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1.
Cell Tissue Bank ; 2024 Jun 26.
Artículo en Inglés | MEDLINE | ID: mdl-38926207

RESUMEN

A high success rate of corneal transplants is evident. However, there is still a lack of corneal grafts available to meet demand, largely because donors are reluctant to donate. Given their critical role in future healthcare teaching and advocacy. There has not been much research on Jordanian nursing students' perspectives on corneal donation, so it's critical to identify and eliminate any obstacles. This study aims to evaluate the knowledge and attitudes of Jordanian nursing students concerning corneal donation. A cross-sectional, descriptive design was used to recruit (n = 440) nursing students from four Jordanian universities. A self-reported questionnaire was used to obtain data on knowledge and attitudes regarding corneal donation. The average age of senior nursing students was (M = 23.07, SD = 3.63) years. Varying levels of understanding were revealed amongst university students toward corneal donation items. Generally, good attitude of nursing students toward corneal donation (M = 34.1, SD = 8.1). Weak positive relationship was found between total knowledge scores and age (r = 0.141, p = 0.003) while there is no significant relationship between age and total attitude score (r = 0.031, p = 0.552). Age was found to be a significant predictor (B = 0.01, Beta = 0.12, t = 2.07, p = 0.04). Also, the educational level of fathers is a significant positive predictor (Beta = 0.128, p = 0.008) for the total attitude scores among nursing students. Limited awareness of corneal donation, highlighting the need for focused educational interventions to improve their comprehension.

2.
Artículo en Inglés | MEDLINE | ID: mdl-38922997

RESUMEN

OBJECTIVES: The Asian American (AsA) population is at high risk for poor oral health outcomes and remains an underserved and understudied community. Low oral health literacy could explain poor oral health behaviours, practices and outcomes in this population. The aims were as follows: (i) provide a scoping review of oral health literacy, knowledge, practice and beliefs among AsA individuals residing in the United States; (ii) identify any instruments or tools translated into participants' language and (iii) determine whether the translated instruments had been assessed for validity and reliability. METHODS: The current study used a scoping review framework based on PRISMA-ScR that included rigorous eligibility criteria, search strategy, independent selection process with adjudication, and standardized reporting of outcomes. The search was conducted on March 14, 2022, and updated on February 25, 2023 and February 13, 2024, in the following databases: Ovid MEDLINE, Embase, Web of Science and CINAHL. Peer-reviewed original research on oral health literacy, knowledge, awareness, practice, and beliefs related to oral health care in AsA subgroups published in English were included. Two reviewers independently assessed whether titles and abstracts should be included for review, with discrepancies adjudicated by a third reviewer. Data extracted from articles used a standard template that included study design, and measurement tools of oral health, knowledge, awareness, practice and beliefs, as well as results and conclusions of the publication. In addition, the template captured whether the translated and original measurement tools were assessed for reliability and validity. RESULTS: Of the 367 papers identified, 10 studies that met eligibility criteria were included in the final review. Of these, four studies used previously validated tools to assess oral health measurements in AsA. Only five of the studies translated the tools into the participants' native language. Although AsA exhibited lower oral health literacy than Whites but higher than Hispanics and African Americans, none of the translated tools were assessed for reliability and validity. Acculturation and country of birth were factors influencing oral health behaviours related to good oral health practice and utilization, with AsA born in the United States exhibiting higher oral health utilization than those born in their country of origin. Oral health beliefs played a significant role in dental care utilization among AsA populations. CONCLUSIONS: The scoping review on oral health in Asian American communities identifies a significant research gap, particularly in the lack of validated tools for assessing oral health literacy, which varies across ethnic groups. It notes that AsA generally have lower oral health literacy compared to Whites, but higher than Hispanics and African Americans. AsA born in the United States shows better oral health practices, influenced by acculturation and birth country. The findings emphasize the need for more thorough and culturally adapted research methods to address oral health disparities in this diverse group.

