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Article ; Online: Visual Discrete Format

Daniel Solis / David Hutchinson / Nancy Longnecker

International Journal of Cognitive Research in Science, Engineering and Education, Vol 10, Iss

An Alternative to Likert-Type Formats of Survey Items Sensitive Enough to Measure Small Changes in Stable Constructs Such as Self-Concept in Science

2022 Volume 2

Abstract: A visual discrete format was developed for use in surveys as an alternative to a Likert-type format to measure changes in a relatively stable construct before and after an intervention. Visitors to a science centre ranging in age from 8 years old upwards ...

Abstract	A visual discrete format was developed for use in surveys as an alternative to a Likert-type format to measure changes in a relatively stable construct before and after an intervention. Visitors to a science centre ranging in age from 8 years old upwards were asked to complete surveys that included a seven-item questionnaire scale on self-concept in science using either the Likert-type format (n=446) or the visual discrete format (n=375), before and after their visit. A new set of statements to assess self-concept in science were developed and validated so they could be conducted on either format. Matched responses were used to calculate internal consistency, standard deviation, confidence interval and percentage of missing values; these were all similar for both formats. In the visual discrete format, text labels were replaced by visual labels with a single image of different size for each response option. While a Likert-type format describes a level of agreement/disagreement with a specific item, the visual discrete format relates more to choosing the best reflection of the self in relation to that item. The Likert-type format included a set of emoji in its descriptions to appeal to younger participants. The visual discrete questionnaire scale detected a small increase with medium effect size in self-concept in science after the visit to the science centre while the Likert-type questionnaire scale did not detect any change. This suggests the proposed new format can not only be a viable and useful alternative, but potentially more sensitive under certain conditions.
Keywords	Likert-type scale ; visual discrete scale ; visual discrete format ; self-concept in science ; scientific literacy ; questionnaire ; Education (General) ; L7-991 ; Engineering (General). Civil engineering (General) ; TA1-2040
Subject code	028
Language	English
Publishing date	2022-08-01T00:00:00Z
Publisher	Association for the Development of Science, Engineering and Education
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Documenting State Violence

Gabriel Daniel Solis

KULA, Vol 2, Iss

(Symbolic) Annihilation & Archives of Survival

2018 Volume 1

Abstract: This essay explores symbolic annihilation in the context of state violence, including policing, incarceration, and the death penalty in the US. Using auto-ethnography to reflect on the work of the Texas After Violence Project (TAVP) and other community- ... ...

Abstract	This essay explores symbolic annihilation in the context of state violence, including policing, incarceration, and the death penalty in the US. Using auto-ethnography to reflect on the work of the Texas After Violence Project (TAVP) and other community-based documentation and archival projects, I argue that the personal stories and experiences of victims and survivors of state violence are critical counter-narratives to dominant discourses on violence, criminality, and the purported efficacy of retributive law enforcement and criminal justice policies and practices. They also compel us to engage with complex questions about victimhood, disposability, and accountability. Building on the work of activists and archivists engaged in liberatory memory work, I also argue that counter-narratives of state violence confront and challenge the social, cultural, and ideological power of symbolic annihilation. Because these counter-narratives are under constant threat of being suppressed, co-opted, or silenced, they are forms of endangered knowledge that must be protected and preserved. Finally, I reflect on ‘archives of survival,’ repositories of stories and other ephemera of tragedy that contribute to envisioning and achieving transformative justice.
Keywords	state violence ; symbolic annihilation ; liberatory archives ; liberatory memory work ; dehumanization ; police violence ; mass incarceration ; death penalty ; Bibliography. Library science. Information resources ; Z
Subject code	360
Language	English
Publishing date	2018-11-01T00:00:00Z
Publisher	University of Victoria Libraries
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Trifluoromethyl-stabilized 2D nitrogen clusters: a theoretical study

Narváez, Wilmer Esteban Vallejo / de la Garza, Cesar Gabriel Vera / Rodríguez, Luis Daniel Solís / Fomina, Lioudmila / Fomine, Serguei

J Mol Model 2022, v. 28, no. 8, p. 217

2022 , Page(s) 217

Abstract: The stability of 2D all nitrogen clusters containing from 6 to 96 nitrogen atoms, terminated with CF₃ groups, has been explored using two computational models: dispersion corrected B3LYP functional and scaled opposite spin Møller-Plesset perturbation ... ...

