bluuebunny/crossref_metadata_2025 huggingface dataset:
Predicting Recurrent Instability of the Shoulder (PRIS): A Valid Tool to Predict Which Patients Will Not Have Repeat Shoulder Instability After First-Time Traumatic Anterior Dislocation
Authors: Olds Margie , Ellis Richard , Kersten Paula
Published: August 2020

Objective

To assess the sensitivity, specificity, and validity of the Predicting Recurrent Instability of the Shoulder (PRIS) tool in people with a first-time traumatic anterior shoulder dislocation.

Design

Prospective cohort study.

Methods

People with first-time traumatic anterior shoulder dislocation (n = 85), aged 16 to 40 years, were recruited within 12 weeks of their shoulder dislocation and followed prospectively for 1 year post injury. We calculated the sensitivity, specificity, negative predictive value, and positive predictive value of the PRIS tool.

Results

Of the 75 participants available for 1-year follow-up, 57 (76%) did not have recurrent shoulder instability. With the PRIS tool cut point set at 0.895, the tool's sensitivity was 39% (95% confidence interval [CI]: 17.3%, 64.3%) and its specificity was 95% (95% CI: 85.4%, 98.9%). The area under the curve was 0.69 (95% CI: 0.55, 0.84; P = .01). The PRIS tool correctly identified 54 of the 57 (95%) who did not have recurrent instability (accuracy, 81%; 95% CI: 70.7%, 89.4%). Negative and positive predictive values were 83% (95% CI: 77.2%, 87.7%) and 70% (95% CI: 40.2%, 89.0%), respectively.

Conclusion

The PRIS tool can predict those who will not have further shoulder instability in the year following first-time traumatic anterior shoulder dislocation. The PRIS tool cannot accurately predict those who will have recurrent shoulder instability. J Orthop Sports Phys Ther 2020;50(8):431–437. doi:10.2519/jospt.2020.9284
Meniscus or Cartilage Injury at the Time of Anterior Cruciate Ligament Tear Is Associated With Worse Prognosis for Patient-Reported Outcome 2 to 10 Years After Anterior Cruciate Ligament Injury: A Systematic Review
Authors: Pedersen Marie , Johnson Jessica L. , Grindem Hege , Magnusson Karin , Snyder-Mackler Lynn , Risberg May Arna
Published: August 2020

Objectives

(1) To assess prognostic factors for patient-reported outcome measures (PROMs) and physical activity 2 to 10 years after anterior cruciate ligament reconstruction (ACLR) or anterior cruciate ligament (ACL) injury, and (2) to assess differences in prognostic factors between patients treated with ACLR and with rehabilitation alone.

Design

Prognosis systematic review.

Literature Search

Systematic searches were performed in PubMed, Web of Science, and SPORTDiscus.

Study Selection Criteria

We selected prospective cohort studies and randomized clinical trials that included adults or adolescents undergoing either ACLR or rehabilitation alone after ACL rupture. Studies had to assess the statistical association between potential prognostic factors (factors related to patient characteristics, injury, or knee symptoms/function measured at baseline or within 1 year) and outcomes (PROMs and physical activity).

Data Synthesis

Our search yielded 997 references. Twenty studies met the inclusion criteria. Seven studies with low or moderate risk of bias remained for data synthesis.

Results

Moderate-certainty evidence indicated that concomitant meniscus and cartilage injuries were prognostic factors for worse PROMs 2 to 10 years after ACLR. Very low–certainty evidence suggested that body mass index, smoking, and baseline PROMs were prognostic factors for worse outcome. Very low–certainty evidence suggested that female sex and a worse baseline Marx Activity Rating Scale score were prognostic factors for a worse Marx Activity Rating Scale score 2 to 10 years after ACLR. There was a lack of studies on prognostic factors after rehabilitation alone.

