Concrete Support Research Articles

Intercultural education and mother tongues of immigrant children: The case of Slovenia

PURPOSE. Intercultural education has become an important topic and one of the priorities for schools and education systems worldwide. Teachers should acquire knowledge about inclusion and intercultural education during their university education, but despite evidence that principals, teachers and schools feel ill-equipped to teach and engage in intercultural education, it in many countries, including Slovenia, this is not the case. For this reason in this paper, we present an intercultural model of education that offers teachers concrete support in the inclusion of migrant children. APPROACH. In addition to the comprehensive model of intercultural education, the article also presents some changes in legislation based on an analysis of educational regulations on inclusion and the development of intercultural education in Slovenia in recent years, which have a direct impact on the inclusion of immigrant pupils and students. The article also points out that teaching of mother tongues and cultures lessons for immigrant children is a very important part of intercultural education. Mother tongue and culture lessons in schools can be an opportunity to develop intercultural dialogue, and intercultural competence of all students, teachers and parents. Figures in Slovenia show that the number of schools offering mother tongues and cultures for children with a migrant background is slowly growing, but there are fewer languages to choose from. FINDINGS. Teachers do not feel competent in the area of inclusion of migrant students, intercultural education and teaching in culturally and linguistically diverse classrooms. This article therefore presents an intercultural model of education that offers teachers concrete support and actively involves all stakeholders in the integration process: Teachers, students, parents, migrants and their organizations, and local communities. KEY MESSAGE. As classrooms are becoming more culturally and linguistically diverse as a result of migration, systemic solutions and a holistic approach are needed to integrate immigrant pupils into the education system. The article focuses on the case of Slovenia, but the proposed holistic model is also transferable to other national contexts.

Reevaluating student-centred education: uncovering learning difficulties stemming from empiricist epistemological assumptions

ABSTRACT This paper demonstrates that recurrent difficulties students encounter in learning subject-matter knowledge can be traced, in part, to assumptions about how students best learn knowledge that significantly shape instructional approaches. First, I review the significant influence of empiricist epistemological assumptions on education, covering student-centred pedagogical principles and instructional methods applied in progressive, constructivist, and conventional education. Empiricist epistemological assumptions presume that students learn best by relying primarily on and directly building upon their existing knowledge, experiences, and reasoning, particularly those familiar from everyday life. These assumptions have shaped pedagogical principles and methods such as relying on students' preinstructional knowledge and reasoning, concrete experiences, direct observations, or concrete visual images for learning. Next, I review evidence that empiricist-informed instructional applications often induce learning difficulties, such as erroneous inferences stemming from students' preinstructional knowledge, difficulty understanding content that diverges from students' prior knowledge, and confusion between concrete supports and abstract concepts. By tracing these difficulties to empiricist epistemological assumptions, this paper employs a genealogical epistemological analysis, which tracks the influence of epistemological assumptions on education across several levels, from pedagogical principles to instructional methods, down to students' learning. This analysis (a) explains the roots of certain learning difficulties and aids in anticipating them, (b) challenges pedagogical approaches by questioning their epistemological foundations, and (c) examines how the influence of problematic assumptions is connected to alignment with internationally promoted educational purposes. The influence of epistemological assumptions on education is significant yet understudied. Thus, the genealogical epistemological analysis proves crucial to critically analyze education.

Google search and cross-section of cryptocurrency returns and trading activities

This paper examines the effect of investor attention on the cross-section of cryptocurrency returns and trading activities. We find that cryptocurrencies associated with higher abnormal Google search volume subsequently exhibit higher returns, higher volatility, and higher trading volume. The results are robust to alternative sample periods and alternative search keywords, providing concrete support to the attention-induced price pressure hypothesis and consistent with prior studies on the equity market. The effect is more pronounced among larger cryptocurrencies. Only a partial reversal after the initial return increase is observed, implying that investor attention permanently impacts cryptocurrency prices.