Abstract	The stability of 2D all nitrogen clusters containing from 6 to 96 nitrogen atoms, terminated with CF₃ groups, has been explored using two computational models: dispersion corrected B3LYP functional and scaled opposite spin Møller-Plesset perturbation theory (SOS-MP2). Single point domain-based local pair natural orbital coupled-cluster theory calculations (DLPNO-CCSD(T)) was used for further energy refinement. All systems were found to be minima, and their stability increases with CF₃/N ratio. Larger clusters and anion radicals were not dynamically stable, while some of the cation radicals were found to be minima on potential energy surface. The mechanism of cluster stabilization by CF₃ groups is related with interaction of orbitals holding lone electron pairs and antibonding sigma orbitals.
Keywords	cations ; mathematical theory ; models ; nitrogen ; potential energy
Language	English
Dates of publication	2022-08
Size	p. 217
Publishing place	Springer Berlin Heidelberg
Document type	Article ; Online
ZDB-ID	1284729-X
ISSN	0948-5023 ; 1610-2940
ISSN (online)	0948-5023
ISSN	1610-2940
DOI	10.1007/s00894-022-05216-6
Database	NAL-Catalogue (AGRICOLA)

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Article: Modeling shellfish harvest policies for food safety: Wild oyster harvest restrictions to prevent foodborne Vibrio vulnificus

Alvarez, Sergio / Daniel Solís / Joonghyun Hwang

Food policy. 2019 Feb., v. 83

2019

Abstract: Vibrio vulnificus has been identified as one of the main causative agents of foodborne disease associated with shellfish consumption. Infections of V. vulnificus increase during the summer months due to higher densities of the bacteria in warmer water ... ...

Abstract	Vibrio vulnificus has been identified as one of the main causative agents of foodborne disease associated with shellfish consumption. Infections of V. vulnificus increase during the summer months due to higher densities of the bacteria in warmer water and inappropriate handling of shellfish. In Florida, the daily harvest period is regulated to control the length of time between shellfish harvest and processing, and this harvest period has been recently reduced during the summer months to decrease the risk of foodborne disease. Adoption of this public health policy can affect the profitability and economic sustainability of wild oyster harvesters, especially in resource-dependent coastal communities. This study develops a dynamic and stochastic bioeconomic model to assess the impact of this policy on fishers’ harvest and revenues, and weighs that impact against the policy’s potential public health benefits. Our results show that fishers will experience reduced harvests early in the season due to the shorter harvest hours, but this initial loss is partially recouped later in the season as harvests remain high for longer than they would have if the policy were not in place. This study highlights the relationship between food safety interventions and management of fishery resources, and provides a comprehensive framework for evaluating the costs and benefits associated with such interventions.
Keywords	Vibrio vulnificus ; bacteria ; bioeconomic models ; economic sustainability ; fishery resources ; food pathogens ; food safety ; foodborne illness ; harvest date ; harvesters ; health policy ; income ; oysters ; profitability ; risk reduction ; seafood consumption ; shellfish ; summer ; Florida
Language	English
Dates of publication	2019-02
Size	p. 219-230.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	194840-4
ISSN	0306-9192
ISSN	0306-9192
DOI	10.1016/j.foodpol.2019.01.006
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: In silico modeling: electronic properties of phosphorene monoflakes and biflakes substituted with Al, Si, and S heteroatoms.

de la Garza, Cesar Gabriel Vera / Rodriguez, Luis Daniel Solis / Fomine, Serguei / Vallejo Narváez, Wilmer E

Journal of molecular modeling

2021 Volume 27, Issue 6, Page(s) 171

Abstract: This contribution explores the systematic substitution of phosphorene monoflakes (Mfs) and biflakes (Bfs) with aluminum, silicon, and sulfur. These systems were investigated using density functional theory employing the TPSS exchange-correlation ... ...

Abstract	This contribution explores the systematic substitution of phosphorene monoflakes (Mfs) and biflakes (Bfs) with aluminum, silicon, and sulfur. These systems were investigated using density functional theory employing the TPSS exchange-correlation functional and complete active space self-consistent field (CASSCF) calculations. Al and Si substitution produces significant structural changes in both Mfs and Bfs compared to S-substituted and pristine systems. However, in Mfs, all heteroatoms generate a decrease in band gap and the ionization potentials (IP), and an increase in electron affinity (EA) in comparison with pristine phosphorene. Al doping improves the hole mobility in the phosphorene monoflake, while Si and S substitutions exhibit a similar behavior on EAs and reorganization energies. For Bfs, the presence of Si-Si and Al-P interlaminar interactions causes structural changes and higher binding energies for Si-Bfs and Al-Bfs. Regarding the electronic properties of Bfs, substitution with Si does not produce significant variations in the band gap. Nevertheless, it conduces the formation of hole transport materials, which does not occur in Si-Mfs. The same is observed for Al systems, whereas no correlation was identified between the doping level and reorganization energies for S complexes. The substitution with Al and S leads to an opposite behavior of the band gap and IP values, while the EA variation is similar. In summary, the nature of heteroatom and the doping degree can modify the semiconductor character and electronic properties of phosphorene mono- and biflakes, whose trends are closely related to the atomic properties considered. Overall, these computational calculations provide significant insights into the study of doped phosphorene materials.
Language	English
Publishing date	2021-05-18
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1284729-X
ISSN	0948-5023 ; 1610-2940
ISSN (online)	0948-5023
ISSN	1610-2940
DOI	10.1007/s00894-021-04789-y
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Article ; Online: Novel 2D allotropic forms and nanoflakes of silicon, phosphorus, and germanium: a computational study.