Conclusion

Concomitant meniscus and cartilage injuries were prognostic factors for worse long-term PROMs after ACLR. The certainty was very low for other prognostic factors. J Orthop Sports Phys Ther 2020;50(9):490–502. Epub 1 Aug 2020. doi:10.2519/jospt.2020.9451
Moving Beyond Weekly “Distance”: Optimizing Quantification of Training Load in Runners
Authors: Paquette Max R. , Napier Christopher , Willy Richard W. , Stellingwerff Trent
Published: August 2020

Background

Quantifying total running distance is valuable, as it comprises some aspects of the mechanical/neuromuscular, cardiovascular, and perceptual/psychological loads that contribute to training stress and is partially predictive of distance-running success. However, running distance is only one aspect contributing to training stress.

Clinical Question

The purpose of this commentary is to highlight (1) problems with only using running distance to quantify running training and training stress, (2) the importance of alternative approaches to quantify and monitor training stress, (3) moderating factors (effect-measure modifiers) of training loads, and (4) the challenges of monitoring training stress to assess injury risks.

Key Results

Training stress is influenced by external (ie, application of mechanical load) and internal (ie, physiological/psychological effort) training load factors. In running, some commonly used external load factors include volume and pace, while physiological internal load factors include session rating of perceived exertion, heart rate, or blood lactate level. Running distance alone might vastly obscure the cumulative training stress on different training days and, ultimately, misrepresent overall training stress. With emerging and novel wearable technology that quantifies external load metrics beyond volume or pace, the future of training monitoring should have an ever-increasing emphasis on biomechanical external load metrics, coupled with internal (ie, physiological/psychological) load metrics.

Clinical Application

It may be difficult to change the running culture's obsession with weekly distance, but advanced and emerging methods to quantify running training discussed in this commentary will, with research confirmation, improve training monitoring and injury risk stratification. J Orthop Sports Phys Ther 2020;50(10):564–569. Epub 1 Aug 2020. doi:10.2519/jospt.2020.9533
Training Load and Injury Part 1: The Devil Is in the Detail—Challenges to Applying the Current Research in the Training Load and Injury Field
Authors: Impellizzeri Franco M. , Ward Patrick , Coutts Aaron J. , Bornn Luke , McCall Alan
Published: August 2020

Background

This article sets the scene for a critique of the research underpinning 2 common clinical assumptions: (1) training workload is a key factor influencing sports injury risk, and (2) training workload can be manipulated to reduce injury risk. In this clinical commentary, we address why it is important for clinicians to critically evaluate the evidence behind research conclusions.

Clinical Question

Has research been designed and conducted well enough to help clinicians answer the questions, “What is the relationship between training workload and sports injury risk?” and “Can the metrics based on training workload be used to decrease injury risk?”

Key Results

In the past decade, many sports injury researchers have developed new measures of exposure, based on internal and external training workload, to study the relationship between training load and injury. Some of these metrics may have been embraced by researchers and clinicians because (1) they are apparently supported by the scientific literature, (2) they are simple to calculate and use (averages and their ratio), and (3) there is an apparent reasonable rationale/narrative to support using workload metrics. However, intentional or unintentional questionable research practices and overinterpretation of research results undermine the trustworthiness of research in the training load and sports injury field.

Clinical Application

Clinicians should always aim to critically examine the credibility of the evidence behind a research conclusion before implementing research findings in practice. Something that initially looks promising and inviting might not be as revolutionary or useful as one first anticipated. J Orthop Sports Phys Ther 2020;50(10):574–576. Epub 1 Aug 2020. doi:10.2519/jospt.2020.9675
Sticking to It: A Scoping Review of Adherence to Exercise Therapy Interventions in Children and Adolescents With Musculoskeletal Conditions
Authors: Holt Christopher J. , McKay Carly D. , Truong Linda K. , Le Christina Y. , Gross Douglas P. , Whittaker Jackie L.
Published: August 2020

Objective

To identify and categorize barriers, facilitators, and strategies to boost exercise therapy adherence in youth with musculoskeletal conditions to inform research and clinical practice.

Study Design

Scoping review.

Literature Search

We searched MEDLINE, CINAHL, SPORTDiscus, Scopus, PEDro, and ProQuest from inception to October 1, 2019.

Study Selection Criteria

Studies written in English, with original data featuring an adherence barrier, facilitator, or boosting strategy for exercise therapy in youth (age, 19 years or younger) with musculoskeletal conditions, were included.

