Theory Analysis Research Articles

“I felt so powerful to have this love in me”: A grounded theory analysis of the experiences of people living with and recovering from eating disorders while in diverse romantic relationships

Romantic partners have the potential to influence attitudes and behaviors related to body image and disordered eating. However, the role that romantic relationships can play in eating disorder (ED) recovery has not been comprehensively investigated. The present study aimed to explore the ways that people living with and recovering from EDs experience their romantic relationships, with the specific objective of developing a novel theoretical framework, grounded in the experiences of people in diverse romantic relationships, to guide future research on the topic. Semi-structured individual interviews were conducted with 66 people (45 cisgender women, 11 cisgender men, 9 nonbinary people, and 1 transgender man) living with and recovering from EDs while in romantic relationships. Our grounded theory analysis yielded a theoretical model of ED management in romantic relationships, revealing that Individual and Relationship Characteristics intersected with Relationship-Related Stressors and were navigated using Eating Disorder and Relationship Management Strategies. Combined with Partner Support and Tensions, these management strategies were related to Relationship and Mental Health Outcomes, which affected and were affected by Future Concerns. Future researchers should continue to build on, expand, and modify this model and further explore the role of romantic relationships in the experience of people living with EDs.

교사의 다문화교육과정 편성·운영·재구성을 제약하는 사항과 제약의 원인 연구

Objectives This study aims to investigate the types and causes of constraints that elementary, middle, and high school teachers experience while organizing, operating, and restructuring the multicultural curriculum. This study investigated trends of the constraints depending on each teacher’s approach to the multicultural curriculum, the opportunity to develop expertise, and the level of practice. this research analyzed the causes of major constraints by qualitative analysis. Methods Questions to be surveyed were developed based on the implications derived from the analysis of prior theories and previous studies. Afterward, a survey was conducted on 316 elementary, middle, and high school teachers for analysis. And then Written interviews were conducted with 11 teachers to examine the causes of the survey results. Results Regarding the first research question, the highest rate of responses was that all schools experienced re-strictions that limited other cultures to Korean style. And restrictions were different depending on the school level. Regarding the second research question, And restrictions were different depending on the teacher’s approach to the multicultural curriculum. Multicultural education experience and related work experience showed a positive correlation with the Education Support Office's guidelines. There was a negative correlation between the training time of the multicultural curriculum and the restriction that limited other cultures to the Korean style. About the third research question, it was examined that the constraints stemmed from school structural and contextual causes, respectively. Conclusions Through this study, first, it is necessary to provide training specialized in the multicultural curriculum but provide incentives for teachers to actively participate and provide practical content, practice cases, and teach-ing and learning materials to make the training more beneficial. Second, it was suggested that an institutional de-vice that can reflect the multicultural curriculum in the school education evaluation plan is needed.

Understanding the important characteristics of neighbourhoods to facilitate ageing in place and longevity.

This study investigates which local area characteristics, included in the Healthy Ageing/Vulnerable ENvironment (HAVEN) Index, are the strongest factors predicting transition into permanent residential aged care (PRAC) and mortality, and the geographic distribution of these factors. A retrospective cohort study of older individuals living in the community in Adelaide who received their first eligibility assessment for age care services between 2013 and 2015 (n = 16,939) was conducted. The study cohort, from the Registry of Senior Australians (ROSA), was linked by postcode to HAVEN Index items, selected following item response theory (IRT) analysis to determine the strongest local area factors associated with PRAC and mortality. Geospatial mapping of the factors determined the geographic distribution of these significant factors. Fourteen HAVEN Index items were associated with entry into PRAC and mortality. Three area-level items, lower educational attainment, financial housing stress and low levels of volunteering by older people, were risk factors for entry into PRAC and mortality while the remainder of the items identified were different for each outcome. The mapped local area risk factors for each outcome highlighted similar geographical areas of vulnerability. Local area characteristics are associated with entering PRAC and mortality. Our findings can inform area-level responses to make neighbourhoods more age-friendly, potentially allowing more people to age longer in place. Similar analyses, conducted for other areas, could provide evidence to support the widespread development of age-friendly neighbourhoods reducing area-level inequalities in ageing.

