Precarious Balance Research Articles

The Diversity of Voices in Universities: A Critical Reflection on Representation Based on Two University Projects in Iceland and Germany

ABSTRACTBackgroundUniversities are deeply rooted in a tradition of exclusivity. However, for the past several years, they have been called upon to develop in an inclusive and socially responsible manner that does justice to the plurality of society. This has led to the emergence of diverse practices and projects around the world that are intended to open up universities to previously excluded and marginalised groups of people. At the same time, findings from postcolonial studies, such as Spivak's discussions on the topic of representation, show that such processes of change must always be accompanied by critical reflection. This article offers a reflexive analysis of two university projects—one in Iceland and one in Germany—where people with learning difficulties are employed as academic staff, engaged in both teaching and research.MethodsThis article is a result of a collaboration between three nondisabled lecturers and three lecturers with learning disabilities, co‐written across three languages—German, Icelandic and English. The authors worked together to explore theories of representation, ensuring that their discussions and writing were accessible to all members, regardless of language or disability. The article discusses two projects from Iceland and Germany.FindingsThe article shows that inclusive higher education developments are necessary. The projects presented in the article have created work opportunities for people with learning disabilities in the previously exclusive setting of the university. The article provides descriptions of the exemplary life paths of the three lecturers with learning disabilities who co‐authored this article. They have had to navigate the precarious balance between being reduced to mere representatives of their disability and contributing valuable academic knowledge. The findings suggest that an inclusive university can foster equitable academic environments, contributing to the transformation of higher education by reflecting diverse viewpoints and experiences.ConclusionsInitiatives in Iceland and Germany highlight significant progress towards more inclusive universities by integrating individuals with learning disabilities into academic roles, challenging traditional power dynamics. Spivak's (2008) concept of representation emphasises the need to include marginalised voices in academic discourse, ensuring they are genuinely reflected. While these efforts are crucial, continuous critical reflection is necessary to avoid reinforcing inequalities. Moving forward, universities must embed inclusion into all aspects of their structures, creating meaningful opportunities for marginalised groups to influence decision‐making. This approach will ensure that representation is transformative and drives genuine social change.

Limes (the Roman Frontier): Developing a Video Game for History Learning

The use of gaming technologies in education holds great promise to provide engaging learning experiences. Whereas video games have been successfully used to foster learning in several school subjects, the current understanding of the potential of video games for history learning is still limited. This paper details the development of Limes, a 2D top-down educational game created in Unity and rendered in pixel art. The game targets 5th/6th grade secondary school students and is set in the third century AD in southern Germany, a period characterized by political and social instabilities. Limes digs into the complex relations between the Roman Empire and the Alemanni tribe, one of the most powerful Germanic tribes of this period. The player can experience this pixelated world through the eyes of an Alemanni child, who forms a friendship with a Roman centurion. The unfolding narrative places the young protagonist in the precarious balance of peace and conflict, and the player needs to navigate the diplomatic tensions of the era. The gameplay consists of five levels, including primary missions and optional secondary missions which unlock special features (e.g., puzzles, quizzes). Limes incorporates a variety of game mechanics, ranging from running and interacting with characters to stealth missions, throwing rocks, and horse racing. These dynamics are integrated into the historical narrative of the game, enriching the player's experience. The game development process combined insights and methods from multiple disciplines, including game-based learning, educational, social, and cultural psychology, education sciences and pedagogy, and history education. Moreover, the game capitalizes on Unity’s wide array of development tools, which provide extensive customization possibilities, and employs pixel art, facilitating an engaging environment while maintaining a cost-conscious development process. Initial tests and expert feedback highlight the promise of Limes as a game that leverages historical accuracy and innovative educational tools to foster a deeper understanding of Roman history. Next steps include empirical studies with students to test the game's effectiveness (e.g., in improving interest in and knowledge of Roman history).