Data Synthesis

Arksey and O'Malley's framework and the PRISMA Extension for Scoping Reviews guided data synthesis. Study quality was assessed with the Mixed Methods Appraisal Tool. Descriptive consolidation included study and sample characteristics, exercise therapy details, and adherence measurement specifics. Inductive thematic analysis of adherence barriers, facilitators, and boosting strategies followed Braun and Clarke's 6-step guide.

Results

Of 5705 potentially relevant records, 41 studies, representing 2020 participants (64% girls; age range, 2–19 years) with 12 different musculoskeletal conditions and multiple exercise therapy interventions, were included. Despite poor reporting of adherence concepts, time constraints, physical environment (eg, location), and negative exercise experiences were commonly identified barriers. Social support and positive exercise experiences were frequently identified facilitators. Reinforcement, exercise program modification, and education were recurring boosting strategies, despite being infrequent barriers or facilitators.

Conclusion

A diversity of barriers to and facilitators of exercise therapy for youth with musculoskeletal conditions were identified. Efforts to link adherence-boosting strategies to an individual's needs should be considered. Making exercise enjoyable, social, and convenient may be important to maximizing adherence in this population. J Orthop Sports Phys Ther 2020;50(9):503–515. Epub 1 Aug 2020. doi:10.2519/jospt.2020.9715
Embolia de dióxido de carbono
Authors: Köhnenkampf Ruth
Published: August 2020

Carbon dioxide (CO) embolism is a complication of laparoscopic surgery that, although often does not have adverse sequelae, can be fatal. This is due to the fact that when CO is injected into the blood vessels, the bubbles impede blood flow, which clinically expresses as: decreased stroke volume, hypoxemia, sudden fall or sudden increase in expired CO, bradycardia, hypotension, dyspnea, cyanosis, arrhythmias, bilateral mydriasis, murmur in a mill wheel at auscultation and cardiovascular collapse with cardiorespiratory arrest. In this article we will present physiology of venous embolism, diagnosis, syntoms, treatment and prevention.
COVID-19: Revisión de evidencia de una pandemia en evolución
Authors: Acuña María Paz
Published: August 2020

COVID-19 is a new disease, caused by a virus first identified just over 3 months ago, and therefore the evidence is developing and rapidly changing, with dizzying production of scientific literature every day. This review seeks to synthesize the information available to date about certain relevant aspects of the disease, understanding that everything written is subject to change as our knowledge of it advances.
Utilidad de la ecocardiografía transtorácica focalizada en emergencias hemodinámicas intraoperatorias
Authors: Cabrera Schulmeyer María Carolina , Straub Andrea
Published: August 2020

Echocardiography represents one of the most important advances in the monitoring of critical patients. Initially available only in cardiovascular surgery, currently, there is transesophageal echocardiography (TEE) and transthoracic echocardiography (ETT) in non-cardiac surgery, for anesthesiologists. The advantages of ETT is a non-invasive tool, of lower cost than the transesophageal transducer and therefore more feasible to be overcrowded and available in the pavilion. To evaluate the usefulness of TTE in patients with hemodynamic compromise during non-cardiac surgery. In a prospective manner between April 2016 and September 2018, patients were studied who during their intraoperative period presented a compromise of their hemodynamic state, defined as an average blood pressure under 55 mm Hg, for more than 3 minutes and without response to the usual therapy based on vasopressors and volume. Each of these patients had a prospective protocol for focused ETT looking for the cause of this disorder, by a duly trained operator. 124 patients, with an average age of 67 years (range 42 to 93 years) were evaluated. In all cases, at least one echocardiographic window was obtained that allowed a diagnosis to be made and/or to guide the therapy. The main causes of hemodynamic compromise were hypovolemia (52%), poor left ventricular function (21%) and other causes such as pericardial effusion, suspected pulmonary thromboembolism, pulmonary pathology and suspected myocardial ischemia. The ETT could be a feasible tool to use in acute hemodynamic events, since it offers good quality windows that allow new decisions based on the diagnosis and also allows to guide the selected therapies. In addition, it has been shown to positively impact clinical behaviors in the perioperative period. ETT is a non-invasive monitor, reasonably easy to learn to use; In addition to directly visualizing cardiac structures, it allows differential diagnoses of the causes of intraoperative hypotension. The therapies can also be decided according to the echocardiographic images and control how they generate changes in the cardiac cavities and in the hemodynamic state of the patient.
Low dose intrathecal morphine for hip arthroplasty
Authors: Rojas G. Andrés , Hernández P. Marcela , Vidal D. Paola , Balkenhol N. Marco , Opazo V. Marcela , Riquelme A. Miguel
Published: August 2020