Multifunctional terahertz device based on plasmon-induced transparency

Abstract Enhancing light-matter interaction is crucial in optics for boosting nanophotonic device performance, which can be achieved via plasmon-induced transparency (PIT). In this study, a polarization-insensitive PIT effect at terahertz frequencies is achieved using a novel metasurface composed of a cross-shaped graphene structure surrounded by four graphene strips. The high symmetry of this metasurface ensures its insensitivity to changes in the polarization angle of incident light. The PIT effect, stemming from the coupling of graphene bright modes, was explored through finite difference time domain (FDTD) simulations and coupled mode theory (CMT) analysis. By tuning the Fermi level in graphene, we effectively modulated the PIT transparent window, achieving high-performance optical switching with a modulation depth (88.9% < MD < 98.0%) and insertion losses (0.17 dB < IL < 0.51 dB) at a carrier mobility of 2 m2/(V·s). Furthermore, the impact of graphene carrier mobility on the slow-light effect was examined, revealing that increasing the carrier mobility from 0.5 m2/(V·s) to 3 m2/(V·s) boosts the group index from 126 to 781. These findings highlight the potential for developing versatile terahertz devices, such as optical switches and slow-light apparatus.

Dispersion-driven cooperativity in alkyl perylenediimide oligomers: insights from densityfunctional theory.

The cooperative mechanism is of paramount importance in the synthesis of supramolecular polymers with desired characteristics, including molecular mass, polydispersity, and morphology. It is primarily driven by the presence of intermolecular interactions, which encompass strong hydrogen bonding, metal-ligand interactions, and dipole-dipole interactions. In this study, we utilize density functional theory and energy decomposition analysis to investigate the cooperative behavior of perylene diimide (PDI) oligomers with alkyl chains at their imide positions, which lack the previously mentioned interactions. Our systematic examination reveals that dispersion interactions originating from the alkyl side-chain substituents play an important role in promoting cooperativity within these PDIs. This influence becomes even more pronounced for alkyl chain lengths beyond hexyl groups. The energy decomposition analysis reveals that the delicate balance between dispersion energy and Pauli repulsion energy is the key driver of cooperative behavior in PDIs. Additionally, we have developed a mathematical model capable of predicting the saturated binding energies for PDI oligomers of varying sizes and alkyl chain lengths. Overall, our findings emphasize the previously undervalued significance of dispersion forces in cooperative supramolecular polymerization, enhancing our overall understanding of the cooperative mechanism.

Quantitive HAZOP and D-S evidence theory-fault tree analysis approach to predict fire and explosion risk in inert gas system on-board tanker ship

Tanker ships carry volatile cargo, presenting inherent risks of fire and explosion. Inert gas systems (IGS) are pivotal in mitigating risks by displacing oxygen in cargo tanks. However, failure of IGS components may lead to fatal consequences such as loss of life and marine pollution. This paper prompts a systematic approach integrating Quantitative Hazard and Operability (HAZOP) analysis under D-S (Dempster–Shafer) evidence theory and Fault Tree Analysis (FTA) to predict and quantify the fire and explosion risk associated with IGS malfunction on tanker ships. The methodology systematically evaluates failure probabilities, and consequences using HAZOP to identify critical scenarios. D-S evidence theory is employed to address uncertainties and incorporate expert knowledge into the analysis. FTA is applied to model fault propagation and assesses the likelihood of fire and explosion events based on the identified failure scenarios. A case study is presented to demonstrate the application of the proposed methodology, illustrating effectiveness in identifying high-risk scenarios and providing insights for enhancing operational safety minimising the risk of IGS on tanker ships. The findings show that the risk of fire and explosion in the inert gas system due to the high concentration of oxygen entering the tank was found to be 2.86E-01. Besides its robust theoretical background, the findings of the paper provide the utmost contribution to ship crew, ship inspectors, HSEQ managers and safety professionals for proactive risk mitigation strategies, contributing to the advancement of safety management practices in the maritime industry.