Waste From Alwar Quartzite (A Global Heritage Stone From Rajasthan - India) As Secondary Raw Materials for Cementitious Tile Adhesives

Waste deriving from quarrying operations of natural stone material retains almost all the mineralogical and compositional characteristics of the original material, for such reason this research aimed to test prototypes cementitious tile adhesives made up recycling the Alwar Quartzite waste, used as fine and ultra-fine aggregate. Particle size distribution analysis, along with X-ray diffractometry, X-ray fluorescence and Scanning Electron Microscopy were carried out to characterize the waste. Experimental research involved the mix-designing of three dough formulations (a regular one [N], a latex added [L] and a fast-setting [R]) tested by using different types of tiles: (i) polished metal plates, (ii) ceramic tiles and (iii) rough natural stone slabs. Fresh prepared doughs were firstly tested for thixotropy achieving high values (ranging 82–93%) and cured for normative requested time after being stuck on a concrete support as reported in European UNI standard regulations. After respective curing time, adhesives technical performances were evaluated by the Pull-Off test obtaining results for Class 1 (N and R) and Class 2 (L) adhesives with high initial tensile adhesive strength. Experimental results carried out in this research proved the possibility to use huge amounts of waste coming from Indian stone industry in cementitious tile adhesives sector without compromising technical performances, proposing itself as an alternative method to landfill disposal for this waste.

Long-term evolutionary links between the isolated neutron star populations

ABSTRACT We have investigated the evolutionary connections of the isolated neutron star (NS) populations including radio pulsars (RPs), anomalous X-ray pulsars (AXPs), soft gamma repeaters (SGRs), dim isolated NSs (XDINs), ‘high-magnetic field’ RPs (‘HBRPs’), central compact objects (CCOs), rotating radio transients (RRATs), and long-period pulsars (LPPs) in the fallback disc model. The model can reproduce these NS families as a natural outcome of different initial conditions (initial period, disc mass, and dipole moment, μ) with a continuous μ distribution in the $\sim 10^{27} - 5 \times 10^{30}$ G cm$^3$ range. Results of our simulations can be summarized as follows: (1) A fraction of ‘HBRPs’ with relatively high μ evolve into the persistent AXP/SGR properties, and subsequently become LPPs. (2) Persistent AXP/SGRs do not have evolutionary links with CCOs, XDINs, and RRATs. (3) For a wide range of μ, most RRATs evolve passing through RP or ‘HBRP’ properties during their early evolutionary phases. (4) A fraction of RRATs which have the highest estimated birth rate seem to be the progenitors of XDINs. (5) LPPs, whose existence was predicted by the fallback disc model, are the sources evolving in the late stage of evolution before the discs become inactive. These results provide concrete support to the ideas proposing evolutionary connections between the NS families to account for the ‘birth rate problem’, the discrepancy between the cumulative birth rate estimated for these systems and the core-collapse supernova rate.

Effects of degraded durability on the long-term stability of in-service slopes with reinforced concreted support structures

Engineering slope stability issues typically exhibit the impact of deteriorating durability on the susceptibility of slopes to failure. A thorough investigation was essential to explore theoretical and experimental aspects of slope durability degradation and its implications on long-term stability. Hence, a durability model was developed to accommodate slope stabilization using reinforced concrete (RC) support structures. This model was grounded in classical durability principles for RC structures. Subsequently, a model test was conducted to compare the responses of a standard slope model with a weakened counterpart subjected to environmental impacts. According to the proposed methodology for slope durability and stability, a case study involving future durability and stability predictions was performed. It was found that the theoretical solutions for the carbonation or neutralization (CN) velocity, depth, and penetration time agreed well with model test results. The slope surface displacements of the weakened slope with deteriorating coefficients between 0.6 and 0.9 were 4 to 8 times those of the standard slope, demonstrating significant degradation in stability. The case study indicated a steady reduction in the safety factor, at a rate of 2.3 to 2.4‰ per year throughout the slope’s service life. Finite-element-based predictions also suggested the potential for corrosion of slope anchor bolts within 20 years and breakage within 30 years, at an average rate of 7.5‰ per year in the ultimate bearing capacity. These findings highlight the need for timely maintenance and reinforcement interventions to ensure the long-term durability of operational slopes.

