• Corrigendum to “Unveiling Injustice: Analyzing Child Mortality Inequality across decades in Peru (1981–2017)” [World Dev. 197 (2026) 107198] (World Development (2026) 197, (S0305750X25002840), (10.1016/j.worlddev.2025.107198))

  Huaroto, César; Francke, Pedro; Vivas, Claudia (Elsevier Ltd, 2026-07-01)

  The authors regret that, in the originally published version, the Funding and Acknowledgments statements were incomplete and could be misinterpreted regarding sources of support. We clarify that the research was funded by the Pontificia Universidad Católica del Perú (PUCP) through its CAP program, and that publication/dissemination activities received post-hoc support from the Universidad Peruana de Ciencias Aplicadas (UPC) via its EXPOST incentive. The corrected statements are reproduced below to replace the originally published versions. No other part of the manuscript is affected; the scientific results and conclusions remain unchanged. The authors would like to apologise for any inconvenience caused. Funding statement This research was funded by Pontificia Universidad Católica del Perú (PUCP) through the CAP Program 2023. Publication and dissemination received support from Universidad Peruana de Ciencias Aplicadas (UPC) via the UPC-EXPOST-2025 incentive. In addition, the authors did not receive any financial support that could be perceived as creating a potential conflict of interest. Spanish version: Esta investigación fue financiada por la Pontificia Universidad Católica del Perú (PUCP), a través del Programa CAP 2023. La publicación y difusión de este artículo recibieron apoyo de la Universidad Peruana de Ciencias Aplicadas (UPC) mediante el incentivo UPC-EXPOST-2025. Adicionalmente, los autores no han recibido ningún apoyo financiero que pueda considerarse fuente de conflicto de interés. Acknowledgments We gratefully acknowledge funding from the Vice-Rectorate for Research at Pontificia Universidad Católica del Perú (PUCP). We also thank the Research Direction of Universidad Peruana de Ciencias Aplicadas for support to the publication and dissemination of this research through the UPC-EXPOST-2025 incentive. We thank Camila Gianella, Walter Mendoza, Juan León, and participants at the PEA 2024 and ECINEQ-LAC 2024 conferences, the Internal Seminar of the PUCP Department of Economics, and the Summer Institute of TREES at Universidad de los Andes (Colombia) for their valuable comments and suggestions. We are especially grateful to Josué Benites for support during the early stages of this project and to Barbara Fraser for editorial assistance. We also benefited from the helpful comments of three anonymous reviewers. Additionally, we acknowledge the use of OpenAI's ChatGPT and Grammarly for language editing and writing support during the preparation of this manuscript. All errors are our own. Spanish version: Agradecemos el financiamiento del Vicerrectorado de Investigación de la Pontificia Universidad Católica del Perú (PUCP). A la Dirección de Investigación de la Universidad Peruana de Ciencias Aplicadas por el apoyo brindado para la difusión de este trabajo de investigación a través del incentivo UPC-EXPOST-2025. Agradecemos a Camila Gianella, Walter Mendoza, Juan León y a los participantes de los congresos PEA 2024 y ECINEQ-LAC 2024, del Seminario Interno del Departamento de Economía de la PUCP y del Summer Institute de TREES en la Universidad de los Andes (Colombia), por sus valiosos comentarios y sugerencias. Expresamos un agradecimiento especial a Josué Benites por su apoyo en las etapas iniciales del proyecto y a Barbara Fraser por la asistencia editorial. También agradecemos los comentarios de tres revisores anónimos. Adicionalmente, reconocemos el uso de OpenAI's ChatGPT y Grammarly para apoyo en la edición de lenguaje y la redacción durante la preparación de este manuscrito. Todos los errores son de nuestra entera responsabilidad.
• 

  Primary treatment of fishery wastewater using chemical and natural coagulants

  Nuñez Chacca, Moesha Anayely; Arrieta, Avertina Gabriela León; Ruiz-Huaman, Carmen Milagros; Cotrina, Enit Huamán (Polskie Towarzystwo Inzynierii Ekologicznej (PTIE), 2026-01-01)