de la Garza, Cesar Gabriel Vera / Narváez, Wilmer Esteban Vallejo / Rodríguez, Luis Daniel Solís / Fomine, Serguei

Journal of molecular modeling

2021 Volume 27, Issue 5, Page(s) 142

Abstract: The structural variability offered by 2D materials is an essential feature in materials design. Despite its significance, obtaining assemblies with suitable stability remains a challenge. In this work, we theoretically explore novel silicon, phosphorus, ... ...

Abstract	The structural variability offered by 2D materials is an essential feature in materials design. Despite its significance, obtaining assemblies with suitable stability remains a challenge. In this work, we theoretically explore novel silicon, phosphorus, and germanium, analogues of haeckelites at hybrid DFT level. Both 2D systems and nanoflakes (NF) have been studied. All materials have been found dynamically stable; Si-, P-, and Ge- analogues of haeckelites were found to be more stable in comparison to the corresponding honeycomb structure than haeckelites in comparison with graphene. All 2D materials showed metallic behavior; however, the difference between inorganic haeckelites and the corresponding honeycomb allotropes is less than that between haeckelites and graphene. Si-, P-, and Ge-, allotropes have much higher electron affinities (EAs) compared to carbon allotropes, while haeckelites have higher EAs than honeycomb structures. Furthermore, Si-, P-, and Ge-structures also exhibit low hopping activation energies for lithium atoms. It makes these materials potentially promising as a component in Li-ion batteries.
Language	English
Publishing date	2021-04-28
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1284729-X
ISSN	0948-5023 ; 1610-2940
ISSN (online)	0948-5023
ISSN	1610-2940
DOI	10.1007/s00894-021-04775-4
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Article ; Online: Complexes of Li, Na, and Mg with 2D allotropies of second and third period: a theoretical study.

Narváez, Wilmer Esteban Vallejo / de la Garza, Cesar Gabriel Vera / Rodríguez, Luis Daniel Solís / Fomine, Serguei

Journal of molecular modeling

2021 Volume 28, Issue 1, Page(s) 22

Abstract: Complexes of Li, Na, and Mg with graphene, silicene, phosphorene nanoflakes (NFs), and their 2D allotropies have been studied at dispersion corrected TPSS/def-TZVP level of theory. The energy partition analysis of the complexes revealed that for most of ... ...

Abstract	Complexes of Li, Na, and Mg with graphene, silicene, phosphorene nanoflakes (NFs), and their 2D allotropies have been studied at dispersion corrected TPSS/def-TZVP level of theory. The energy partition analysis of the complexes revealed that for most of the complexes exchange and correlation energies represent dominant contributions to the binding with strong charge transfer from the metal atom to a NF. The exceptions are Mg complexes of graphene and phosphorene NFs where binding is due to dispersion and correlation terms. This difference is also reflected in large Mg-NF distances suggesting weak intermolecular interactions in these complexes. The calculated activation energies for metal hopping are easily achievable at room temperatures for carbon and silicon allotropies. However, they are significantly higher for phosphorus allotropies reaching almost 18 kcal/mol. Generally, activation energies for hopping increase with binding energies for graphene, silicene, and phosphorene NFs. This trend does not observe however for graphene, silicene, and phosphorene 2D allotropies.
Language	English
Publishing date	2021-12-30
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1284729-X
ISSN	0948-5023 ; 1610-2940
ISSN (online)	0948-5023
ISSN	1610-2940
DOI	10.1007/s00894-021-05019-1
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Article ; Online: Trifluoromethyl-stabilized 2D nitrogen clusters: a theoretical study.

Narváez, Wilmer Esteban Vallejo / de la Garza, Cesar Gabriel Vera / Rodríguez, Luis Daniel Solís / Fomina, Lioudmila / Fomine, Serguei

Journal of molecular modeling

2022 Volume 28, Issue 8, Page(s) 217

Abstract: The stability of 2D all nitrogen clusters containing from 6 to 96 nitrogen atoms, terminated with ... ...