The Wrongful Arrest Theory: Justice For Individuals With Diabetes In Criminal Law Procedure

This paper discusses the vulnerability of diabetic individuals when they are subjected to arrest procedures in criminal law. It analyzes the wrongful arrest theory as a device for individuals with disabilities to bring claims against law enforcement when their rights under Title II of the Americans with Disabilities Act (ADA) are violated. Individuals with diabetes constitute more than 10% of the United States population, meaning that many individuals are at risk for police misconduct because of their disability. The symptoms that come about with having diabetes, such as fruity-smelling breath and loss of coordination, can be mistaken for illegal activity leading to a wrongful arrest. No case involving ADA Title II violation claims against law enforcement relying on the wrongful arrest theory has been brought by an individual with diabetes. This paper explores the possibility of its potential success. To accomplish this, this paper first defines disability under the law, including diabetes. It then conducts a thorough analysis of the wrongful arrest theory in various case studies consisting of non-diabetic and diabetic plaintiffs. In a final case study, I apply the wrongful arrest theory to a case hypothetically to illustrate the plaintiff's potential success if he claims a wrongful arrest. Lastly, I explore some of the theory’s limitations and propose a potential solution. I hope that my findings will emphasize the lack of discourse surrounding individuals with diabetes in disability law and encourage further research and education on the wrongful arrest theory as a successful claim against Title II violations committed by law enforcement.

Unidentified Anomalous Phenomena (UAP) Disclosure as Ontological Shock? Exploring Diversity Among Social Media Responses to a Congressional UAP Hearing

The topic of “Unidentified Anomalous Phenomena” (UAP) has risen to increasing prominence recently, as exemplified by the Congressional UAP hearing in July 2023. Indeed, some observers interpreted the event as “disclosure” – a process by which authorities, long suspected to have withheld evidence that some UAP are genuinely anomalous (e.g., extraterrestrial), admit this to the public. Whether it actually constituted disclosure is another issue, but it was certainly experienced by some as such. The significance of such disclosure is that some commentators suggested it may precipitate “ontological shock” (a person having their fundamental sense of reality challenged in some way). Whether the hearing did indeed do so is the research question animating this paper, which presents an exploratory, preliminary examination of reactions to the hearing on X (previously Twitter). A Grounded Theory analysis identified 19 themes (involving 76 subthemes), distributed across four categories: concern; positive reactions; skepticism and indifference; and critical engagement. Evidently, even if this event constituted disclosure and/or ontological shock for some people, there were diverse reactions, and collectively the effect was more one of ontological “fracturing.” The paper highlights the complexity of this topic and the need for further research.

Evangelical Christians score higher than non-evangelicals on public, but not on private, commitments to morality

ABSTRACT Are distinctly elevated, external, public commitments and displays of morality accompanied by distinctly elevated internal, private commitments to morality? A nationally representative U.S. dataset was used to help answer this question. Evangelical Christians (N = 411) scored higher than non-evangelicals (N = 942) on a measure of commitment to external, public displays of morality. However, the group differences in scores on a measure of internal, private commitments to morality were much smaller and were not statistically significant. Item response theory analyses indicated no measurement bias for the two groups, suggesting that the observed group difference and similarity on the measures of public and private morality commitments were real. Public and private commitments to morality are potentially independent at both the individual and group levels.

Portfolio Validity Test in the Chinese Market

Modern portfolio theory is one of the most classic theories in financial investment theory. It was first released by a famous economist, Markowitz. As the most important critical model in investment science, it provides investors with scientific investment allocation methods, which are favored by many investors. It has been widely used and researched in the world. Modern portfolio theory analyses the historical returns of investment objects and guides future investment behavior. However, it is still controversial whether this theory is reasonable and adequate in Chinas stock market. China's stock market is more susceptible to fluctuations than those in Europe and the US, and many of these factors stem from China's strategic policies in various areas. Since the end of the epidemic, China's economic development has also slowed down. In this context, this paper will construct the maximum Sharpe ratio strategy, market capitalization strategy, and average weight strategy. Through the performance evaluation indexes of these three strategies' performance comparison, this paper will verify whether the portfolio strategy is real and effective in China's stock market and can bring more than significant market returns to investors.