  The Peruvian fishing industry is responsible for generating large volumes of effluents, whose treatment is complicated due to their high content of salts, organic matter and total suspended solids (TSS). The coagulation-flocculation method, utilizing chemical agents, has been employed for this purpose due to its efficacy. However, given that its use has negative impacts on health and the environment, the search for sustainable alternatives is a priority. In that sense, the objective of this study was to evaluate the efficacy of natural coagulants (chitosan and Moringa oleifera seeds powder) and chemicals (ferric chloride) to reduce total dissolved solids (TDS) in fishery wastewater. To that end, coagulant solutions were prepared, wastewater samples were collected to perform jar tests based on the established operating conditions, and finally, the reduction percentages were calculated. The results showed that natural coagulants are more effective than chemical coagulants to reduce TDS. Specifically, the application of chitosan and Moringa oleifera seeds powder generated maximum reductions of 98 ± 0.71% and 86.98 ± 1.92%, respectively, at a dose of 160 mg/0.5 L, while ferric chloride produced a maximum decrease of 83.64 ± 0.14% at a dose of 120 mg/0.5 L. Therefore, those findings support the idea that natural coagulants represent an effective and sustainable way to reduce physicochemical parameters from water.
• Interregionalism without automatic integration: European Union influence and political mediation in Mercosur

  Jimenez Soto, Andree Juvenal; Jimenez Mendoza, Wilber; Moscoso Cuaresma, Julio Ricardo; Nunez-del-Prado, Miguel; Alatrista-Salas, Hugo (Routledge, 2026-01-01)

  This study empirically analyses the interregional influence of the European Union (EU) on Mercosur's economic integration between 1995 and 2024, explicitly incorporating the conditioning role of Mercosur's internal political context. Moving beyond normative assumptions of integration as an automatic institutional outcome, the study conceptualises integration as an observable variable through the construction of a Mercosur Economic Integration Index (MEI) based on a structural gravity framework. Methodologically, it adopts a mixed longitudinal design combining: (i) a geographical influence model capturing EU hard, soft, and independent power; (ii) a Bayesian causal impact model to assess political transitions; and (iii) a structural gravity econometric model to evaluate intraregional integration. Results indicate that EU influence does not produce homogeneous effects. On average, stronger European influence is associated with lower intraregional integration, suggesting external anchoring dynamics. However, this effect is significantly moderated by favourable internal political configurations, under which European influence may align with integration objectives. The findings highlight the politically contingent nature of interregional influence and underscore the importance of political economy perspectives in regional integration analysis.
• Order Fulfillment Improvement Model Applying MRP, SLP with Digital Twins and Standardization Integrated with Poka Yoke in a Company in the Metalworking Sector

  Peña-Mendoza, Luis Enrique; Alvarez-Arteaga, José Luis; Coila-Ruiz, Cintya Rosmeri; Zarate-Muñoz, Eros (Springer Science and Business Media B.V., 2026-01-01)

  The metalworking industry plays a fundamental role in the global economy. In this context, manufacturing companies in the metalworking sector with the Engineer to Order (ETO) and Make to Order (MTO) strategies have experienced significant growth in the industrial field. However, these companies face considerable challenges, one of them being delays in order delivery. These delays are due to multiple factors, including defective products, material shortages, and excessive travel times due to an inefficient distribution of work areas. In response to this problem, a model is proposed that integrates tools such as MRP (Material Requirements Planning), SLP (Systematic Design Planning) with Digital twins for plant redistribution, and process standardization techniques with Poka Yoke. The implementation of these tools seeks to optimize the production chain, reduce manufacturing times, and improve operational efficiency. The development of this model is measured with the On Time Delivery indicator, which seeks to go from 89% to 96%. This work not only seeks to address the specific challenges of the study company but aspires to become a replicable model to solve production flow difficulties and improve punctuality in the delivery of orders throughout the metalworking industry.
• 

  Cardiac hydatidosis mimicking ischemic heart disease: A case report

  Chaponan-Lavalle, Andres; Cortegana, Cherie Quiroz; Velasquez, Luis Ivan Gordillo; Pizarro, Jaime Caceres; Diaz, Nelson; Alave, Jorge (Elsevier Ltd, 2026-01-01)

  Cystic echinococcosis (CE), caused by Echinococcus granulosus, is a zoonotic disease with cardiac involvement reported in less than 2 % of cases but associated with significant clinical challenges. We describe a 44-year-old woman from Peru who presented with exertional chest pain and T-wave inversions on electrocardiography. Imaging revealed a large multiloculated cystic mass with peripheral calcifications in the left ventricular wall, and Western Blot serology confirmed CE. The patient underwent surgical excision under cardiopulmonary bypass, followed by albendazole therapy. Histopathology confirmed a non-viable hydatid cyst. Postoperative recovery was uneventful, and she remained asymptomatic at 16-month follow-up. This case underscores the importance of considering cardiac hydatidosis in endemic regions when evaluating patients with angina-like symptoms in the presence of a cystic cardiac mass on imaging. Public awareness, improved medical education, and ongoing research are crucial to better managing this condition.
• 