Errors in the visual perception of the victim

A particularly complex activity, listening to people is often the object of criticism that mainly concerns the precarious balance required to be maintained between the desire of the persons involved for a broad interpretation in the field of limits needed to be imposed to the professional approach of the investigation and the desire of professionals to be able to use as many means and procedures as possible to put pressure on the interviewed person, to break his/her will in order to obtain as much useful information as possible. Perception is a cognitive psychic process, which consists in reflecting objects and phenomena in the integrity of their qualities at the moment of action on the sense organs. It is rightly considered that perceptual activities are the basis of all behaviors, as without prior perception it will not be possible to learn, speak, memorize, communicate. Perception allows us to become aware of the environment and to interact with it or act on it. Errors of perception, as well as other types of errors admitted by the person, are recognized by the legislature as a basis for criminal liability, and are therefore attributable, since in this case, by exercising a greater dose of care and prudence, the perpetrator should and could have been aware that he was admitting an error. A special role in the process of forming the statements of the injured party is played by visual sensations, in that they provide an accurate and complete picture of the surrounding world. The individuality of the one who is heard, both in the actual listening and during possible reconstructions, confrontations, or presentations for recognition, is likely to generate deviations from objective truth. Preconceived ideas and points of view influenced by discussions with others change the range of elements that the listened person might remember about the deed. The danger of influencing those who testify in cases of sensation is particularly great. Even if there are several statements that coincide, the fact itself gives only a conditional guarantee about the trust that the investigator can have in them.

Exploring Human Nature: A Comparative Analysis of William Golding's Lord of the Flies and George Orwell's Animal Farm

This in-depth comparative analysis embarks on a captivating journey into the exploration of human nature as depicted in two enduring literary masterpieces: William Golding's timeless Lord of the Flies and George Orwell's thought-provoking Animal Farm. Through a meticulous dissection of character interactions, allegorical motifs, and underlying themes, this study unveils the intricate ways in which both authors delve into the depths of human behavior and societal constructs. Golding's narrative plunges readers into the primal instincts that sur-face within a group of stranded boys, shedding light on the raw potential for violence and chaos inherent in humanity. Meanwhile, Orwell's allegorical farm animals serve as a lens through which to dissect the insidious influence of power and the erosion of ideals in the face of totalitarian regimes. As we delve further in-to the nuances of these literary works, we discover the distinct artistic lenses through which Golding and Orwell examine human nature. Golding's exploration of the fragility of order within a microcosm reflects the precarious balance be-tween civilization and savagery, while Orwell's satirical depiction unravels the mechanisms by which authority morphs into tyranny. This comparative analysis ultimately underscores the authors' unique yet complementary endeavors to illuminate the complexities of human behavior and the profound impact of societal structures. In doing so, it reaffirms the enduring significance of these narratives as windows into the human experience, resonating across time and culture.

Taking the plunge, juggling acts, and friendly fire

Students embarking on higher education confront many challenges. Particularly since the Covid-19 pandemic, universities have become increasingly concerned to address these challenges and to develop comprehensive strategies to nurture student wellbeing. Distance learning courses create additional pressures, however, and not only because online students tend to be older than typical undergraduate student cohorts and therefore present with an array of social and caring responsibilities at the point of enrolment. The present study’s objectives were to explore how distance learning students describe their experiences of online learning, with a particular focus on their engagement with their course, their lifestyle and wellbeing challenges, and their interactions with staff and fellow students. Developing Shinebourne and Smith’s (2010) innovative phenomenology coupled with experiential metaphor methodology, we employed a two-stage data collection methodology based on participant diaries and follow-up interviews. In Stage 1, diaries captured student experiences in real time. Diary entry data subsequently informed the schedules of the semi-structured interviews that followed in Stage 2. Metaphorical analysis provided insight into online students’ lifeworlds, in terms of the practical challenges of balancing roles with time pressures, the existential struggle of forging a new identity, and the search for meaningful interpersonal connections. Six inter-related metaphors were unearthed: ‘Plunging into the Deep’; ‘Impostor Syndrome’; ‘A Precariously Balanced Juggling Act’; ‘The Gift of Time’; ‘Hostile Territories and Friendly Fire’; and ‘House of Cards’. Confirming and extending previous work, our findings demonstrate that online distance learning is a journey of self-doubt and discovery interrupted by both traumatic and transformative moments as students strive to succeed against multiple existential threats. We recommend that universities devote resources to facilitating an understanding of online students’ unique circumstances to provide them with informed and effective wellbeing support at the start of and throughout their journeys.

Profiling plasma alterations of extracellular vesicles in patients with acutely decompensated cirrhosis and bacterial infection.