Relationships between Serotonin Transporter Availability and the Global Efficiency of the Executive Control Brain Network

The diverse effects of serotonin on cognition may emerge from the modulation of large-scale brain networks that support distinct cognitive processes. Yet, the specific effect of serotoninergic modulation on the properties of these networks remains elusive. Here, we used a simultaneous PET-fMRI scanner combined with graph theory analyses to investigate the modulation of network properties by the Serotonin Transporter (SERT) availability measured in the dorsal raphe nucleus (DRN). We defined global efficiency as the average mean of efficiencies over all pairs of distinct nodes of specific brain networks, and determined whether SERT levels correlated with the global efficiency of each network. SERT availability in the DRN correlated negatively with the global efficiency of the executive control brain network, which is engaged in cognitive control and directed attention. No relationship was observed between SERT availability and the global efficiency of the default mode or the salience brain networks. These findings indicate a specific role of serotoninergic modulation in the executive control brain network via a change in its global efficiency.

Tailoring the extension-bending-twisting coupling in composite laminates using carbon nanotube hybridization

Abstract The existence of extension-bend-twist (EBT) coupling of deformations in composites is a complex problem. Ability to tailor the coupling response as per the requirement is desirable to harness the high strength-to-weight ratio of composites in many structural applications. Here we report a feasible design strategy to tune the extent of deformation coupling in composite laminates. To this end, carbon nanotube (CNT) grafted lamina is incorporated in the lay-up of conventional composites. Classical laminate theory (CLT) and finite element (FE) analysis show that the coupling extent of extension-twist, extension-bending and extension-bending-twist can be suitably designed by varying the number, location and distribution of CNT grafted lamina in a laminate configuration. Theoretical and computational results reveal maximum extension-twist coupling when a single CNT grafted lamina is placed closer to the mid-plane in a 16 ply antisymmetric laminate. Symmetrical placement of CNT grafted lamina avoids the extension-bend coupling. FE analysis shows that the lateral bending of composite cantilever beam under combined axial and bending loads can be designed by suitably choosing the configuration of the modified laminate. These findings will significantly contribute in designing structural composites for advanced applications.

SPILLOVER EFFECTS OF COVID-19 ON USA EDUCATION GROUP STOCKS

In this paper, we explore the price dynamics of 16 representative records of USA Education Group stocks, encompassing two non-overlapping periods (before, during, and after COVID-19). Based on information theory and cluster analysis techniques, our study provides insights into disorder, predictability, efficiency, similarity, and resilience/weakness, considering the most diverse financial stakeholders. Our findings contribute significantly to understanding price dynamics in the education sector, encompassing non-crisis and crisis periods, and provide valuable information for financial risk management, highlighting the importance of considering financial assets’ efficiency and resilience/weakness during economic turbulence, such as the COVID-19 crisis.

Социально-философское осмысление проблем этноса и этнической идентичности в отечественной науке ХХ в.

This article delves into the nuanced discourse surrounding ethnicity and ethnic identity in the Russian science of the XX century. It critically examines the works of prominent scholars such as S.M. Shirokogorov, shedding light on the multifaceted nature of ethnicity and its implications for cultural diversity. The study also scrutinizes the methodological approaches of Soviet-era researchers, particularly their tendency to conflate ethnicity with nationality. Furthermore, it offers a comparative analysis of ethnological theories put forth by notable figures including M.I. Artamonov, Yu.V. Bromley, L.N. Gumilev, and S.M. Shirokogorov. By delineating the distinctions between ethnicity and nationality, the research underscores the significance of factors such as haplogroups, genetic studies, language, and mythological narratives in elucidating the unique cultural identities of various ethnic groups. In conclusion, by exploring diverse perspectives and methodologies, the research enriches our comprehension of the complexities surrounding ethnic identity in Russian scientific thought. Moreover, it emphasizes the role of interdisciplinary approaches in elucidating the intricate interplay between genetics, culture, and historical narratives in shaping ethnic identities. This nuanced understanding is crucial for fostering mutual respect and appreciation for cultural diversity in modern society.