  Motivational climate, self-determination, burnout, and mindfulness in adolescent football players from a professional academy in virtual settings

  Reyes-Bossio, Mario; Veran-Casanova, Natalia; de Rueda, Franco Ascenzo Bravo; Sánchez-Villena, Andy; Delgado-Campusano, Mariel; Tutte-Vallarino, Veronica; Brandão, Regina (Frontiers Media SA, 2026-01-01)

  Background: The COVID-19 pandemic shifted sports training to virtual formats, impacting athletes’ motivation, well-being, and mental health. In this context, motivational climate, self-determined motivation, mindfulness, and burnout are key factors for understanding adolescents’ psychological adjustment in football. Methods: This study employed a cross-sectional design, with all variables collected at a single time point during mandatory virtual training. This cross-sectional study surveyed 154 adolescent football players (M = 15.9 years) from a Peruvian professional academy during mandatory virtual training. Participants completed the EDMCQ-C, SMS, MAAS-5, and ABQ. A psychological network analysis was performed in R using non-regularized partial correlations and bootstrapped stability estimates. Results: An empowering climate was positively associated with intrinsic motivation and mindfulness, whereas a disempowering climate was linked to extrinsic motivation and burnout. Extrinsic motivation emerged as the most central node in the network, and mindfulness functioned as a bridging node that buffered the spread of demotivation toward exhaustion. The model showed adequate stability (CS = 0.44). Conclusion: Empowering motivational climates and mindfulness protect adolescents’ psychological wellbeing, whereas controlling coaching and extrinsic motivation heighten the risk of burnout. These findings support incorporating autonomy-supportive coaching and brief mindfulness practices in youth sport training and coach education programs.
• 

  LATERALLY POSITIONED FLAP TO TREAT DEEP ISOLATED GINGIVAL RECESSION IN A ROTATED TOOTH. A CASE REPORT

  Salazar, Evelyn; Vergara-Buenaventura, Andrea (Universidad Cientifica del Sur, 2026-01-01)

  Background: Complete root coverage (CRC) is the primary goal in the treatment of gingival recession defects. However, anatomical factors such as thin periodontal phenotype, limited keratinized tissue width, mucosal thickness, and tooth position can influence treatment prognosis. The laterally moved flap technique is recommended when keratinized tissue is absent apical to the recession defect, especially in malpositioned teeth. Methods: A 36-year-old woman presented with a Miller Class II (Cairo Recession Type 2) gingival recession defect on the buccal surface of a rotated tooth #24, characterized by absence of keratinized tissue and a thin gingival phenotype. A laterally moved coronally advanced flap combined with a connective tissue graft was performed to increase keratinized tissue and mucosal thickness prior to orthodontic treatment. Results: At 6 months post-surgery, the patient showed stable clinical conditions with 60% root coverage, significant gain of keratinized tissue (3 mm), and increased gingival thickness. Both donor and recipient sites demonstrated satisfactory healing without signs of inflammation. Conclusion: The combined use of a laterally moved coronally advanced flap with connective tissue graft is an effective mucogingival approach for managing deep gingival recession in rotated teeth with thin phenotypes. This technique enhances tissue thickness and keratinized tissue width, improving periodontal stability prior to orthodontic intervention.
• Diagnostic Performance of a Multiantigen Print ImmunoAssay (MAPIA) for Antibody Detection in Human Neurocysticercosis

  Toribio, Luz M.; Guzman, Carolina; Vasquez, Alessandra; Saavedra, Herbert; Gonzales, Isidro; Bustos, Javier A.; García, Hector H. (Oxford University Press, 2026-01-01)