Originalarbeiten / Original Articles. Prävention sexualisierter Gewalt an Kindern und Jugendlichen: Präventionsmaßnahmen und Schutzkonzepte in den Bereichen Sport, Musik und Kirche

Prevention of Child Sexual Abuse: Prevention Programs and Safeguarding Concepts in the Context of Sports, Musical Education, and Religious Organizations Prevalence rates of child sexual abuse by caregivers in private and non-public institutions underscore the need for implementing safeguarding concepts. However, factors driving the implementation of prevention and safeguarding in the field are not well understood. What supportive and inhibiting factors can be identified in the implementation of safeguarding concepts and prevention programs? Content analysis of semi-structured interviews with professional and volunteer staff in clubs and institutions (n = 10, 69 % female) as well as with individuals who experienced child sexual abuse during their childhood (n = 3, 66 % female). Safeguarding concepts in clubs or religious institutions were primarily initiated by umbrella organizations. Current incidents of child maltreatment, public pressure, and media attention substantially increased the need for preventive actions. The provision of training, resources, and networking structures by umbrella organizations further facilitated their implementation. Main implementation challenges included limited personnel and time resources, lack of expertise, insufficient training opportunities, and absence of guidelines and support from umbrella organizations. Due to club leaders' limited knowledge and resources an independent implementation of safeguarding concepts is largely lacking without concrete guidelines and support from umbrella organizations. To upscale safeguarding, public policies or incentive systems such as state-funded child protection certifications are thus paramount.

Optimisation of Parameters and Application of Green Recyclable Precast Hollow Steel Pipe Concrete Supports

Underground space development is a crucial approach to addressing traffic congestion in China’s cities, especially through underground construction. However, the traditional pit internal support system, particularly the concrete internal support system, has significant drawbacks. These include high energy consumption and carbon emissions, which are increasingly prominent issues. In this paper, a hollow precast concrete-filled steel tube (H-CFST) internal support system is proposed and a node connection scheme is designed. Through numerical simulation, the load-bearing characteristics of H-CFST with different aspect ratios, hollow ratios, hoop thicknesses, and hoop lengths are investigated, and the optimal design parameters are obtained. Finally, following a field application, monitoring data reveal that the precast H-CFST internal support demonstrates superior load-bearing capacity compared to the concrete internal support, successfully meeting the criteria for replacement of the concrete support.

Complex Dispersion Analysis of Flexural Wave Propagation in Periodic Track Structure

The periodic characteristics of the track structure have filtering characteristics for the propagation of vibration waves within it, and the dispersion analysis is of great significance to understand the vibration transmission characteristics of the track structure. The accuracy of the traditional virtual spring method depends on the value of spring stiffness, which leads to poor stability. Therefore, this paper adopts a null space method with both stability, accuracy and efficiency, and takes the CRTSIII ballastless track structure as the research object. Based on the null space method and energy functional variational principle, the damping factor and the material frequency variation effect are considered in detail, and the complex frequency dispersion of the CRTSIII ballastless track structure is analyzed. The accuracy of the proposed method is verified by comparing it with the results of the existing literature, and the influence of fastener stiffness frequency variation, fastener damping and concrete support layer damping on the complex dispersion characteristics of vibration waves of track structures is analyzed by using this method. The results show that the stiffness frequency effect, fastener damping and concrete support layer damping have a great influence on the attenuation domain and attenuation rate of vibration, which must be considered in the vibration transmission analysis of track structures.

A Critical View on the Recommendation of Ribs of Reinforced Sprayed Concrete Support in the Q-System

A Critical View on the Recommendation of Ribs of Reinforced Sprayed Concrete Support in the Q-System

Manufacturing concern: Inside Richard Nixon’s “law and order” campaign

With a view to contributing to an in-depth understanding of political engagement with public opinion about crime or cognate issues in the United States, this article dissects how Richard Nixon and his inner circle dealt with citizens’ views on what he collectively termed “law and order,” both during his 1968 presidential campaign and his first term in office. Based on novel data from heretofore unused or otherwise underused archival sources, the article lends concrete support to a notion which prior works have asserted without sufficient evidence, dismissed as a conspiracy theory, or, more recently, attempted to revise; namely, that Nixon’s “law and order” messaging was meant to manipulate the public so as to reap electoral dividends for him. In the process of so doing, the article investigates a series of previously understudied themes and the ways in which they intersect: Whose views exactly did Nixon try to shape to his advantage? Which strategy did he follow and what precise means did he use? And how effective were his efforts? It is shown that Nixon targeted both the white majority at large and discrete sections of it: his conservative base, disaffected Democrats, and blue-collar immigrants from Europe who lived around black urban ghettos. With each and every one of his target groups, Nixon engaged in an effort to manufacture concern over “law and order,” itself an assemblage of issues through which he hoped to improve his leadership image in a dual sense: strength of purpose and attentiveness to public will. Unlike what is commonly assumed, Nixon’s “law and order” ploys were limited in their success.

