Investigation of High Vibration Phenomena in Steam Turbine: An Experimental Exploration into Root Causes and Material Analysis

The steam turbine is a rotating device subject to axial and radial shaft shifts that can induce vibrations during operation. Tools such as monitoring systems and proximity probe sensors are essential to monitoring these vibrations. High vibrations affect the machine’s performance, increasing the risk of malfunctions and reducing its lifespan, and also pose risks to operational and maintenance personnel. The intensified vibrations in the bearing pedestals signify the underlying issues with the machine’s normal operation. Consequently, problems such as rotor imbalance, coupling misalignment, mechanical looseness, material failure, and bent shaft may be caused. In the current study, the latest field-proven automatic diagnostic of rotary equipment (ADRE 408) data acquisition system is installed by Bentley Nevada to investigate the root cause of high vibration. This advanced diagnostic system facilitates a comprehensive assessment, enabling us to effectively identify and address underlying problems. Hence, the current research includes a thorough diagnosis of the underlying problems to attenuate the risks of high vibrations in the steam turbine, coupled with strategic maintenance planning and corrective actions.

Photocatalytic Aerobic Conversion of Methane

The direct conversion of methane into high-value chemicals has been a persistent research focus in the fields of chemical engineering and energy. Photocatalysis, as an innovative technology, not only circumvents the issues of catalyst sintering and carbon deposition associated with traditional thermal catalysis but also transcends thermodynamic limitations by providing new reaction pathways. Utilizing molecular oxygen as an oxidant generates various reactive oxygen species, offering unique thermodynamic advantages for methane conversion. This review summarizes the advancements in photocatalytic partial oxidation (PPOM) and oxidative coupling of methane (POCM) using oxygen as an oxidant. It discusses the activation mechanisms and reaction pathways of methane and oxygen in different systems, as well as the application of photochemical cycling strategies in methane conversion. Finally, it addresses the challenges in this field, proposes potential solutions, and offers perspectives on the future development of photocatalytic systems.

Documenting the Changing Floodplain of Nileas Basin in North Euboea (Greece) before and after Storms Daniel and Elias

The area of north Euboea is characterized by its intense relief, dense hydrographic network, and rich flora and fauna. In the mid-2010s, the region was struck by a plane tree disease that withered the large population of plane trees in the area, while in 2021, a large wildfire completely burned the forest. These unfortunate events depleted the landscape’s natural ability to manage and mitigate flood phenomena. Observing the landscape’s vulnerability to floods, in April 2023, we conduct on-site field inspections in the rivers of the area. In September 2023, a major flood hit the area, causing in dramatic changes to the landscape. Therefore, in November 2023, we conducted follow-up on-site field inspections in the area, in order to trace the differences, present the damages the phenomenon left behind. These inspections allowed to document the landscape changes from the combination of all previous events and identify any associated pathologies. Site visits and comparisons before and after the Daniel/Elias storm revealed dramatic changes in the riverbed width at lower altitudes, significant sediment accumulation in the Voudouros River delta, alterations in the natural landscape along the river and its floodplain, destruction of the arable land, and road collapses in several locations.

Return Their Names to Forgotten Bones: Memory Process about Spanish Civil War in Ponferrada (León)

For more than 80 years, Spain has had a human rights problem. Since the 18th of July 1936, when military personnel and fascists staged a coup d’état against the democratic government of the Second Republic, thousands of victims remain missing. We will examine how the victims have been treated by the State and how civil society has led the process of recovering democratic memory. We will focus on its impact in the Bierzo region, in the northwest of the Iberian Peninsula, and its importance in this process. We will also look at how scientific efforts continue to search for missing persons. History, archaeology, physical anthropology, and genetics join forces to repair the victims of the Spanish Civil War and Franco’s dictatorship.

Italian Stories of Archaic Human Forms. Book Review: Manzi, G. Antenati. Lucy e altri racconti dal tempo profondo; Il mulino: Bologna, Italy, 2024; ISBN: 9788815388018

Does Philosophy Kill Humor?