  Background Neurocysticercosis (NCC) is the most prevalent helminth infection affecting the human central nervous system. Although neuroimaging is required for definitive diagnosis, serology supports case confirmation and clarifies diagnostic doubts. Serology gold standard is antibody detection using the enzyme-linked immunoelectrotransfer blot assay, which uses 7 antigenic lentil-lectin purified parasite glycoproteins (LLGP-EITB). LLGP-EITB is poorly accessible to low-resource settings due to its technical complexity and costs, and it is inaccessible in many settings in which parasitic material to produce antigens is not readily available. We recently developed a 3-Antigen multiantigen print immunoassay (MAPIA) based on recombinant/synthetic antigens (rGP50, rT24H, and sTs14), corresponding to the 3 principal diagnostics antigenic families from LLGP-EITB, that is simpler and does not require parasite-derived materials. Methods MAPIA performance was evaluated using a well-defined set of serum samples from NCC patients confirmed by imaging, including 73 samples from subarachnoid NCC, 72 with >5 parenchymal cysts, 59 with 3-5 parenchymal cysts, 95 with 1-2 parenchymal cysts, and 77 healthy negative controls and compared it with the LLGP-EITB performance. Results Overall, our MAPIA presented a sensitivity of 97.7% and a specificity of 97.4%. Subgroup analyses by NCC type demonstrated a sensitivity of 100% for subarachnoid and parenchymal NCC with >5 cysts and a slight decrease for the groups with 3-5 cysts (96.6%) and 1-2 cysts (94.7%). Observed agreement with the LLGP-EITB assay was 98.33%. Conclusions Our 3-Antigen MAPIA obtained comparable results to LLGP-EITB and emerges as a simpler, reproducible, and easy-Access alternative tool for antibody diagnosis in NCC.
• Taenia solium neurocysticercosis: lts current epidemiological, diagnostic, therapeutic, and control landscapes

  Bustos, Javier A.; Coyle, Christina M.; Thakur, Kiran T.; Guzman, Carolina; Toribio, Luz M.; Arroyo, Gianfranco; Saavedra, Herbert; Mwape, Kabemba E.; Rajshekhar, Vedantam; Garcia, Hector H.; the Cysticercosis Working Group in Peru (cwgp) (Public Library of Science, 2026-02-01)

  Neurocysticercosis is the most common helminthic parasitic disease affecting the human central nervous system and is pleomorphic in its presentation. It is frequently encountered in daily practice in most parts of the world, and also commonly seen in industrialized countries in immigrant populations. In the past decade, new treatment (combined anti-parasitic drugs, increased attention to reducing treatment-associated inflammation and damage, new surgical strategies), and diagnostic (more specific antigen and antibody detection concepts and tools, more sensitive magnetic resonance imaging sequences) approaches, new animal models, and data on control of transmission have emerged. Still, diagnostic challenges persist and treatment approaches for some types of disease may differ, affecting clinical practice. This review provides clinicians in endemic and non-endemic countries with a comprehensive and practical reference to understand the variabilities in clinical expression of the disease and the optimal diagnostic and treatment approaches.
• On the need for patient-centered approaches to Helicobacter pylori management in geriatric populations

  Badell, Camila S.; Ruiz, Eloy F. (Ediciones Doyma, S.L., 2026-03-01)

  El artículo examina críticamente la pertinencia de adoptar enfoques centrados en el paciente en el tratamiento de la infección por Helicobacter pylori en adultos mayores, subrayando la necesidad de integrar variables clínicas, comorbilidades y factores de calidad de vida en la toma de decisiones terapéuticas.
• Oncoplastic Approach to Juvenile Giant Fibroadenoma: A Case Series

  Chávez Díaz, Marcelo; de La Cruz Ku, Gabriel; Cedrón Lenci, Carla Carina; Cueva Perez, Maria del Rosario (Galenos Publishing House, 2026-04-01)

  Juvenile giant fibroadenoma (GFA) is defined as a benign tumor larger than 5 cm, 500 grams, and/or involving at least 80% of the breast. It typically occurs in young patients and causes breast deformity and asymmetry. Surgical treatment involves resection of the tumor (enucleation), rearrangement of the skin envelope, and repositioning of the nipple-areola complex. However, the expected re-expansion of the breast following tumor removal, often managed through periareolar approaches, can be unpredictable and prolonged in certain cases. For this reason, oncoplastic surgery techniques have been developed, which allow for immediate partial reconstruction and are now among the available therapeutic options. This report describes three cases in which an oncoplastic approach was used for the treatment of GFA.
• CLO26-131: Hematologic-IHC Prognostic Score for Therapeutic Prioritization in Breast Cancer: Multicenter Validation in Peru (2010-2020)