“I will take part in the revolution with our people”: a qualitative study of healthcare workers’ experiences of violence and resistance after the 2021 Myanmar coup d’etat

BackgroundIn Myanmar, ongoing conflict since the 2021 military coup d’etat has been characterized by targeted violence against health workers (HWs), particularly those participating in the pro-democracy movement. Existing knowledge about the challenges faced by health workers in Myanmar is scant, including their perspectives on mitigating their suffering and the broader impact on community health. This knowledge gap prompted our study to assess the extent of the violence, its impact on the workers and the community, and identify resource priorities.MethodsThis qualitative study employed purposive and snowball sampling to recruit health workers affiliated with the Civil Disobedience Movement (CDM). We interviewed 24 HWs in Myanmar between July and December 2022, predominantly physicians and nurses. We used a semi-structured interview guide and conducted interviews remotely due to the security situation. We adopted content analysis to understand participation in the CDM movement, experiences of violence, personal and professional impacts, the sequelae to community health, how HWs responded as well as their ongoing needs.ResultsThematic content analysis revealed that violence was both individually targeted and widespread. Health workers faced professional, financial, and personal impacts as a result. The health system as a whole has been severely diminished. Health workers have had to adapt to continue to provide care, for example some fled to rural areas and worked clandestinely, exchanging their services for food and shelter. In those settings, they continued to face insecurity from airstrikes and arrests. Health workers have also experienced moral distress and burden due to their resistance and protest against the regime.ConclusionThe coup and ensuing violence severely disrupted the healthcare system, resulting in shortages of supplies, reduced quality of care, and exacerbated challenges during the COVID-19 pandemic. Despite facing significant hardships, HWs remained resilient, engaging in resistance efforts within the CDM and seeking support from local communities and international organizations. They expressed a need for increased awareness, financial assistance, and concrete support for the health system to address the crisis.

Understanding the Experiences and Support Needs of Close Relatives in Psychiatric Euthanasia Trajectories: A Qualitative Exploration.

In Belgium, adults with psychiatric disorders can opt for euthanasia under strict conditions. The impact of these euthanasia trajectories on close relatives remains insufficiently studied. This research is the first in Belgium to explore the concrete experiences and support needs of relatives involved in psychiatric-based euthanasia trajectories by means of an in-depth interview study. The interviews with 18 relatives were conducted from March to May 2023 and analyzed using inductive thematic coding. The results reveal the complex and ambivalent emotional and cognitive experiences among relatives. Experiences with euthanasia trajectories varied from positive to negative, marked by shared feelings of surrealism and unreality. This included the farewell process that relatives go through, regardless of whether euthanasia was carried out. While the desired level of involvement varied, everyone sought some degree of recognition and understanding for their complex position during the euthanasia procedure, aiding in a better comprehension and contextualization of the request. The level of actual involvement and support depended on the stage of the euthanasia request, their social network, and the reasons behind the request. There was a demand for transparent communication, more emotional and practical support, and assistance in coping with the emotionally charged process. Specific attention is needed for the emotional and cognitive rollercoaster, even if euthanasia is not ultimately pursued. Future research should employ a longitudinal design to gain deeper insights into relatives' fluctuating experiences and support needs throughout euthanasia trajectories. Seeking greater context diversity and combining perspectives in cluster research can improve understanding of interconnected needs.

Energetic Electrons Accelerated and Trapped in a Magnetic Bottle above a Solar Flare Arcade