3.
J Environ Manage ; 361: 121220, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38805963

RESUMEN

On the one hand, economies, particularly developing ones, need to grow. On the other hand, climate change is the most pressing issue globally, and nations should take the necessary measures. Such a complex task requires new theoretical and empirical models to capture this complexity and provide new insights. Our study uses a newly developed theoretical framework that involves renewable energy consumption (REC) and total factor productivity (TFP) alongside traditional factors of CO2 emissions. It provides policymakers with border information compared to traditional models, such as the Environmental Kuznets Curve (EKC), being limited to income and population. Advanced panel time series methods are also employed, addressing panel data issues while producing not only pooled but also country-specific results. 20 Renewable Energy Country Attractiveness Index (RECAI) nations are considered in this study. The results show that REC, TFP, and exports reduce CO2 emissions with elasticities of 0.3, 0.4, and 0.3, respectively. Oppositely, income and imports increase emissions with elasticities of 0.8 and 0.3. Additionally, we show that RECAI countries are commonly affected by global and regional factors. Moreover, we find that shocks can create permanent changes in the levels of the factors but only temporary changes in their growth rates. The main policy implication of the findings is that authorities should implement measures boosting TFP and REC. These factors are driven mainly by technological progress, innovation, and efficiency gains. Thus, they can simultaneously reduce emissions while promoting long-run green economic growth, which addresses the complexity mentioned above to some extent.


Asunto(s)
Contaminación del Aire , Dióxido de Carbono , Desarrollo Económico , Política Ambiental , Energía Renovable , Carbono , Dióxido de Carbono/análisis , Contaminación del Aire/economía , Contaminación del Aire/estadística & datos numéricos , Cambio Climático
4.
SAGE Open Nurs ; 10: 23779608241252249, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38746075

RESUMEN

Introduction: Bedside nurses in the intensive care units are exposed to multiple challenges in their regular practice and recently have taken in ventricular assist device care in Lebanon since its introduction as a fairly new practice. Objectives: To explore the experiences of nursing staff who work in Lebanese hospitals with Left Ventricular Assist Devices (LVAD). Methods: This study employed a qualitative phenomenological research design, where semi-structured interviews were carried out among fifteen LVAD nurses in an acute care hospital. Results: The qualitative data analysis produced six main themes. The first theme prevalent was "LVAD incompetence and shortage" and it reflected the deficit in properly structured training and the number of specialized LVAD nurses. The second theme that resulted from the analysis was titled, "Patient and family knowledge", which indicated the misconceptions that families and patients usually hold about LVAD which usually sugarcoats the situation. This was followed by "Burden of complications", "LVAD patient selection", "Perception of the LVAD team as invulnerable", and "High workload and patient frailty" which reflected the perspectives of LVAD nurses. Conclusion: This study shows that the Lebanese LVAD nurses who participated in this study perceived inadequate competence, yet lacked proper training and induction. The nurses reported multiple challenges relating to care tasks, workload, and patient and family interactions which need to be addressed by coordinators.

5.
Cancers (Basel) ; 16(6)2024 Mar 10.
Artículo en Inglés | MEDLINE | ID: mdl-38539447

RESUMEN

Serpins are serine proteinase inhibitors, with several serpins being overexpressed in cancer cells. Thus, we aim to analyze the single-nucleotide polymorphism (SNP) of Serpinb11 and its association with GBM survival. A cohort of 63 GBM patients recruited from King Abdullah University Hospital in Jordan underwent polymorphism analysis and overall survival (OS) assessments. The Cancer Genome Atlas (GBM) cohort was useful for validation. We constructed a risk score using the principal component analysis for the following Serpin genes: Serpinb3, Serpinb5, Serpinb6, Serpinb11, and Serpinb12, and patients were grouped into high- vs. low-risk groups based on the median cutoff. Univariable Cox models were used to study the survival outcomes. We identified a significant association between rs4940595 and survival. In the TCGA cohort, Serpinb3 alterations showed worse OS. Univariable Cox showed worse PFS outcomes with higher SERPINB5 and SERPINB6 expression. A Serpin B 5-gene risk score showed a trend towards worse PFS in the high-risk group. Upregulated DEGs showed GO enrichment in cytokine regulation and production, positive regulation of leukocyte activation, and the MAPK cascade. The high-risk group showed a significantly higher infiltration of M2 macrophages and activated mast cells. Our findings showed a significant role of the Serpin B family in GBM survival in the Jordanian population.

