Contrasting SYK-like Models

We contrast some aspects of various SYK-like models with large-$N$ melonic behavior. First, we note that ungauged tensor models can exhibit symmetry breaking, even though these are 0+1 dimensional theories. Related to this, we show that when gauged, some of them admit no singlets, and are anomalous. The uncolored Majorana tensor model with even $N$ is a simple case where gauge singlets can exist in the spectrum. We outline a strategy for solving for the singlet spectrum, taking advantage of the results in arXiv:1706.05364, and reproduce the singlet states expected in $N=2$. In the second part of the paper, we contrast the random matrix aspects of some ungauged tensor models, the original SYK model, and a model due to Gross and Rosenhaus. The latter, even though disorder averaged, shows parallels with the Gurau-Witten model. In particular, the two models fall into identical Andreev ensembles as a function of $N$. In an appendix, we contrast the (expected) spectra of AdS$_2$ quantum gravity, SYK and SYK-like tensor models, and the zeros of the Riemann Zeta function.Comment: 45 pages, 17 figures; v2: minor improvements and rearrangements, refs adde

Protonospheric electron concentration profiles Final report

Protonospheric electron concentration profiles based on Doppler and Faraday effect

Survey Tools for Measuring Research or Evidence‐Based Practice Constructs in Dietetics: A Narrative Review

Background: Exact quantification of research conducted by dietitians and tracking the effectiveness of interventions or training programs to increase either evidence-based practice (EBP) or research behaviours have been hampered by the variety of tools used to measure these constructs. Methods: In this narrative review, we identified and classified the various tools previously used to measure constructs related to research and/or EBP in the dietetics profession, and to summarise estimates of the constructs measured. Results: We identified and classified 15 scored tools that had been used at least once in the dietetics profession and extracted tool parameter estimates from 22 resulting papers. We also identified six unscored tools and three qualitative studies. The most frequent constructs measured were attitudes and behaviours. Very few tools measured objective knowledge (skills). No objective measures of research outputs were identified. Several tools were closely related to one another. Conclusions: Even when tools were used across multiple papers, reporting method varied making comparisons difficult. This review should encourage future researchers to utilise existing tools when possible, and encourage the development or adaptation and testing of tools that fill identified gaps. The constructs measured by the tools identified may also provide a starting point for the development of educational interventions aiming to increase research or EBP skills among dietitians. Only by using consistent tools will the dietetics profession be able to track the progress in increasing research conduct and EBP implementation over time

Surface topography of hydroxyapatite affects ROS17/2.8 cells response

Hydroxyapatite (HA) has been used in orthopedic, dental, and maxillofacial surgery as a bone substitute. The aim of this investigation was to study the effect of surface topography produced by the presence of microporosity on cell response, evaluating: cell attachment, cell morphology, cell proliferation, total protein content, and alkaline phosphatase (ALP) activity. HA discs with different percentages of microporosity (< 5%, 15%, and 30%) were confected by means of the combination of uniaxial powder pressing and different sintering conditions. ROS17/2.8 cells were cultured on HA discs. For the evaluation of attachment, cells were cultured for two hours. Cell morphology was evaluated after seven days. After seven and fourteen days, cell proliferation, total protein content, and ALP activity were measured. Data were compared by means of ANOVA and Duncan’s multiple range test, when appropriate. Cell attachment (p = 0.11) and total protein content (p = 0.31) were not affected by surface topography. Proliferation after 7 and 14 days (p = 0.0007 and p = 0.003, respectively), and ALP activity (p = 0.0007) were both significantly decreased by the most irregular surface (HA30). These results suggest that initial cell events were not affected by surface topography, while surfaces with more regular topography, as those present in HA with 15% or less of microporosity, favored intermediary and final events such as cell proliferation and ALP activity