Where and how flares efficiently accelerate charged particles remains an unresolved question. Recent studies revealed that a “magnetic bottle” structure, which forms near the bottom of a large-scale reconnection current sheet above the flare arcade, is an excellent candidate for confining and accelerating charged particles. However, further understanding its role requires linking the various observational signatures to the underlying coupled plasma and particle processes. Here we present the first study combining multiwavelength observations with data-informed macroscopic magnetohydrodynamics and particle modeling in a realistic eruptive flare geometry. The presence of an above-the-loop-top magnetic bottle structure is strongly supported by the observations, which feature not only a local minimum of magnetic field strength but also abruptly slowing plasma downflows. It also coincides with a compact above-the-loop-top hard X-ray source and an extended microwave source that bestrides the flare arcade. Spatially resolved spectral analysis suggests that nonthermal electrons are highly concentrated in this region. Our model returns synthetic emission signatures that are well matched to the observations. The results suggest that the energetic electrons are strongly trapped in the magnetic bottle region due to turbulence, with only a small fraction managing to escape. The electrons are primarily accelerated by plasma compression and facilitated by a fast-mode termination shock via the Fermi mechanism. Our results provide concrete support for the magnetic bottle as the primary electron acceleration site in eruptive solar flares. They also offer new insights into understanding the previously reported small population of flare-accelerated electrons entering interplanetary space.

Challenges, experiences, and potential supports for East and Southeast Asian mothers in the workforce: a systematic review

ObjectiveTo examine the challenges faced by Asian working mothers with a focus on re-entry to the workplace. In addition, we highlight potential supports that retain women in the workforce.DesignA systematic review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations and registered with PROSPERO database (CRD42022341130).MethodsThree independent reviewers were involved in the study selection to screen the search results sequentially by title, abstract, and full text using predefined inclusion and exclusion criteria. The methodological quality of each article was assessed via the Critical Appraisal Skills Programme (CASP) tool.ResultsWe analysed a total of 36 studies conducted across different regions: 30 from the East and 6 from Southeast Asia. Among these studies, 20 were quantitative in nature, 15 were qualitative, and one intervention. The 36 studies cover five themes: 1) policies, 2) external support sources, 3) external pressure, 4) breastfeeding and 5) health status. Within each theme the same factor can have a positive or negative impact on the mother depending on her having a pro-career or pro-family mindset.Companies can take various initiatives to support working mothers, such as providing facilities for expressing breast milk at the workplace, educating staff to promote breastfeeding and accommodate childcare needs, and extending maternity leaves. However, there is a lack of literature that directly addresses the barriers and concrete support available to working mothers in Asia, beyond the scope of breastfeeding.ConclusionsOur findings underscore several obstacles that can impede a woman's seamless return to work. Pro-family and pro-career mothers have differing needs that cannot be addressed at the same time. There is a lack of comprehensive understanding regarding effective strategies or interventions that can support a positive reintegration into the workforce.

Characterization of stability and support force of loess caves in northwest China

Numerous manually excavated loess caves are present within a cultural relic protection zone in the northwestern region of China. The collapse of these caves frequently leads to the cracking, tilting, and even collapse of ancient buildings above, posing a severe threat to the safety of cultural architectural relics. Investigating the stability and characteristics of deformation and failure in loess caves is essential for effectively reinforcing and protecting cultural relics. A two-dimensional model of a loess underground cavern was developed using OptumG2. The stability and modes of deformation and failure in the underground cavern were analyzed through the augmentation of soil gravity and the strength reduction method. This analysis determined the cavern's safety factor, force, deformation and damage mode, and the plastic zone's progression. Numerical simulations analyzed the force characteristics of the support structure under different stress release ratios. The findings revealed that, with the implementation of an anchor rod concrete lining support scheme, the most probable failure mode is a shear failure, initiating at the arch foot. The ground's stress release rate does not influence the safety factor of the cavern but rather the material, design, and strength of the support structure. However, the magnitude of the internal forces acting on the supporting structure by the soil in the cavern is related to the degree of ground stress release. When applied during significant stress release, support structures may experience reduced internal forces, albeit with more substantial stratum displacement; opting for an appropriate stress release when applying support structures is crucial for achieving optimal stratum displacement and lining internal forces.

The study of the blast resistance performance of underground cavern support structures under the effect of explosive ground loads

The use of support structures with good explosion resistance to support and reinforce underground projects has become a focus of concern for relevant units in order to ensure the safety of underground projects in explosive ground loads. The blast resistance of underground caverns and the influence of support parameters on blast resistance have been studied when lining and pre-stressing anchors are supported individually under dynamic and static coupling. Straight-walled arched caverns are chosen for this study because of their strong blast resistance. The influence of excavation unloading on the support structure was analyzed under the condition of a burial depth of 500 m. The study investigated the blast resistance of caves supported solely by singular concrete lining support and singular pre-stressed anchor bolt support. The research findings indicate that pre-stressed anchor bolts significantly limit the deformation capacity of surrounding rock while lining is more effective in restricting the vibration response of surrounding rock. The pre-stressed anchor bolts ensure operation within the strength range throughout the entire process with no alteration in load-bearing capacity. Increasing the thickness of the lining can reduce the vibration response of the cavern. Meanwhile, enhancing the pre-stressed anchor bolts within a certain range notably restricts the deformation response of the cavern. Therefore, the pre-stressed anchor bolts should be employed as the supporting structure to bear the excavation and unloading loads of the cavern.