6.
SAGE Open Nurs ; 10: 23779608241240490, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38515525

RESUMEN

Introduction: In general, undergraduate university students in the north of Jordan have a low level of physical activity. Objectives: To examine the physical activity level, perceived barriers and benefits to physical activity, and the contributing factors among university students in north of Jordan. Methods: A cross-sectional study design was used, and data was collected from 235 university students through a self-reported questionnaire. The International Physical Activity Questionnaire (IPAQ) was utilized to calculate the amount of physical activity, while the exercise benefits and barriers scale (EBBS) was used to measure the perceived benefits and barriers of physical activity. Results: According to the findings, less than half of the students (48.1%) reported engaging in physical activity. Several factors were found to be significantly related to higher levels of physical activity, including being younger, single, having a normal body weight, and reporting excellent health status. Logistic regression analysis revealed that overweight (OR = -0.068, 95% CI 0.025-0.183) and obese (OR = -0.250, 95% CI 0.068-0.924) were less likely to be physically active, while those who rated their health as excellent had higher rates of physical activity (OR = 3.590, 95% CI 1.263-10.201). The students agreed most strongly with the perceived benefit item "Exercise improves the way my body looks," while the perceived barrier item they identified most strongly with was "There are too few places for me to exercise." Conclusion: This study provides important data for health promotion programs aimed at supporting physical activity among university students.

7.
Hum Brain Mapp ; 45(2): e26610, 2024 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-38339895

RESUMEN

The higher brain functions arise from coordinated neural activity between distinct brain regions, but the spatial, temporal, and spectral complexity of these functional connectivity networks (FCNs) has challenged the identification of correlates with neurobehavioral phenotypes. Characterizing behavioral correlates of early life FCNs is important to understand the activity dependent emergence of neurodevelopmental performance and for improving health outcomes. Here, we develop an analysis pipeline for identifying multiplex dynamic FCNs that combine spectral and spatiotemporal characteristics of the newborn cortical activity. This data-driven approach automatically uncovers latent networks that show robust neurobehavioral correlations and consistent effects by in utero drug exposure. Altogether, the proposed pipeline provides a robust end-to-end solution for an objective assessment and quantitation of neurobehaviorally meaningful network constellations in the highly dynamic cortical functions.


Asunto(s)
Encéfalo , Imagen por Resonancia Magnética , Recién Nacido , Humanos , Encéfalo/diagnóstico por imagen , Mapeo Encefálico
8.
Iran J Nurs Midwifery Res ; 29(1): 120-124, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38333338

RESUMEN

Background: With an increase in elderly people, it is essential to address the issue of cognitive impairment and support healthy aging. This study aimed to assess cognitive impairment and factors associated with it among older adults. Materials and Methods: A cross-sectional study was carried out in different catchment areas within the Jerash governorate in the north of Jordan. The Elderly Cognitive Assessment Questionnaire (ECAQ) and a household face-to-face interview were used to collect data from 220 older adult participants aged 60 years and more. Descriptive statistics were conducted to describe the study variables. Correlation tests were applied to find associations between them. Logistic regression analysis was applied, with a minimum significance level (p < 0.05). Results: About 9.10% of the older adults had cognitive impairment. Cognitive impairment was correlated with age, self-perceived health, hypertension, stroke, and mental illness. The primary predictors of cognitive impairment were age [odds ratio (OR) =1.07 (1.01-1.14), p = 0.001] and stroke [OR = 10.92 (1.44-82.85), p = 0.001]. Conclusions: While many factors were correlated with cognitive impairment, the strongest predictors of cognitive impairment were age and stroke.