Extracellular vesicles (EVs) modulate inflammation, coagulation and vascular homeostasis in decompensated cirrhosis. To characterize the profile of plasmatic EVs in patients with decompensated cirrhosis and bacterial infections and evaluate the association between EVs and the development of hemostatic complications. We measured the levels of EVs using high-sensitivity flow cytometry and phospholipid-dependent clotting time (PPL) in a prospective cohort of hospitalized patients with acutely decompensated cirrhosis with versus without bacterial infections. A separate cohort of patients with bacterial infections without cirrhosis was also enrolled. We measured endothelium-, tissue factor (TF)-bearing, platelet- and leukocyte-derived EVs. In patients with infections, EVs were reassessed upon resolution of infection. Bleeding and thrombotic complications were recorded during 1-year follow-up. Eighty patients with decompensated cirrhosis were recruited (40 each with and without bacterial infections). Electron microscopy confirmed the presence of plasma EVs. Despite no difference in total EVs and PPL, patients with cirrhosis and infection had significantly higher TF+ EVs, P-Selectin+ EVs (activated platelet-derived), CD14+ EVs (monocyte/macrophages derived) and CD14+ TF+ EVs versus those with cirrhosis without infection. Upon infection resolution, levels of these EVs returned to those without infection. Patients with infections showed a significant association between reduced P-Selectin+ EVs and bleeding complications (HR 8.0 [95%CI 1.3-48.1]), whereas high levels of leukocyte-derived EVs (CD45+) and CD14+ EVs were significantly associated with thrombotic complications (HR 16.4 [95%CI 1.7-160] and 10.9 [95%CI 1.13-106], respectively). Results were confirmed in a validation cohort. Bacterial infections are associated with particular alterations of plasma EVs profile in decompensated cirrhosis. Bacterial infections trigger the release of EVs originating from various cell types, which may tip the precarious hemostatic balance of patients with acutely decompensated cirrhosis towards hyper- or hypocoagulability.

Navigating between socio-economic viability and environmental impacts: The sachets and sticks paradox

Sachets and plastic sticks, single-use packaging primarily constructed from polyethylene terephthalate (PET), have proliferated globally for their convenience and multilayered construction that ensures product integrity. Especially prominent in emerging markets and amplified by pandemic-driven demand for hygiene products, these formats contribute significantly to fossil fuel industry revenue, aligning closely with petrochemical infrastructure developments such as fracking. While providing producers risk mitigation and cost-effective branding opportunities, these packaging types impose significant environmental tolls. The multimaterial layered composition of these materials hampers recycling efforts, and incineration releases toxins, exacerbating pollution. The plastics industry thus becomes an economic support for fossil fuel sectors facing declining oil demand. The growth of this sachet-stick economy represents a precarious balance between immediate economic benefits and long-term environmental ramifications. As global attention increasingly turns toward sustainability and pollution reduction, it becomes crucial to analyze the true environmental and socioeconomic costs of sachet and stick packaging.

European climate policy for decarbonization: State of the art

This paper aims to analyse European climate policy's state of the art concerning the urgent need to decarbonize society and the economy and meet pressing climate demands. Decarbonization refers to the progressive reduction of the carbon-to-hydrogen ratio within energy sources. The primary objective consists of a gradual transition to sustainable economic less polluting development models. The Paris Agreement (2015) highlighted the need to take concrete and timely action to prevent the planet's already precarious balance from definitively collapsing. This paper analyses the main strategies that the European Union has conducted to take an active part in the decarbonization project by critically highlighting the challenges and opportunities that await us in the future.

San Andreas Fault Earthquake Hazard Model Validation Using Probabilistic Analysis of Precariously Balanced Rocks and Bayesian Updating

Abstract The Mojave section of the San Andreas fault is the closest section to the megacity of greater Los Angeles. A major issue for the population is that the life-threatening hazard estimate of a future rare, large earthquake on this fault section is highly uncertain and untested at timescales and ground motions beyond limited historical recordings. Of relevance to this issue is that the nearby precariously balanced rocks at Lovejoy Buttes have survived these ground motions, despite the past tens of thousands of years of San Andreas fault earthquakes. Therefore, the fragility and age of these precariously balanced rocks provide crucial ground-motion constraints over the timescales of rare, large San Andreas fault earthquakes. We rigorously validate and update an earthquake hazard model for the Mojave section of the San Andreas fault using the independent observational data of precariously balanced rock survival at Lovejoy Buttes. The joint probability of survival of all five studied precariously balanced rocks was used to validate the hazard estimates and reweight the estimates using new Bayesian updating methods to deliver an improved, precariously balanced rock-informed earthquake hazard estimate. At an annual frequency of exceedance of 1×10−4 yr−1, equivalent to a mean return period of 10,000 yr, the precariously balanced rock survival data significantly reduced the mean hazard ground-motion estimate by 65% and the 5th–95th fractile uncertainty range by 72%. The magnitude of this inconsistency provides striking evidence for the need to reevaluate both the source and ground-motion components of our earthquake hazard model for the southern San Andreas fault.