Abstract	The stability of 2D all nitrogen clusters containing from 6 to 96 nitrogen atoms, terminated with CF
Language	English
Publishing date	2022-07-11
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1284729-X
ISSN	0948-5023 ; 1610-2940
ISSN (online)	0948-5023
ISSN	1610-2940
DOI	10.1007/s00894-022-05216-6
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Article ; Online: Electronic structure of hybrid pentaheptite carbon nanoflakes containing boron-nitrogen motifs.

de la Garza, Cesar Gabriel Vera / Narváez, Wilmer Esteban Vallejo / Rodríguez, Luis Daniel Solís / Fomine, Serguei

Journal of molecular modeling

2020 Volume 26, Issue 4, Page(s) 72

Abstract: The electronic structure of isomeric graphene nanoflakes (NFs) heavily doped with boron and nitrogen atoms has been explored. Dispersion-corrected B3LYP functional has been used for the geometry optimizations. A complete active space method has been used ...

Abstract	The electronic structure of isomeric graphene nanoflakes (NFs) heavily doped with boron and nitrogen atoms has been explored. Dispersion-corrected B3LYP functional has been used for the geometry optimizations. A complete active space method has been used for the energy evaluations. Combined boron and nitrogen doping promotes polyradicalic antiferromagnetic ground states in the NFs and affects the nanoflake geometry. There is a charge transfer from boron to nitrogen atoms which increases with the doping level. This transfer does not involve carbon atoms. Combined doping reduces both the ionization potentials (IPs) and the electron affinities (EAs) of the NFs similar to nitrogen doping alone. Boron does not affect either IPs or EAs being neither n- nor p-type dopant for the isomeric graphene NFs. All hybrid NFs show a tendency to increase the band gaps with doping level, which is promoted by the increment of the bond length alternation with doping. Finally, the hole reorganization energies for the NFs were found to be lower than the electronic ones, positioning the hybrid NF as hole-transporting systems. Graphical Abstract Color coded natural charge differences between charged and neutral states. The excess of positive charge is green for cation radicals and the excess of negative charge is red in anion radicals.
Language	English
Publishing date	2020-03-07
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1284729-X
ISSN	0948-5023 ; 1610-2940
ISSN (online)	0948-5023
ISSN	1610-2940
DOI	10.1007/s00894-020-4324-9
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Article ; Online: Characterizing the Severity of SARS-CoV-2 Variants at a Single Pediatric Center

Aslam Khan / Caroline Ichura / Hannah Wang / Izabela Rezende / Malaya K. Sahoo / ChunHong Huang / Daniel Solis / Mamdouh Sibai / Fumiko Yamamoto / Sindiso Nyathi / Bethel Bayrau / Benjamin A. Pinsky / A. Desiree LaBeaud

Frontiers in Medicine, Vol

2022 Volume 9

Abstract: Since March 2020, SARS-CoV-2 has plagued the world with COVID-19 and individuals of all ages have experienced varying symptoms of disease. Older adults were experiencing more severe disease compared to children and were prioritized by vaccination efforts. ...

Abstract	Since March 2020, SARS-CoV-2 has plagued the world with COVID-19 and individuals of all ages have experienced varying symptoms of disease. Older adults were experiencing more severe disease compared to children and were prioritized by vaccination efforts. While biologic therapies and vaccinations were implemented, there were changes in public health restrictions with subsequent surges resulting in more infected children. During these surges there was a rise of different SARS-CoV-2 variants with the dominant variant initially alpha (B.1.1.7 and other Pango lineages) and epsilon (B.1.427/B.1.429) in early 2021 and a dramatic shift to delta (B.1.617.2 and other Pango lineages) by mid-summer 2021. In this study we aimed to characterize the clinical severity and host factors associated with disease by SARS-CoV-2 variant and evaluate if there are differences in disease severity by circulating variant. We retrospectively included all individuals 0–25 years of age who presented to our center and had a positive SARS-CoV-2 RT-PCR, SARS-CoV-2 variant mutation testing, and documented clinical notes from 1 January 2021 through 31 December 2021. We identified 745 individuals who met inclusion criteria and found the delta variant was associated with severe/critical disease compared to the other variants studied. The results of the model showed that underlying respiratory disease and diabetes were risk factors for progression to severe disease. These insights are important when evaluating public health measures and treatment options for children as more variants arise.
Keywords	pediatrics ; SARS-CoV-2 ; COVID-19 ; severity ; variants ; SARS-COV-2 variants ; Medicine (General) ; R5-920
Subject code	610
Language	English
Publishing date	2022-05-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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