9.
Iran J Nurs Midwifery Res ; 29(1): 125-132, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38333350

RESUMEN

Background: Although breakfast skipping among university students is a significant concern, its prevalence and the contributing factors among university students have received little attention in the literature. This study aims to determine the prevalence of skipping breakfast among Jordanian university students and examine the associated factors and variations in rates of skipping breakfast by day of the week. Materials and Methods: A cross-sectional study was conducted among undergraduate students between March and May 2022 through a self-questionnaire. A convenience sample of 891 students was chosen at four Jordanian public universities. The data were analyzed using descriptive and inferential statistics. Results: The prevalence of skipping breakfast among university students was 66%. The reasons for skipping breakfast were having no time due to oversleeping and having no feeling of hunger (59% for both), followed by having no energy to prepare the breakfast and making no difference (49% and 48%), and not being able to afford to eat or buy breakfast (19%). There is a strong correlation between eating fast food and skipping breakfast. With whom the student eats breakfast is significantly associated with breakfast skipping, revealing that the highest percentages of skipping occur with friends. About 63% of students skipped breakfast through university days compared with 37% on the weekend, while 37% of them had breakfast through university days compared with 67% on the weekend. Conclusions: A high percentage of university students in Jordan skip breakfast. More attention should be paid to correlating factors and developing interventions to help students adhere to the breakfast.

10.
ScientificWorldJournal ; 2023: 5548694, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38021479

RESUMEN

Aims: This study evaluates the epidemiology of headache and migraine among adolescents aged 12 to 15. Methods: A school-based cross-sectional study was conducted to collect and analyze data from students in grades 7-10 over the course of one month, using a simple random sampling method. The overall number of participants in this study was 692, with an average age of 13.9 years (SD = 1.3). Descriptive measures and Fisher's exact test were computed. Multivariate regression was calculated to assess the predictors of headache and migraine. Findings. Approximately one-half of the students reported having headaches: tension-type headaches (10.3%), migraines (4.8%), and other headache types (31.5%). Moreover, girl students in the age group of 14-15 reported more headaches and migraines. Conclusion: The prevalence of headache and migraine in Jordan is high and increasing as students grow older. Health education programs led by school nurses and other healthcare practitioners are urgently needed.


Asunto(s)
Cefalea , Trastornos Migrañosos , Femenino , Humanos , Adolescente , Jordania/epidemiología , Prevalencia , Estudios Transversales , Encuestas y Cuestionarios , Cefalea/epidemiología , Trastornos Migrañosos/epidemiología
11.
Iran J Nurs Midwifery Res ; 28(5): 504-508, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37869694

RESUMEN

Background: Tracheostomy care is a standard procedure that nurses perform in Critical Care Units (CCUs) to reduce complications from tracheostomy. The literature indicates a clear variety of care and practice in managing tracheostomy patients within the healthcare system. This study was conducted to assess the knowledge level of tracheostomy care among nurses in CCUs in Jordanian hospitals. Materials and Methods: A cross-sectional descriptive design was used for this study. A convenience sample of 260 nurses working in the CCUs of four government hospitals completed a self-reported structured questionnaire. Data were collected from January 2021 to March 2021. A t-test and one-way Analysis of Variance (ANOVA) were used to assess the differences among socio-demographic variables in terms of knowledge score. Results: The result revealed that the level of knowledge was suboptimal. There was a statistically significant difference in the mean level of knowledge regarding tracheostomy care (in all dimensions) by age (F = 22.595, p < 0.001), educational level (F = 355.30, p < 0.001), and work experience (F = 13.63, p < 0.001). For gender, there was a statistically significant difference in knowledge of the tracheostomy suctioning dimension (p = 0.001). Conclusions: The level of knowledge among nurses regarding tracheostomy care was moderate, indicating an urgent need for education.

