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• This study represents a pioneering effort in applying the "Learning to Lose Control Model" to understand problematic SNs use. • Adolescents exhibit common characteristics of PSNSU, including withdrawal, behavioral salience and impaired control. • Primary motives for SNs use among adolescents include emotional regulation, fear of missing out, and social interaction. • Maladaptive SNs use can lead to serious consequences, such as compromised academic performance, physical harm or social problems. • This research lays the groundwork for the development of targeted prevention and intervention programs, potentially enhancing adolescents' online experiences. Social networks (SNs) are immensely popular, especially among teenagers, yet our understanding of problematic SNs remains limited. Understanding motivations and patterns of use is crucial given the current prevalence of problematic SNs use. Perarles et al. (2020) distinguish two behavioral control modes: Model-Free Control, where actions are characterized by actions driven by immediate gratification without reflective consideration for long-term consequences, and Model-Based Control, enabling planned and goal-directed actions. Both control modes can lead to problematic social network use. This study aims to delve into problematic SNs use and the underlying motives behind adolescents' participation in SNs, drawing upon the theoretical proposal by Perales et al. (2020). We conducted four focus groups with adolescents aged 13–17 (50 % female; M age = 14.5, SD = 1.75), comprising two public school and two Catholic private school groups. Thematic analysis using Atlas.ti software revealed three themes. The first uncovers characteristics of problematic SNs use, including withdrawal, increased usage time, impaired control, behavioral salience and attentional capture and cognitive hijacking. The second spotlights motives, emphasizing emotional regulation, finding out what is going on, and social interaction. The third theme explores consequences such as compromised academic performance and physical harm. In conclusion, addressing both motives and problematic behaviors present a more effective approach to confronting SNs use challenges and fostering healthier online experiences for adolescents. [ABSTRACT FROM AUTHOR]

Abstract: Keeping XML data in a consistent state w.r.t. both structure and content is a burdensome task. To maintain the consistency of ever-larger, complex XML repositories, suitable mechanisms that are able to fix every possible inconsistency are needed. In this article, we present a methodology for semi-automatically repairing faulty XML repositories that can be integrated on top of an existing rewriting-based verification engine. As a formal basis for representing consistency criteria, we use a rule-based description formalism that is realized in the language Maude. Then, starting from a categorization of the kinds of errors that can be found during the verification process, we formulate a stepwise transformation procedure that achieves correctness and completeness of the XML repository w.r.t. its Maude formal specification while strictly observing the structure of the XML documents. With the aim of increasing the level of automation of our repair methodology, we also define two correction strategies and two completion strategies that reduce either the amount of information to be changed or the number of repair actions to be executed in order to deliver an XML repository that is both correct and complete. Finally, we describe a prototype implementation of the repairing tool, which we use for an experimental evaluation of our method with good results. [Copyright &y& Elsevier]

Abstract: Stress-wave analysis is a powerful and flexible technique to study mechanical properties of many materials. We present a simple technique to obtain information about the species of wood samples using stress-wave sounds in the audible range generated by collision with a small pendulum. Stress-wave analysis has been used for flaw detection and quality control for decades, but its use for material identification and classification is less cited in the literature. Accurate wood species identification is a time consuming task for highly trained human experts. For this reason, the development of cost effective techniques for automatic wood classification is a desirable goal. Our proposed approach is fully non-invasive and non-destructive, reducing significantly the cost and complexity of the identification and classification process. [Copyright &y& Elsevier]

Abstract: Twenty years ago, the Spanish National Transplant Organization (NTO) started a management and organizational system, known as the Spanish Model, that has allowed the NTO to occupy a privileged world position regarding deceased donation rates, which have been 33–35 donors per million population in recent years. One of the key elements of this model is its instructional approach. Two years ago, the NTO started the project “educ@nt” in close collaboration with the e-UCM research group of the University Complutense of Madrid to support and maximize its successful professional training system. As a result, 3 game-like simulations have been developed representing the different procedural steps of the suprahospital level of the transplantation process. These simulations represent the donor and organ evaluation, the allocation of organs applying the corresponding geographic and clinical criteria, and the logistics of transportation. Simulations are based on 10 representative teaching cases that help students become familiar with the most common cases arriving in the NTO. For the 2nd consecutive year, these simulations have been used in different courses around Spain. [Copyright &y& Elsevier]