100 mcg intrathecal morphine (ITM) for hip arthroplasty provides adequate functional recovery and reduces associated complications but is not exempt from opioid-related adverse effects. We evaluate efficacy of a reduced dose of ITM (80 mcg) in terms of anesthetic quality, postoperative analgesia, complication rates and early recovery. Case control study. Patients under hip arthroplasty were treated on a specific protocol, using neuraxial anesthesia with hyperbaric bupivacaine 10.5-13.5 mg plus 80 mcg ITM controls with 100 mcg ITM. Demographic variables, intra and perioperative course were extracted from medical records. Pain severity and morphine associated complications were blindly assessed at regular intervals postoperatively. p < 0.01 were considered significant. 82 patients were analyzed. Mean age was 64.21 years, 62.20% women and 70.73% ASA-2. Main endoprosthesis indication was arthrosis (58.53%). No statistically significant differences in demographic and operative data were found between groups, including surgical time, ambulation time, length of stay, and patient satisfaction for pain management. Mean VAS for pain during first 24 hours was 0.24 for the low ITM group and 0.22 for control. Rescue intravenous morphine was the same between groups. Compared to 80 mcg ITM, 100 mcg showed trends for higher complication rates for respiratory depression (OR 2.58, CI 95% 0.45-14.54, p = 0.28), nausea without vomiting (OR 1.82, CI 95% 0.82-4.01, p = 0.13), urinary retention (OR 2.02, CI95% 0.88-4.61, p = 0.09) and significantly higher rates of pruritus (OR 3.55, CI 95% 1.61-7.82, p < 0.01). 80 mcg ITM during spinal anesthesia for hip arthroplasty provided comparable postoperative analgesia and lower incidence of opioid-related adverse effects.
Bloqueo del ganglio esfenopalatino, una opción para el tratamiento de la cefalea postpunción dural
Authors: da Rosa Sousa Samuel , Opolski Isadora Juliana , Grande Carstens Marcio , Farías Paula , Voltolini Guilherme , Gomes Renato Lorena , Branco Ferreira Sarita
Published: August 2020

Post-dural puncture headache is a complication of neuroaxial anesthesia. The initial approach consists of supportive treatment. In case of therapeutic failure, the epidural blood patch (PSE) is the treatment of choice. The case of a sphenopalatine ganglion block is presented for its management with good results.
Endocarditis de Libman-Sacks de válvulas nativas derechas en contexto de síndrome antifosfolípido y lupus eritematoso sistémico: ¡cuando el tratamiento marca la diferencia!
Authors: Arrioja Salazar Alma S. , Velazco C. Luis Emiro
Published: August 2020

We report the case of a 54 years old woman with antiphospholipid syndrome in irregular therapy, admitted due to exertional dyspnea and orthopnea. The transthoracic echocardiogram showed dilated cardiomyopathy with biventricular systolic dysfunction, pulmonary hypertension and masses related to the pulmonary and tricuspid valve without autonomic movement. The crops and white count were normal, with alteration of the SAF test, in addition, SLE was diagnosed. It was started therapy for heart failure, steroids, rituximab and anticoagulation, with improving of the symptoms. The echocardiographic control showed remission of the tricuspid masses and similar dimensions of the pulmonary mass.
Paro cardiorrespiratorio intraoperatorio en un paciente con síndrome de Brugada
Authors: López L. Ignacia , Pacheco C. Claudio , Cruzat R. Francisco
Published: August 2020