12.
Diagnostics (Basel) ; 13(17)2023 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-37685352

RESUMEN

Artificial intelligence (AI) methods applied to healthcare problems have shown enormous potential to alleviate the burden of health services worldwide and to improve the accuracy and reproducibility of predictions. In particular, developments in computer vision are creating a paradigm shift in the analysis of radiological images, where AI tools are already capable of automatically detecting and precisely delineating tumours. However, such tools are generally developed in technical departments that continue to be siloed from where the real benefit would be achieved with their usage. Significant effort still needs to be made to make these advancements available, first in academic clinical research and ultimately in the clinical setting. In this paper, we demonstrate a prototype pipeline based entirely on open-source software and free of cost to bridge this gap, simplifying the integration of tools and models developed within the AI community into the clinical research setting, ensuring an accessible platform with visualisation applications that allow end-users such as radiologists to view and interact with the outcome of these AI tools.

13.
Trans R Soc Trop Med Hyg ; 117(12): 867-874, 2023 12 04.
Artículo en Inglés | MEDLINE | ID: mdl-37681342

RESUMEN

BACKGROUND: The objective of this study was to evaluate the spatial and temporal patterns of disease prevalence clusters of dengue (DENV), chikungunya (CHIKV) and Zika (ZIKV) virus and how socio-economic and climatic variables simultaneously influence the risk and rate of occurrence of infection in Mexico. METHODS: To determine the spatiotemporal clustering and the effect of climatic and socio-economic covariates on the rate of occurrence of disease and risk in Mexico, we applied correlation methods, seasonal and trend decomposition using locally estimated scatterplot smoothing, hotspot analysis and conditional autoregressive Bayesian models. RESULTS: We found cases of the disease are decreasing and a significant association between DENV, CHIKV and ZIKV cases and climatic and socio-economic variables. An increment of cases was identified in the northeastern, central west and southeastern regions of Mexico. Climatic and socio-economic covariates were significantly associated with the rate of occurrence and risk of the three arboviral disease cases. CONCLUSION: The association of climatic and socio-economic factors is predominant in the northeastern, central west and southeastern regions of Mexico. DENV, CHIKV and ZIKV cases showed an increased risk in several states in these regions and need urgent attention to allocate public health resources to the most vulnerable regions in Mexico.


Asunto(s)
Fiebre Chikungunya , Virus Chikungunya , Virus del Dengue , Dengue , Infección por el Virus Zika , Virus Zika , Humanos , Infección por el Virus Zika/epidemiología , Dengue/epidemiología , México/epidemiología , Teorema de Bayes , Fiebre Chikungunya/epidemiología
14.
Surg Endosc ; 37(11): 8473-8482, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37752263

RESUMEN

BACKGROUND: Post-laparoscopic shoulder pain is very common after laparoscopy. One method to reduce postoperative shoulder pain is the pulmonary recruitment maneuver. It is used to reduce post-laparoscopic shoulder pain. This study utilizes a truly experimental, double-blinded, prospective randomized design to assess the effect of pulmonary recruitment maneuvers on post-laparoscopic shoulder pain after laparoscopic cholecystectomy. METHODS: Sixty patients were allocated randomly into two groups. The intervention group received five manual pulmonary inflations for 5 s at a maximum pressure of 25 cm H2O. The control group included patients whose residual CO2 gas was evacuated from the abdominal cavity using passive exsufflation as the routine method at the end of surgery by abdominal massage. Gentle abdominal pressure was applied to facilitate CO2 gas removal. RESULTS: When Ramsay's Sedation Score's results were compared between the two groups after the operation, there was no statistically significant difference between the two groups during the first and (p value = 0.20) second (p value = 0.61) hours. A repeated measures ANOVA revealed that the pulmonary recruitment maneuver is significant (p-value 0.001) and had a high effect size (0.527) in reducing shoulder pain among laparoscopic cholecystectomy patients after controlling the effect of other covariate patient characteristics. CONCLUSION: Utilizing a pulmonary recruitment maneuver at the end of laparoscopic surgery reduces shoulder pain.