In this work a simple technique to obtain information about the species of wood samples using stress-wave sounds in the audible range is presented. However, spectra of wood sounds generated by pendulum impact are very complex and feature extraction for classification purposes is very difficult. Polyspectral techniques have been successfully applied to several problems from radar pattern recognition to medical signal processing. Following this approach, convolution of four different sound impacts has been done. This permits to extract clear polyspectral features suitable for wood species recognition with possible applications to both human assisted and automatic wood identification systems with minimal intersample variability. Results indicate that using this technique only the two most intense polyspectral peaks are enough for species recognition. [ABSTRACT FROM AUTHOR]

A nondirected altruistic living kidney donor is a person who wants to donate a kidney to anyone in need. In 2010, the Spanish National Transplant Organization developed a national protocol to make the assessment of every potential nondirected living kidney donor. The aim of this study was to describe the potential donor pool and its characteristics and the overall effect of the program. A retrospective analysis was performed using data from the Spanish National Registry of Transplant Activity, and the Nondirected Donors National Database, between 2010 and 2017. Data related to sociodemographic characteristics, main motivations toward donation, and causes of dismissal were collected from all potential donors. The assessment of each candidate was carried out in a step-by-step process based on the national protocol. Two hundred seventy-two people contacted us, showing interest in the nondirected kidney donation, only 203 people underwent the early triage, and 16 of them successfully completed the assessment proces s, representing 8% of the total. The main motivation toward anonymous donation (n = 161) was: social awareness (22%) and to improve the quality of life of other people (9%). One hundred eighty-two candidates did not proceed, due to medical and psychological contraindications (42%) or donor refusal after specific information about the donation process (33%). The number of utilized nondirected altruistic living donors was 13 out of 203 (6%) of the candidates who began the early triage. Twelve transplant chains and a direct donation were performed, which made 38 kidney transplants possible (2.9 transplants per nondirected donor). We have to continue working to optimize our program. Our next steps will be to review the evaluation process, to detect areas for improvement, to understand why we lost many possible donors, and to ascertain if any of the reasons could be avoided. [ABSTRACT FROM AUTHOR]

Purpose/objective(s): To elucidate the long-term outcomes in patients with choroidal melanoma who received episcleral brachytherapy with 125-I seeds; analyze cause-specific survival, metastasis-free survival and local control and establish the relationship between tumor size and metastases.Materials/methods: From May 2007 to February 2013, 88 patients classified according to American Joint Committee on Cancer guidelines underwent ultrasound-guided episcleral brachytherapy with a total prescribed dose of 72.40 Gy to the apex.Results: Among the included cases, 47.7% and 44.3% had a clinical tumor stage of T2 and T3, respectively. With a median follow-up of 84 (range 7-153) months, local control at 5 and 10 years was 100% and 95%, respectively. Among the 88 patients, 9 (10.2%) were enucleated after brachytherapy. Those with T1-T2 and T3-T4 disease had a 10-year cause-specific survival of 100% and 87.3%, respectively (P = 0.017). Metastasis-free survival at 5 and 10 years was 100% in those with T1-T2 disease and 92.1% and 83.1% in those with T3-T4, respectively (P = 0.016). Five patients had liver metastases, all of whom had T3-T4 disease.Conclusion: Ultrasound-guided episcleral brachytherapy with 125-I seeds yielded excellent local control for choroidal melanoma, with low complication rates and 90% eye preservation. Given the association between tumor stage and liver metastases, which remain the main cause of death, stricter control should be employed for T3-T4 tumors for the early detection and treatment of relapses.Author Disclosure: B. Quiles Hevia: None. J. Mataix: None. J. Guinot: None. V. De los Dolores: None. M. Pena: None. A. La Rosa: None. M. Tortajada: None. M. Santos: None. P. Santamaria: None. S. Canós: None. M. Chust: None. J. Mengual: None. Y. Murria: None. M. Perez: None. C. Pesudo: None. L. Arribas Alpuente: None. [ABSTRACT FROM AUTHOR]