Bio-based composite from chitosan waste and clay for effective removal of Congo red dye from contaminated water: Experimental studies and theoretical insights

Water pollution due to dyes in the textile industry is a serious environmental problem. During the finishing stage, Congo red (CR) dye, water-soluble, is released into wastewater, polluting the water body. This study explores the effectiveness of utilizing a composite composed of Safi raw clay and chitosan to remove an anionic dye from synthetic wastewater. The chitosan was extracted from crab shells. Its removal performance was compared to that of natural clay. Both the composite and raw clay were used to remove target pollutant. The effects of the chitosan load in the composite, size particles, initial dye concentration, contact time, pH, and temperature on the dye's elimination were tested in batch modes. The composite with 30% (w/w) of chitosan exhibited the highest dye removal. At pH 2, an adsorption capacity of 84.74 mg/g was achieved, indicating that the grafting of the polymer onto clay surface enhances its efficacity and stability in acidic environments. This finding was supported by characterization data obtained from X-ray diffraction (XRD), scanning electron microscopy (SEM), dispersive X-ray spectroscopy (EDX), and Fourier transform infrared (FT-IR) analyses. Under optimized conditions of 20 mg dose, pH 2, 30 min of reaction time, and 20 mg/L of dye concentration, about 92% of dye removal was achieved. The Langmuir isotherm model represents dye adsorption by the composite, while dye removal was controlled by pseudo-second-order model. Thermodynamic data of the adsorption (ΔH = +8.82 kJ/mol; ΔG <0) suggested that the dye adsorption was spontaneous and endothermic. The findings provide insights into the dye elimination by the adsorbent, indicating that the removal occurred via attractive colombic forces, as confirmed by density functional theory (DFT) analysis. Overall, the composite of natural clays and chitosan waste is a promising and innovative adsorbent for treating wastewater containing recalcitrant dyes.

The WOUND-Q Function and Symptoms Scales for Chronic Lower Extremity Wounds: A Validation study.

Determine the validity and reliability of the LIMB-Q scales, Function and Symptoms, in patients with chronic lower extremity wounds. Cognitive debriefing interviews with people with current or previous wounds were conducted to examine content validity. Scales were field-tested in an international sample of people with chronic lower extremity wounds sourced from an online platform (i.e., Prolific). Psychometric properties were examined using Rasch Measurement Theory analysis. A test-retest reproducibility study was performed, and construct validity examined. Content validity was established after 10 cognitive interviews. A total of 233 people with lower extremity wounds (age 19-80 years, mean 39.3) participated in the field-test. All 25 items tested demonstrated good fit to the Rasch model with ordered thresholds. One item had a fit residual outside ± 2.5, but no items had significant χ2 values after Bonferroni adjustment. Reliability was high with Person Separation Index, Cronbach alpha, and intraclass correlation coefficients values >0.8. Strong correlations were found between the Function and Symptoms scales and EQ-5D dimensions measuring similar constructs as well as the EQ-5D global score. All hypothesis for construct validity were confirmed. PROMs are an important component of patient-centered care, as they capture the patient's perspective in a rigorous and reproducible way. Adding these two scales to the WOUND-Q provides a means to measure function and symptoms associated with lower extremity wounds. These new WOUND-Q scales can be used to measure outcomes important to patients with lower extremity wounds in clinical settings and research studies.

In/visible hurdles: US collegiate esports participants’ perceived barriers to play and involvement

Gaming and esports communities possess cultural barriers that exclude potential participants, limiting their access to social, cultural, and economic opportunities. In the United States, for instance, varsity esports players are increasingly supported by scholarships and tournament prizes, but persistent challenges make these benefits accessible to only a limited portion of the student body. Using a grounded theory analysis of 31 in-depth interviews with collegiate esports players, administrators, and student workers, this study examines perceived barriers and their (in)visibility to different participants. We find that gender and race are readily acknowledged, while other identities (age, physical ability, etc.) are overlooked. Moreover, visibility did not necessarily correlate with meaningful strategies for inclusion. While collegiate esports could be a welcoming and equitable environment, these findings suggest it will not be so until all hurdles are (1) made visible and (2) addressed relative to a university’s own student body composition.