Asunto(s)
Colecistectomía Laparoscópica , Laparoscopía , Humanos , Dióxido de Carbono , Colecistectomía Laparoscópica/efectos adversos , Laparoscopía/métodos , Dolor Postoperatorio/etiología , Dolor Postoperatorio/prevención & control , Estudios Prospectivos , Dolor de Hombro/etiología , Dolor de Hombro/prevención & control
15.
Iran J Public Health ; 52(7): 1346-1354, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-37593505

RESUMEN

Background: Anderson's model provides a theoretical structure to understand use of health service. This scoping review aimed to examine the application of Andersen's behavioral model in different studies. Methods: Related studies that were published between 2012 and 2021 were retrieved by searching PubMed, Science Direct, and CINAHL databases. Fourteen studies satisfied the criteria for inclusion. Results: The reviewed studies specified that the Andersen's Model has been used in numerous parts of the health system and concerning different illnesses. The reviewed studies revealed differences in the factors examined. Most of the studies examined age, education, gender, marital status, and employment status as predisposing factors, and income, medical insurance, and living location as enabling factors. While, the chronic illnesses and perceived general health status were examined as need factors, in addition to an extensive diversity of health conditions and illnesses. Though the associations were established among the key factors tested in the reviewed studies and health care service use, the findings were inconsistent. In the reviewed studies, the setting and the study population characteristics looked to have a strong influence on the direction and strength of these associations. Conclusion: Merely a slight number of common factors were examined and there were enormous differences in the methods by which these factors were classified. Future and primary studies are necessary to deepen our understanding of the use of health care services and the complexity of the Andersen's behavioral model.

16.
SAGE Open Nurs ; 9: 23779608231189966, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37528907

RESUMEN

Introduction: The spread of microorganisms is caused by direct or indirect contact, respiratory droplets, and airborne transmission. Knowledge and compliance with standard precautions are crucial in preventing infection in the hospital. Objectives: To assess the level of knowledge and compliance with standard precautions among registered nurses who work in military hospitals and the factors affecting compliance with standard precautions. Methods: A descriptive cross-sectional study was conducted. Four hundred and eight registered nurses at three Jordanian Royal Medical Services hospitals completed an online self-report questionnaire using a convenience sampling technique. The statistical package for social sciences (SPSS) version 25 was used to analyze the data. Results: The level of knowledge of standard precautions among nurses was excellent, with an overall mean score of 15.59 ± 2.22 out of 20; around half (54%) of them had an excellent level. Nurses' compliance with standard precautions was intermediate, with an overall mean score of 59.65 ± 14.57 out of 80. Forty-seven percent of nurses had a high degree of compliance. Compliance with standard precautions was correlated positively with age, working experience in years, total knowledge score, training in standard precautions, and availability of personal protective equipment, and negatively with exposure to sharp injuries. Conclusion: Nurses play a key role in preventing and managing hospital infections through their responsibility for a large proportion of patient treatment and care. Therefore, efforts should be made to improve nurses' perceptions of the basic elements of standard precautions. Even so, results showed that compliance with standard precautions was intermediate. This highlights the need to take the necessary measures to raise the level of compliance. Even so, results showed that compliance with standard precautions was intermediate. This highlights the need to take the necessary measures to raise the level of compliance.