  Malpartida, Robert; Benites, Vladimir; Malpartida, Jesús Miguel; Matos, Joseph; Leiva, Silvia; Arroyo, Jorge Luis (Journal of the National Comprehensive Cancer Network : JNCCN, 2026-03-31)

  Introduction: Early treatment selection in breast cancer is often delayed in Latin America due to limited access to advanced biomarkers. We propose an accessible score based on baseline complete blood count and standard immunohistochemistry (IHC) to stratify risk at first consultation. Objective: To internally develop and validate a hematologic–IHC prognostic score to estimate 5-year overall survival. Methods: Multicenter retrospective cohort across four public hospitals in Lima-Peru (2010–2020). A total of 883 patients with histologic confirmation, baseline blood counts and complete IHC (ER, PR, HER2, Ki-67) were included. The Hematologic–IHC Prognostic Score (SPHIQ) integrates six routinely available clinicopathologic and hematologic parameters, yielding a total score ranging from 0 to 12 points: PIV: <250 (0), 250–399 (1), ≥400 (2); PLR: <150 (0), 150–199 (1), ≥200 (2); Hemoglobin (g/dL): >12 (0), 11–12 (1), ≤11 (2); Stage: I–II (0), III (1), IV (2); Histologic grade: G1 (0), G2 (1), G3 (2); Molecular subtype: Luminal A (0), Luminal B (1), HER2+/HR- or TNBC (2). The cumulative SPHIQ score reflects tumor biological aggressiveness, where higher scores correlate with poorer prognosis. This integrated index enables early pre-consultation risk stratification by combining systemic inflammation, hematologic status, and molecular subtype into a single, reproducible prognostic tool. Risk groups: low 0–4, intermediate 5–8, high 9–12. Statistics: Kaplan–Meier, log-rank, multivariate Cox, bootstrap, AUC and C-index. Results: Risk distribution: low n=290 (32.8%), intermediate n=394 (44.6%), high n=199 (22.5%). 5-year OS: 83%, 61% and 34% (log-rank p<0.001). Independent predictors of lower OS: * PIV≥310 aHR 4.94 (95%CI 1.59–15.38; p=0.006) * PLR≥150 aHR 2.33 (95%CI 1.22–4.44; p<0.05) * Triple-negative and HER2+ HR-negative with worst prognosis Model performance: C-index 0.72, AUC 0.71. Calculation time: <5 minutes in clinic. Conclusion: SPHIQ enables immediate prognostic stratification using standard CBC and IHC, optimizing therapeutic prioritization and resource allocation in Latin American healthcare systems.
• Safety and clinical outcomes of mechanical thrombectomy for acute stroke in pregnant patients: A systematic review

  Calisaya-Madariaga, Irving Gabriel; Carbajal-Galarza, Meiling; Castillo-Granda, Jhosely Ibeth; Abanto-Florez, Leonardo Marcelo; Navarro Salcedo, Maria Fernanda; Suárez Rodríguez, José Alejandro; Ramos Maguiña, Edward Sebastian; Meca-Bayona, Matias Daniel; Pacheco-Barrios, Niels; Acurio-Ortiz, Karlos (BMJ Publishing Group, 2026-01-01)

  Mechanical thrombectomy (MT) is an established and guideline-endorsed treatment for acute ischemic stroke (AIS) due to large vessel occlusion. Intravenous thrombolysis (IVT) with alteplase remains the first-line therapy within the approved time window, often used alone or as a bridging strategy before MT. However, both interventions have been systematically understudied in pregnant patients, as this population has been excluded from most pivotal clinical trials. This systematic review critically evaluates the procedural feasibility, safety, and maternal-fetal outcomes of MT in pregnant patients experiencing AIS. A comprehensive literature search using PubMed, Embase, and Web of Science yielded 16 studies encompassing 26 cases. In 20 of these, the occlusions involved the M1 segment of the middle cerebral artery, with 58% receiving combined IVT and MT, and 42% undergoing MT alone. Successful reperfusion (TICI 2b-3) was attained in 84% of cases. The median times were 120 min from onset to hospital arrival, 92 min from arrival to puncture, and 330 min from onset to recanalization. Favorable maternal outcomes (mRS 0-1) were observed in 91% of cases at follow-up, and no direct MT-related fetal mortalities occurred. Radiological protection practices, though inconsistently reported, commonly included abdominal shielding and optimized fluoroscopic protocols. Despite limited high-level evidence, MT in pregnancy appears technically feasible and clinically beneficial, warranting prompt multidisciplinary coordination and robust imaging protocols. Future prospective research is essential to better define safety parameters and optimize guidelines for this vulnerable subgroup of patients.
• Exploring the Seismic Performance of Confined Brick Masonry Walls via Diverse Toothing Connections: A Numerical Investigation