Virtual Shake Robot: Simulating Dynamics of Precariously Balanced Rocks for Overturning and Large-displacement Processes

Understanding the dynamics of precariously balanced rocks (PBRs) is important for seismic hazard analysis and rockfall prediction. Utilizing a physics engine and robotic tools, we develop a virtual shake robot (VSR) to simulate the dynamics of PBRs during overturning and large-displacement processes. We present the background of physics engines and technical details of the VSR, including software architecture, mechanical structure, control system, and implementation procedures. Validation experiments show the median fragility contour from VSR simulation is within the 95% prediction intervals from previous physical experiments, when PGV/PGA is greater than 0.08 s. Using a physical mini shake robot, we validate the qualitative consistency of fragility anisotropy between the VSR and physical experiments. By overturning cuboids on flat terrain, the VSR reveals the relationship between fragility and geometric dimensions (e.g., aspect and scaling ratios). The ground motion orientation and lateral pedestal support affect PBR fragility. Large-displacement experiments estimate rock trajectories for different ground motions, which is useful for understanding the fate of toppled PBRs. Ground motions positively correlate with large displacement statistics such as mean trajectory length, mean largest velocity, and mean terminal distance. The overturning and large displacement processes of PBRs provide complementary methods of ground motion estimation.

I giorni dell’alluvione in Romagna. Riflessioni tra storia e orografia del territorio

The flood that hit Romagna on 16 May was an environmental disaster without precedent, in terms of gravity and scale, in national history. The article explores a chronicle of those days, attempting to provide a historical perspective, in an area that is largely the result of reclamation works, built with the labour of farm workers and resting on a precarious balance that must be protected.

A holistic motility understanding of the social phenomena underlying inter-city high-speed rail commuting: Evidence from China's Yangtze River Delta

As high-speed rail (HSR) becomes more widespread, inter-city commuting is becoming an increasingly prevalent social phenomenon, yet little attention has been paid to obtaining a deeper understanding of the interdependence of various factors and how they contribute to the phenomena. This paper fills the gap by utilising the concept of motility to frame the analyses of in-depth interviews with HSR commuters between Suzhou and Shanghai in China's Yangtze River Delta. As the first in-depth qualitative study on this topic, our findings advance a holistic understanding of the perception, experience, compromised habits, strategies, and decision trade-off underlying the HSR intercity commuting behind the dark mobility numbers. This new empirical evidence of HSR commuting sheds light on the interdependence of the three elements of motility (range of possibilities, competence and cognitive appropriation). With better employment opportunities accessible by HSR, yet due to the nature of work, personal and family situations, and mobility constraints, cognitive appropriation of HSR commuters leads to various deliberate habits and strategies for daily, weekly, and flexible commuting, which is a precarious balance between individual competence and range of possibilities prompted by HSR either favourable or unfavourable conditions. These issues reflect the value of motility for critical assessments of transport policy and wider associated policy areas to achieve subsequent improvement of personal well-being. Also, the dominant one-way commuting from neighbouring smaller cities to economic powerhouse reflects a need for strategies that coordinate economic function and transport accessibility and enable better balanced two-way economic and commuting patterns in the long run.

Negotiating Engineering and Activism: French Environmentalist Engineers Conforming to, Shifting, and Overstepping Professional Boundaries

This paper explores three different forms of negotiation implemented by environmentalist engineers between their professional work and their environmental activism. These engineers, members of environmentalist organizations, appropriate in different ways this conceptual professional boundary that separates and opposes the social worlds of engineering and activism. The article draws from narrative interviews with 50 environmentalist engineers that focused on the dynamics of these negotiations and their effects on biographical trajectories. The process of conforming, shifting or overstepping the boundary between profession and activism is linked to the framing of environmental causes. The precarious balances these engineers strike between work and activism thus depend on three factors: the emergence (or not) of a professional reflexivity, the adoption (or not) of a political interpretation and the reaction of hierarchical superiors and company management.