17.
Arch Gynecol Obstet ; 2023 Jul 16.
Artículo en Inglés | MEDLINE | ID: mdl-37454352

RESUMEN

PURPOSE: The purpose of this study was to assess the association between select determinants and HCV screening guideline adherence among physicians who provide prenatal care. RESEARCH QUESTION: What factors may act as determinants of guideline adherence to HCV screening among physicians who provide prenatal care? METHODS: We surveyed a national sample of physicians who provided prenatal care in 2021. The survey included questions from the Clinician Guideline Determinant (CGD) questionnaire, demographic characteristics, and medical practice characteristics. We estimated odds ratios and 95% confidence intervals (CIs) using semi-Bayesian logistic regression for the association between determinants and guideline adherence. RESULTS: Participants included 224 physicians in the United States who reported providing prenatal care. Most physicians practiced in private practice (65%) and the majority were members of the American College of Obstetricians and Gynecologists (ACOG; 91%). Less than half (43%; 95% CI: 36%-49%) of physicians reported regular use of the HCV screening guideline. Physicians who reported general knowledge about HCV (OR = 9.0, 95% CI 3.1-30) or endorsed agreement with ease of implementation (OR = 8.0, 95% CI 2.7-25) had higher odds of adherence to the HCV screening guideline. CONCLUSION: Our study suggests that less than half of practicing prenatal care physicians adhere to HCV screening guidelines for pregnant patients. Our results may be useful as a preliminary screening of select determinants of guideline use for further investigation.

18.
Sci Rep ; 13(1): 8585, 2023 May 26.
Artículo en Inglés | MEDLINE | ID: mdl-37236972

RESUMEN

The accuracy of reliability models is one of the most problematic issues that must be considered for the life of electronic assemblies, particularly those used for critical applications. The reliability of electronics is limited by the fatigue life of interconnected solder materials, which is influenced by many factors. This paper provides a method to build a robust machine-learning reliability model to predict the life of solder joints in common applications. The impacts of combined fatigue and creep stresses on solder joints are also investigated in this paper. The common alloy used in solder joint fabrication is SAC305 (Sn-Ag-Cu). The test vehicle includes individual solder joints of SAC305 alloy assembled on a printed circuit board. The effects of testing temperature, stress amplitude, and creep dwell time on the life of solder joints were considered. A two-parameter Weibull distribution was utilized to analyze the fatigue life. Inelastic work and plastic strain were extracted from the stress-strain curves. Then, Artificial Neural Networks (ANNs) were used to build a machine learning model to predict characteristic life obtained from the Weibull analysis. The inelastic work and plastic stains were also considered in the ANN model. Fuzzy logic was used to combine the process parameters and fatigue properties and to construct the final life prediction model. Then a relationship equation between the comprehensive output measure obtained from the fuzzy system and the life was determined using a nonlinear optimizer. The results indicated that increasing the stress level, testing temperature, and creep dwell time decreases reliability. The case of long creep dwell time at elevated temperatures is worst in terms of impact on reliability. Finally, a single robust reliability model was computed as a function of the fatigue properties and process parameters. A significant enhancement of the prediction model was achieved compared to the stress-life equations.

20.
Ann Med Surg (Lond) ; 85(4): 934-938, 2023 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37113827

RESUMEN

The caudal and basal parts of the lungs are fused together in a rare congenital bronchopulmonary anomaly known as horseshoe lung. The majority of horseshoe lung cases are associated with scimitar syndrome. Most patients present with nonspecific symptoms. Multidetector pneumoangiography can be used to diagnose horseshoe lung, which shows that the isthmus of the pulmonary parenchyma traverses the midline, connecting the two lungs together. Treatment and prognosis are usually determined depending on the presence of other concomitant anomalies and the degree of symptom severity. Case Presentation: A 3-month-old-male patient presented with respiratory symptoms and a history of chest infection. Chest imaging revealed anomalous venous drainage from the right lower lobe of the lung, right lung hypoplasia with mediastinal shift, and a parenchymal isthmus extending between the two lungs. The patient was diagnosed with horseshoe lungs associated with scimitar syndrome. He was also found to have extralobar sequestration to the right lower lobe of the lung. The patient underwent surgical management in the form of tunneling of the anomalous vein into the left atrium using pericardium autograft ligation of the sequestration artery. Clinical Discussion: Because of its common association with other congenital malformations such as scimitar syndrome and cardiovascular defects, clinicians should be meticulous in the investigation and workup process of patients with horseshoe lung in order not to miss any of these associated abnormalities. Conclusion: Although it is very rare, horseshoe lung should be considered in the differential diagnosis of respiratory distress symptoms, especially in children younger than 1 year.

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