The title of this paper poses a paradoxical question, relating philosophy and humor, and tries to be humorous itself with the use of the verb “kill”. Against a more common, sometimes even academical, view of philosophy as a tremendously serious, deep, and complex corpus of knowledge—all theory and no praxis—the article challenges this view and will try to explain why humor, when associated with philosophy, can accelerate the understanding of a concept, and reveal unexpected spaces for reflection while donating moments of lightness and entertainment. In this perspective, humor reveals itself as a fundamental anthropological experience strongly connected to human freedom. I am aware that there are many different types of humor—irony, joke, slapstick, double-entendre, pun, deadpan-dry humor, etc., and also that the definition of “sense of humor” may be highly subjective, often related to the cultural profile of the person, and their geographical and historical contexts: what I consider funny, can be neutral or even offensive for another person. Nevertheless, among hundreds of interpretations, I will consider those which are more consistent with the scope of this paper. Moreover, if we think about the contemporary movement called philosophical counseling as a praxis that aims to help people in trouble and despair to see human problems from a wider and more rational Weltanschauung (view of the world), humor can become a useful tool to re-discover the frolicsome child inside ourselves: while playing with contrasts, metaphors, and metonymies, it induces a sudden, positive change of perspective. A process that is valid for both the counselor and the counselee, the self and the other: humor can provoke in the counselor a new and fresh way to understand the counselee’s difficulty; for the client, it can be a moment of tension release, or the start of a different way to address and approach life’s problems, or, even more, the beginning of a creative, transformative path.

Early Risk Indicators for DSM-IV Diagnoses in Adolescents and Young Adults with Intellectual Disabilities

Objective: To identify risk indicators at ages 6–18 years that are associated with DSM-IV diagnoses in adolescents and young adults with intellectual disabilities five years later. To assess the potential health gain and efficiency of preventive interventions targeting these risk indicators. Method: Parents reported on potential child, parental, and environmental risk indicators. Five years later, parents were interviewed using a standardised psychiatric interview schedule (DISC-IV) to assess DSM-IV diagnoses in children with ID (N = 614) at the age of 11 to 24 years. Logistic regression and linear probability models were used to test the contribution of risk indicators to the prediction of DSM-IV diagnoses. Results: Deviant levels of internalising and externalising problems, inadequate adaptive behaviour, and parental psychopathology predicted psychiatric disorder. Children/adolescents exposed to multiple risk indicators were at greater risk of developing DSM-IV disorders. Conclusions: Strategies aiming for the risk reduction of psychiatric disorders in children/adolescents with ID should focus on intervening at an early age, improving psychopathology and adaptive behaviour skills of the children/adolescents, and supporting their parents.

Shifting Prospects: Views and Strategies for Transforming Livestock and Meat Value Chains in a Dynamic Location

Rural areas characterized by resource-dependent industries often experience growth but also lock-in and transformation pressures. We ask what strategies industries and businesses pursue that successfully exploit the transformative potential of such a location and what prevents other industries and businesses from doing the same. Based on interviews with stakeholders and experts from the livestock and meat sector in a highly specialized location, we explore the will, resources, and capabilities of industries and actors to transform their businesses and entire value chains in ways that can stabilize the local growth regime. The analysis is based on a conceptual framework derived from resource-based and dynamic capability theories at the micro level and the concept of Strategic Action Fields (SAFs) at the meso level. The results suggest that incumbents from the old industrial core tend to counteract the transformation of the SAF with conservative strategies. Challengers from former support activities, in contrast, want to move away from cost competition towards new markets. Their product variation and horizontal diversification can exploit favorable cluster characteristics to develop future-proof capabilities. This should be encouraged, along with new entrepreneurial activity, even if the region is then no longer hosting the core industries of the transformed field. 

12th International Workshop on the CCN Family of Genes

Cellular Communication Network factors 1-6 (CCNs) are matricellular proteins consisting of an N-terminal secretory peptide and four multifunctional structural domains. The CCN1-6 members belonging to this family have a complex network of interacting ligands that can affect diverse signaling pathways through a multitude of mechanisms. Specifically, these proteins play crucial roles in cell proliferation, differentiation, angiogenesis, apoptosis, chondrogenesis, wound repair, and extracellular matrix (ECM) formation/remodeling. This short communication provides a brief summary of the 12th International Workshop on the CCN Family of Genes held at the Scandic Holmenkollen Park Hotel in Oslo, Norway from 20–23 June 2024.

Prospective Approaches for Ecosystem Sustainability Including Climate Mitigation

A summary, based upon foresight, futures, ideation and frontier technology studies of prospective approaches to foster ecosystem sustainability including climate mitigation at the technology and societal levels which are at scale and profitable. Approaches summarized include halophytes/salt plants grown on deserts/wastelands using saline/seawater, to address land, water, food, energy and climate, frontier energetics, nascent climate mitigation concepts, cellular agriculture, materials optimization, the virtual age, efficiency and redesigning the ecosystem for the Anthropocene. Solution/mitigation approaches are targeted at deforestation, desertification, pollution writ large (land, sea, air, space), and extensive urbanization along with soil salination, ocean acidification, mining, and water scarcity.