Analysis of nonlinear bending behavior of nano-switches considering surface effects

Nano-switch structures are important control elements in nanoelectromechanical systems and have potential applications in future nanodevices. This paper analyzes the effects of surface effects, geometric nonlinearity, electrostatic forces, and intermolecular forces on the nonlinear bending behavior and adhesion stability of nano-switches. Based on the Von Karman geometric nonlinearity theory, four types of boundary conditions for the nano-switch structure were specifically calculated. The results show that surface effects have a significant impact on the nonlinear bending and adhesion stability of nano-switches. Surface effects increase the adhesion voltage of the nano-switch and decrease its adhesion displacement, and as the size of the nano-switch structure increases, the impact of surface effects decreases. A comparative analysis of the linear theory and the nonlinear theory results shows that the adhesion voltage predicted by the linear theory is smaller than that predicted by the nonlinear theory. The effect of geometric nonlinearity increases as the size of the nano-switch structure increases, as the distance between the electrodes increases, and as the aspect ratio of the nano-switch structure increases. These findings provide theoretical support and reference for the design and use of future nanodevices and nanoelectromechanical systems.

Exploring the inhibitory action of betulinic acid on key digestive enzymes linked to diabetes via in vitro and computational models: approaches to anti-diabetic mechanisms

ABSTRACT Phytochemicals are now increasingly exploited as remedial agents for the management of diabetes due to side effects attributable to commercial antidiabetic agents. This study investigated the structural and molecular mechanisms by which betulinic acid exhibits its antidiabetic effect via in vitro and computational techniques. In vitro antidiabetic potential was analysed via on α-amylase, α-glucosidase, pancreatic lipase and α-chymotrypsin inhibitory assays. Its structural and molecular inhibitory mechanisms were investigated using Density Functional Theory (DFT) analysis, molecular docking and molecular dynamics (MD) simulation. Betulinic acid significantly (p < 0.05) inhibited α-amylase, α-glucosidase, pancreatic lipase and α-chymotrypsin enzymes with IC50 of 70.02 μg/mL, 0.27 μg/mL, 1.70 μg/mL and 8.44 μg/mL, respectively. According to DFT studies, betulinic acid possesses similar reaction in gaseous phase and water due to close values observed for highest occupied molecular orbital (HOMO) and lowest occupied molecular orbital (LUMO) and the chemical descriptors. The dipole moment indicates that betulinic acid has high polarity. Molecular electrostatic potential surface revealed the electrophilic and nucleophilic attack-prone atoms of the molecule. Molecular dynamic studies revealed a stable complex between betulinic acid and α-amylase, α-glucosidase, pancreatic lipase and α-chymotrypsin. The study elucidated the potent antidiabetic properties of betulinic acid by revealing its conformational inhibitory mode of action on enzymes involved in the onset of diabetes.

Mathematical Physics Analysis of Nozzle Shaping at the Gas Outlet from the Aperture to the Differentially Pumped Chamber in Environmental Scanning Electron Microscopy (ESEM).

A combination of experimental measurement preparations using pressure and temperature sensors in conjunction with the theory of one-dimensional isentropic flow and mathematical physics analyses is presented as a tool for analysis in this paper. Furthermore, the subsequent development of a nozzle for use in environmental electron microscopy between the specimen chamber and the differentially pumped chamber is described. Based on experimental measurements, an analysis of the impact of the nozzle shaping located behind the aperture on the character of the supersonic flow and the resulting dispersion of the electron beam passing through the differential pumped chamber is carried out on the determined pressure ratio using a combination of theory and mathematical physics analyses. The results show that nozzle shapes causing under-expanded gas outflow from the aperture to the nozzle have a worse impact on the dispersion of the primary electron beam. This is due to the flow velocity control. The controlled reduction in the static pressure curve on the primary electron beam path thus causes a significantly higher course of electron dispersion values than variants with shapes causing over-expanded gas outflow.