
near large point sources in ORV. Our results indicate that the North
American anthropogenic contribution to dry deposition is 13â20%
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