  Shandilya, A. N.; Haldar, A.; Yacila, Jhair; Mandal, S. (American Society of Civil Engineers (ASCE), 2026-02-01)

  Confined brick masonry (CBM) combines masonry walls with reinforced concrete ties for enhanced structural integrity. The wall-to-tie connection is essential for effective load transfer, preventing out-of-plane failure, and enhancing ductility. Introducing tie-columns into masonry walls through various toothing connections is crucial. However, previous research and guidelines do not provide clear insights into their specific contributions, making it difficult to accurately assess their impact. Addressing this gap, our study employed a robust numerical approach, utilizing an integrated finite element macromodel that treated wall and tie members as a single entity, thereby improving computational efficiency. Additionally, the study applied the concrete damage plasticity model to predict damage progression in CBM walls and performed pushover analysis to evaluate the seismic performance of various toothing schemes in CBM walls. An extensive parametric study was conducted to compare various toothing schemes, evaluate the optimal horizontal and vertical projections of tooth, assess the impact of height-to-thickness ratio on toothing schemes, and investigate the effect of openings on the performance of toothing schemes in CBM walls. This research also assessed the severity of damage encountered by CBM walls, providing insights into crack propagation and distribution and emphasizing the significance of its design. This study highlights the critical role of toothing schemes in the seismic performance of CBM walls, with the machine-made toothing schemes demonstrating superior results. These schemes significantly enhanced ultimate strength, stiffness, and energy absorption compared to handmade, horizontal reinforcement, and no-tooth options. The research also quantified the positive correlation between increased wall thickness and improved structural resilience, particularly when paired with machine-made toothing. Furthermore, the study identified the adverse effects of wall openings on seismic performance, emphasizing the importance of precise tooth size and arrangement. Notably, a 100-mm vertical projection was shown to offer the most effective seismic performance, providing valuable, data-driven guidelines for the design of earthquake-resistant CBM structures.
• Enhancing Minimarket Customer Experience Through YOLOv8-Powered Checkout Systems

  Arana-Del-Carpio, Sebastian; Becerra-Bisso, Luis; Ugarte, Willy (Springer Science and Business Media Deutschland GmbH, 2026-01-01)

  In Lima, Peru, minimarkets are vital, providing essential goods to a growing population. However, slow payment processes lead to long lines and frustrated customers, impacting satisfaction and profitability. The main issue is the slow, error-prone manual item scanning at the checkout. Addressing this inefficiency can enhance economic impact, customer satisfaction, and operational efficiency. Despite the benefits, implementing object detection technology faces challenges such as technological complexity, integration issues, diverse product ranges, and high costs. Previous solutions failed due to inadequate technology, high costs, poor integration, and user resistance. This paper proposes using YOLOv8, a state-of-the-art object detection model, for its precision, real-time processing, cost-effectiveness, and easy integration. This work includes custom hardware, an integration layer, and a user interface, with the aim of reducing checkout times, achieving over 94% product recognition accuracy, and improving customer satisfaction. Initial tests show promising results in speed, accuracy, and customer feedback.
• IoT System Based on Deep Learning for the Identification and Feedback of Work Postures When Using a Computer

  Caballero-Lara, Eduardo; Camargo-Ramirez, Enzo; Ugarte, Willy (Springer Science and Business Media Deutschland GmbH, 2026-01-01)

  It is common for office workers, mostly dedicated to IT, to present musculoskeletal pain in the back, neck and shoulders due to poor posture practices they adopt while doing their work in front of the computer for long periods, this is known as forced postures. Our main work seeks to implement an IoT system with force sensors, model RP-S40-ST, based on the use of classification algorithms and deep learning techniques for the identification and correction of postures through feedback. Ten classification algorithms were used for training and validation of the model, with the Logistic Regression algorithm achieving the highest accuracy rate being .8794 and .9052 respectively.
• Mitigating Information Leakage in Tech-Sector SMEs: Implementing ISO 27001:2022 for Comprehensive Security

  Quispe, Gabriel O.; Zuloaga, Cesar K.; Castañeda, Pedro S. (Springer Science and Business Media Deutschland GmbH, 2026-01-01)