Teacher Education during the COVID-19 Pandemic: Tensions and Challenges of Initial Teacher Training Practices

The objective of the study is to characterize the ways of understanding and functioning of the formative triads of pedagogical practices, based on the decisions, tensions, and challenges faced by the initial teacher training programs in times of pandemic. The research used a qualitative-phenomenological perspective, inquiring into natural situations experienced by the formative triads of the pedagogical careers of 23 Chilean universities with recognized trajectories in teacher training. The interviews were conducted when the country was in a health emergency, that is, when schools and universities were carrying out remote teaching. The results show that the pandemic transformed the collaborative links between schools and universities, some links were broken, and others were strengthened, showing that the functioning of the triads is more declarative than real. In addition, the trainers (university tutor teacher and school guide teacher) faced two disconnected scenarios (school and university) that did not provide them with clear guidelines and concrete support for the development of their roles. This research has relevance for teacher training programs because it stresses the design of action plans to give continuity to practices in emergency situations and orients the evaluation of practice models to decide if they have the conditions to implement a model based on the formative triad.

Service navigation and concrete supports from a family Perspective: A preventative and community-based approach to child welfare

The child welfare system in the United States has historically focused funding on intervening after child maltreatment has occurred, with fewer resources allocated to prevention. However, research has found that families benefit from concrete supports, like financial payments, and when families are provided with these supports, child welfare involvement significantly declines. Less is known about the impact of preventative approaches, such as service navigation, which could act as a bridge between families and essential concrete supports and resources. Additionally, it is vital to incorporate family voice into decisions being made regarding the development and evaluation of prevention programming. This qualitative study explores family experiences and outcomes with community-based service navigation. The sample included 12 family members working with a community navigator at the time of data collection. Data were obtained through focus groups and interviews held in English, Spanish, and Arabic. A thematic analysis guided the researchers in better understanding participants’ perspectives on service navigation. Results indicate that participants found preventative service navigation to be a supportive and collaborative experience through which they were connected with concrete supports and other essential resources. Five themes were identified: (1) normalizing the need for support; (2) time as a limited resource for families; (3) service navigation as empowering and humanizing for families; (4) service navigation poses new challenges for families; and (5) service navigation creates new opportunities for families. Results from this study suggest that service navigation may represent a more socially just intervention to ensure child safety, permanency, and well-being.

Perceptions of a Youth-Serving Training Program: A case study

Capturing the voices of individuals working in youth-serving systems is invaluable to understanding what makes for a meaningful and beneficial training experience. One such training program, Youth Thrive, was developed by the Center for the Study of Social Policy (CSSP) to promote the health and well-being of youth (ages 9-26) by introducing research on youth development, neuroscience, trauma, and resilience to youth-serving agencies. The culmination of these components inspired Youth Thrive’s use of protective and promotive factors to understand and advocate with and for youths. These factors included youth resilience, social connections, knowledge of adolescent development, concrete support in times of need, and cognitive and socialemotional competence. Recognizing that the effectiveness of youth-based trainings is contingent upon the perceptions and experiences it offers participants. This qualitative and illustrative case study sought to answer the following questions: (1) How do participants perceive the training? and (2) How has the experience helped participants in their youth-serving roles? In turn, these responses can provide us with greater understanding of what successful youth-serving intervention trainings might embody. Interviews were conducted with 17 participants with varying levels of experience in the deployment of youth services. The following themes were uncovered at the conclusion of the analysis stage: (1) Bond over common language; (2) Youth-centered focus; (3) Reaffirming practitioner’s approaches in practice; and (4) Building a community of learners. In addition, internal training material were collected and reviewed. Discussion of strategies, including a feedback loop, are explored.