Exploring Work Absences and Return to Work During Social Transition and Following Gender-Affirming Care, a Mixed-Methods Approach: ‘Bridging Support Actors Through Literacy’

PurposeResearch on return to work (RTW) following transition-related gender-affirming care (GAC) is lacking. We aim to study the RTW outcomes and experiences of transgender and gender diverse (TGD) people during social and medical transition to understand their needs better and provide tailored support.MethodsIn this convergent mixed-methods study, the questionnaires of 125 employed TGD people, who took steps in transition (social and GAC), were analyzed for personal- and work characteristics, medical work absences, RTW, support at work, and health literacy. In-depth interviews were held with twenty TGD people to explore perceived facilitators and barriers to RTW.ResultsOne hundred and nine participants reported an average of 38 sick days after GAC. The majority (90.2%) resumed their job at the same employer. Although TGD workers felt supported, their health literacy (55.1%) was lower compared to the general population. The qualitative data analysis revealed four major themes: (1) the need and access to information; (2) having multidisciplinary TGD allies; (3) the influence of the occupational position; (4) the precarious balance between work, life, and GAC. Especially participants with a low health literacy level experienced RTW barriers by struggling: (1) to find and/or apply information; (2) to navigate (occupational) health and insurance services.ConclusionOur research has shown that RTW for TGD individuals is a multifaceted process, affected by personal factors, work-related elements, and the characteristics of the healthcare and social insurance system.Enhancing support for TGD people at work and their RTW requires a high need for centralized information and promoting health literacy while engaging relevant stakeholders, such as prevention services and employers.

Comparative analysis of metaheuristic optimization approaches for multisource heat pump operation

Through the use of effectively unlimited energy from the environment, contemporary heat pump installations have proven to be a highly efficient means for satisfying both heating and cooling needs. As such, they are often regarded as a key driver in the electrification process of the thermal domain. Keeping in mind the significant share of the thermal demand in building energy requirements, this aspect in particular is projected to have a great impact on the overall energy efficiency improvement of buildings and increase of demand-side flexibility. The latter point is considered crucial for improving the precarious balance against the contemporary intermittent power supply obtained from a variety of renewable sources. However, in the process of increasing their efficiency, heat pump systems are becoming significantly more complex with combinations of various different sources of energy from the ground, air and the Sun. By extension, the complexity of managing their operation has also increased and proves to be a challenge even for experienced plant operators. In order to aid in this regard, relevant literature suggests that optimization algorithms can be considered as a viable tool. This paper explores the limited extent of existing state-of-the-art approaches for hybrid heat pump control via metaheuristic optimization and broadens the subject matter with a comparative study that analyzes and benchmarks several metaheuristic approaches found in the literature on similar problems. A real-world multisource heat pump installation in Ferrara is utilized as the basis for the study.

Coagulation management during liver transplantation: monitoring and decision making for hemostatic interventions.

Rebalanced hemostasis describes the precarious balance of procoagulant and antithrombotic proteins in patients with severe liver failure. This review is aimed to discuss currently available coagulation monitoring tests and pertinent decision-making process for plasma coagulation factor replacements during liver transplantation (LT). Contemporary viscoelastic coagulation monitoring systems have demonstrated advantages over conventional coagulation tests in assessing the patient's coagulation status and tailoring hemostatic interventions. There is increasing interest in the use of prothrombin complex and fibrinogen concentrates, but it remains to be proven if purified factor concentrates are more efficacious and safer than allogeneic hemostatic components. Furthermore, the decision to use antifibrinolytic therapy necessitates careful considerations given the risks of venous thromboembolism in severe liver failure. Perioperative hemostatic management and thromboprophylaxis for LT patients is likely to be more precise and patient-specific through a better understanding and monitoring of rebalanced coagulation. Further research is needed to refine the application of these tools and develop more standardized protocols for coagulation management in LT.

Salt Substitutes – Utility and Safety in Chronic Kidney Disease

In the shadow of the global sodium burden, chronic kidney disease (CKD) patients face a particularly precarious balancing act. While reducing sodium intake is essential for mitigating cardiovascular risks and slowing CKD progression, conventional salt substitutes containing potassium pose a looming threat of hyperkalemia due to impaired renal potassium excretion. Despite promising benefits like lowered blood pressure and reduced cardiovascular events observed in the general population, robust data on the efficacy and safety of these substitutes in CKD is scarce. Hence, the urgent need arises for targeted research to establish precise risks and benefits of various salt-substitution strategies tailored specifically for the CKD population. Ideally, the holy grail of this endeavor would be the discovery of a sodium-minimizing, potassium-free substitute that flawlessly mimics the sensory experience of salt, thus empowering CKD patients to navigate experience nutritional prudence and culinary delight. The path forward demands meticulous investigation and the development of personalized sodium-reduction strategies that hold the key to unlocking a healthier future for CKD patients.