  This paper presents a model for implementing an Information Security Management System (ISMS) based on ISO 27001:2022 tailored to the needs of small and medium-sized enterprises (SMEs) in the technology sector in Lima Metropolitana. The model focuses on mitigating data leakage, a critical issue exacerbated by the increasing digitization of business operations. The proposed framework integrates controls from ISO 27001 aligned with NIST SP 800-53 to enhance information security practices. Results from applying the model to two technology SMEs indicate that one company (Company A) achieved a 94.44% Critical Control Implementation Index (IICC), a 70% Critical Vulnerability Resolution Rate (TRVC), and an 85% Policy Compliance Rate (TCPS), while the second company (Company B) achieved significantly lower rates of 50%, 40%, and 60%, respectively. These findings highlight both strengths in technological controls and weaknesses in organizational security management. This research contributes to the field by providing a practical, scalable approach for SMEs to enhance their information security posture, addressing both human and technological factors.
• Unveiling Injustice: Analyzing Child Mortality Inequality across decades in Peru (1981–2017)

  Huaroto, César; Francke, Pedro; Vivas, Claudia (Elsevier Ltd, 2026-01-01)

  Peru is a developing country that has significantly improved the average of almost all health indicators. Specifically, in the past four decades, child mortality decreased tenfold. However, the same is not necessarily true of equality, which remains a challenge. Using microdata from Peru's population censuses in 1981, 1993, 2007, and 2017, we estimate the inequality in child mortality across different social groups. We estimate differences between ethnic groups, education levels, wealth quintiles, regions, and urban–rural groups and find that although inequality has decreased, it remains significantly high. The data show that inequality in child mortality increased between 1981 and 1993, declined between 1993 and 2007, and then increased between 2007 and 2017. Differences in education are the most crucial factor, associated with 45 % of the inequality in 1981 and 58 % in 2017. Differences between Lima and rural areas account for 27 % to 30 % of the inequality, while ethnicity contributes only 6 % in 1981 and 10 % in 2017.
• A Thorough Evaluation of Demand Prediction Models: Machine Learning, Deep Learning, and Statistical Techniques for Import Businesses

  Julca-Mejia, Wilson; Julca-Mejia, Annie (Springer Science and Business Media Deutschland GmbH, 2026-01-01)

  Nowadays, managing demand in companies is crucial to avoid storage overcosts, stockouts and to improve the service level of companies. To address this scenario, demand predictions through models and algorithms emerge. Therefore, this research aims to evaluate the performance of seven prediction techniques applying machine learning, deep learning, and statistical methods. To validate our experiments, we used Dickey–Fuller, Shapiro–Wilk, Friedman, and Wilcoxon post-hoc statistical tests on the predictions of the models using demand records from a Peruvian import company. The results indicated that deep learning and statistical models have significantly better predictions than machine learning models. In particular, the LSTM, CNN, ARIMA, and Holt-Winters models significantly improve accuracy compared to the Ridge Regression, Random Forest Regressor, and Decision Tree Regressor models. Compared to machine learning models, statistical and deep learning models improve accuracy in a range from 66.01 to 86.10%. These results highlight the statistical advantage of deep learning and statistical models in demand prediction, with the LSTM model showing the lowest error.
• Patients with Chronic Kidney Disease and Advance Health Care Directive Registration

  Díaz-Cárdenas, David; Gallardo-Echenique, Eliana (Springer Science and Business Media Deutschland GmbH, 2026-01-01)

  Advance healthcare directives planning entails the development of an understanding, reflection and communication process among patients, family members and healthcare team to accurately clarify patients’ preferences and identify surrogates, especially in end-of-life scenarios. The purpose of this study was to analyse the perceptions of patients with chronic kidney disease undergoing haemodialysis at Hospital Abraham Godoy Peña de Lautaro regarding the intention to register their advance healthcare directive. A phenomenological approach was applied to understand the meaning of the experiences of the subjects involved. Theoretical sampling was used, and 14 semi-structured interviews were conducted. Data were processed using thematic analysis. Patients with stage 5 chronic kidney disease undergoing haemodialysis were aware of the importance of advance healthcare directive registration; however, the registration process and should be guided by values-based education techniques. Interviewees prefer therapies aligned with their lifestyles, family impact, psychological comfort, and inclusion, rather than focusing solely on clinical results.

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