Education Safety For Cosmetology In The Dallas Independent School District

It is most pertinent that safety habits be established and practiced, because of the essentiality placed upon human being. It is imperative that attention be given to the welfare and health of the individual* There is probably no other problem which is of rare increasing concern everywhere than safety—safety in the home, on the highway, in industry and school. host accidents in a beauty school are preventable. They do not just happen they are caused. It is obvious that they are caused by carelessness, ignorance, or negligence on somebody\u27s part. Accidents result from mistakes of individuals and misuse of materials and equipment. The vocational teacher undoubtedly can exert more influence. in having students to become safety-conscious than anyone else* A \u27well-qualified teacher, moreover, can keep unsafe student behavior at a minimum by providing his class with careful instruction, conscientious supervision, and intelligent, sympathetic guidance. THE PROBLEM Statement of the Problem.This study is an attempt to find out how adequately Cosmetology Departments in Dallas County Senior Schools meet safety standards set-up by the Texas State Board of Hairdressers and Cosmetologists and Texas Education Agency, ln approaching this problem, it is anticipated that the results of the findings will answer the following questions: 1* What are the Tarns State Board of Hairdressers and Cosmetologists Safety Standards fear Beauty Culture? 2 What are the Texas Education Agency Safety- Standards? 3 To What extent does the cosmetology instructor agree with these standards? 4. How well does the cosmetology instructor try to meet these standards? 5. To what extent has the cosmetology instructor prepared safety standards of her own? 6. Does knowing, practicing, and having necessary equipment reduce accidents in the cosmetology department

A fascinating multifaceted redox-active chelating ligand: introducing the N,N′-dimethyl-3,3′-biquinoxalinium “methylbiquinoxen” platform

To intimately combine a chelating ligand function with the numerous properties of a viologen-like redox-active centre would offer a rare possibility to design controllable multi-redox states, whose properties arise from strongly correlated phenomena between the organic ligand as well as with any metalloid coordinated centres. Such a concept previously proved to be feasible, however is not widely applicable owing to challenges in terms of synthesis, isolation, and aerial sensitivity of both the ligand and its metal complexes. Here we report the first stable example of such a redox-active molecule, N,N′-dimethyl-3,3′-biquinoxalinium2+/˙+/0 “methylbiquinoxen, MBqn2+/˙+/0”, which shows a rich redox chemistry and chelates a metal ion in the case of the metal complex [CdCl2(MBqn0)]. This goes beyond what is possible to achieve using viologens, which are limited by not providing chelation as well as having no accessible biradicaloid state, corresponding to the neutral direduced MBqn0 open-shell behaviour we observe here

The dust mass in z > 6 normal star forming galaxies

We interpret recent ALMA observations of z > 6 normal star forming galaxies by means of a semi-numerical method, which couples the output of a cosmological hydrodynamical simulation with a chemical evolution model which accounts for the contribution to dust enrichment from supernovae, asymptotic giant branch stars and grain growth in the interstellar medium. We find that while stellar sources dominate the dust mass of small galaxies, the higher level of metal enrichment experienced by galaxies with Mstar > 10^9 Msun allows efficient grain growth, which provides the dominant contribution to the dust mass. Even assuming maximally efficient supernova dust production, the observed dust mass of the z = 7.5 galaxy A1689-zD1 requires very efficient grain growth. This, in turn, implies that in this galaxy the average density of the cold and dense gas, where grain growth occurs, is comparable to that inferred from observations of QSO host galaxies at similar redshifts. Although plausible, the upper limits on the dust continuum emission of galaxies at 6.5 < z < 7.5 show that these conditions must not apply to the bulk of the high redshift galaxy populationComment: 5 pages, 2 figures, accepted for publication as a Letter to MNRA

Determinants of food selection by bivalve larvae

Selection of food particles for consumption by larvae impacts nutritional gain needed for growth, development, and metamorphosis. Past work has suggested that molluscan larvae are capable of collecting food within a narrow size range. Recent studies have found evidence of size-independent food selection in molluscan larvae, but relatively little is known about the characteristics of particles that larvae preferentially capture. Therefore, we conducted experiments with the larvae of two mussels, Mytilus trossulus and Mytilus edulis, to determine whether they are selective feeders, and if so, whether we could determine the characteristics of particles selected as food. We fed larvae microalgae and polystyrene microspheres of different sizes, nutritional content, surface charge, and hydrophobicity. We found that for both species, there was no effect of size on particle selection for particles 2–8 μm, but, surprisingly, these two congeners preferentially captured particles with different characteristics. Larvae of M. trossulus preferentially captured particles that were more hydrophilic and had a more negativesurface charge, but there was no effect of nutritional content. The larvae of M. edulis showed a different pattern; they preferentially captured particles with low surface charge and greater food value, but hydrophobicity did not affect selection. Larvae of these two congeners are indeed selective in which particles they collect but appear to be using different rules for selection. More work is needed to determine whether there are any general patterns that govern particle selection for larvae and mechanisms that could produce the observed patterns. Such work is needed to help us to determine whether individual species use different rules or whether there are general patterns in the types of particles larvae select