A new tractable method for generating human alveolar macrophage-like cells in vitro to study lung inflammatory processes and diseases.

Alveolar macrophages (AMs) are unique lung resident cells that contact airborne pathogens and environmental particulates. The contribution of human AMs (HAMs) to pulmonary diseases remains poorly understood due to the difficulty in accessing them from human donors and their rapid phenotypic change during in vitro culture. Thus, there remains an unmet need for cost-effective methods for generating and/or differentiating primary cells into a HAM phenotype, particularly important for translational and clinical studies. We developed cell culture conditions that mimic the lung alveolar environment in humans using lung lipids, that is, Infasurf (calfactant, natural bovine surfactant) and lung-associated cytokines (granulocyte macrophage colony-stimulating factor, transforming growth factor-β, and interleukin 10) that facilitate the conversion of blood-obtained monocytes to an AM-like (AML) phenotype and function in tissue culture. Similar to HAM, AML cells are particularly susceptible to both Mycobacterium tuberculosis and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections. This study reveals the importance of alveolar space components in the development and maintenance of HAM phenotype and function and provides a readily accessible model to study HAM in infectious and inflammatory disease processes, as well as therapies and vaccines. IMPORTANCE Millions die annually from respiratory disorders. Lower respiratory track gas-exchanging alveoli maintain a precarious balance between fighting invaders and minimizing tissue damage. Key players herein are resident AMs. However, there are no easily accessible in vitro models of HAMs, presenting a huge scientific challenge. Here, we present a novel model for generating AML cells based on differentiating blood monocytes in a defined lung component cocktail. This model is non-invasive, significantly less costly than performing a bronchoalveolar lavage, yields more AML cells than HAMs per donor, and retains their phenotype in culture. We have applied this model to early studies of M. tuberculosis and SARS-CoV-2. This model will significantly advance respiratory biology research.

COVID-19 and Frailty.

Older age is a major risk factor for adverse outcomes of COVID-19, potentially due to immunosenescence and chronic low-grade inflammation, both characteristics of older adults which synergistically contribute to their vulnerability. Furthermore, older age is also associated with decreased kidney function and is consequently associated with an increased risk of cardiovascular disease. All of this in the course of COVID-19 infection can worsen and promote the progression of chronic kidney damage and all its sequelae. Frailty is a condition characterized by the decline in function of several homeostatic systems, leading to increased vulnerability to stressors and risk of adverse health outcomes. Thus, it is very likely that frailty, together with comorbidities, may have contributed to the high vulnerability to severe clinical manifestations and deaths from COVID-19 among older people. The combination of viral infection and chronic inflammation in the elderly could cause multiple unforeseen harmful consequences, affecting overall disability and mortality rates. In post-COVID-19 patients, inflammation has been implicated in sarcopenia progression, functional activity decline, and dementia. After the pandemic, it is imperative to shine a spotlight on these sequelae so that we can be prepared for the future outcomes of the ongoing pandemic. Here, we discuss the potential long-term consequences of SARS-CoV-2 infection and its possibility of causing permanent damage to the precarious balance existing in the frail elderly with multiple pathologies.

A New Insight into the Stability of Precariously Balanced Rocks

Large granitic boulders resting on steep slopes represent considerable safety hazards that largely depend on the location of the contact surface characterized by the impression d, denoting the parallel distance between the contact surface and the original rock surface. On the other hand, this impression reflecting the often convex nature of the contact between boulders and resting platforms, cannot be measured precisely, so Factors of Safety (FoS) computed with this input may have significant uncertainties. Using geometric 3D analysis, here, we present the concept of computing FoS as a function of the impression d, admitting a much more reliable estimate of the actual hazards. Beyond introducing the FoS functions, we also identify all failure modes, some of which have not yet been investigated. We compute the FoS functions for the boulder Pena do Equilibrio, located in Spain. Our computations for FoS against sliding match all earlier results. However, we also compute FoS against toppling and against torsion and show that the latter may be critical. Since our methods are general, this suggests that torsion phenomena, which have been scarcely studied so far, may be relevant to analyze the stability of other natural rock boulders.