A 61-year-old female patient with history of hipertension is scheduled to undergo a minor ginecological procedure (endoscopic endometrial polipus resection) with general anesthesia. She received standard monitorization, induction with midazolam, propofol and fentanyl. Ventilated with laringeal mask. Anesthesia was maintained with sevoflurane, nitrous oxide and oxygen. During surgical procedure, the patient received atropine and ephedrine associated with two episodes of bradycardia without hemodinamic disturbances. The surgery ended without problems. During the weaking up process she presented characteristical waves of ventricular fibrillation, recuperating sinusal rhythm secondary to defibrillation with 360 J. There was no clear cause for cardiac arrest at that moment so patient was translated to the ICU for observation, monitoring and study. Postoperative EKG presented an ascending ST segment in V to V derivations without hemodynamic alterations associated. The possible diagnosis of Brugada’s Syndrome was proposed. The patient received an implantable defibrillator. The mechanisms and anesthetic implications are discussed and reviewed.
Manejo anestésico de resección de quiste de vallécula en neonato. A propósito de un caso
Authors: Fuertes S. Neus , Cortell B. José , Jaramillo G. Juan Camilo , Argente N. Pilar
Published: August 2020

Difficult airway management is one of the most important challenges an anesthesiologist faces. It is due to the high morbidity and mortality that it entails. The challenge is even greater if the patient is a newborn. For this reason, we should have different strategies that allow us to anticipate and treat possible complications derived from the procedure. In this case, we present a newborn with vallecular cyst and respiratory distress who is admitted for cyst resection. The gold-standard in anticipated difficult airway management is the fibrobronchoscope. We decided to perform an alternative management by means of orotracheal intubation with videolaryngoscope (Glydescope) in spontaneous ventilation.
Miocardiopatía de y movimiento sistólico anterior de válvula mitral
Authors: Schlack Emilia , Aranda Fernando
Published: August 2020

Cardiomyopathy associated with left ventricular outflow tract obstruction (LVOT) is a rare cause of persistent perioperative hypotension. One of the causes of this association is the systolic anterior motion (SAM) of the mitral valve. We report a case of a 67-year-old woman who, after undergoing liver segmentectomy because of metastasis, presents post-operative hypotension that is difficult to manage. Upon evaluation with a transthoracic echocardiogram, the diagnostic suspicion of syndrome associated with LVOT obstruction secondary to SAM was raised. As initial therapy, a volume expander, in association with propanolol and phenylephrine were administred, achieving partial hemodynamic response. Later, she evolved with signs of heart failure and was transferred to the intensive care unit for management. In this unit, non-invasive ventilatory support, diuretic and vasopressor therapy were required, achieving favorable results on the second post-operative day. Echocardiography was essential to make the differential diagnosis against a persistent post-operative hypotension.
Clinical Presentation, Cardiac Magnetic Resonance Findings, and Prognosis of Patients with Arrhythmogenic Right Ventricular Cardiomyopathy – An Experience from Pakistan
Authors: Ahmed Intisar , Tipoo Fateh Ali
Published: August 2020

Objectives:

Arrhythmogenic right ventricular cardiomyopathy (ARVC) is an inherited heart-muscle disease, characterized by fibro-fatty replacement and ventricular arrhythmias, that primarily affects the right ventricle (RV). We aimed to look at the clinical presentation, cardiac magnetic resonance (CMR) imaging findings and prognosis of patients with ARVC in Pakistan.

Material and Methods:

It is a retrospective observational study, 17 consecutive patients with CMR and other findings consistent with ARVC, were enrolled from 2010 to 2019 at a single center.

Results:

Out of 17 patients, 12 (70.6%) were male with a mean age of 33.5 ± 17.5 years. Family history of sudden cardiac death was present in 3 (17.7%) patients while one (5.9%) patient had family history of ARVC. Syncope was the first presenting symptom in eight (47.1%) patients. On 12 leads ECG, T wave inversion in precordial leads was found in 6 (35.4%) patients, and epsilon wave was present in only 3 (17.7%) patients. On echocardiogram, 13 (76.5%) patients had dilated RV with reduced systolic function. On CMR, majority of patients (n = 14, 82.4%) were found to have RV dilatation with regional dyskinesia and fatty infiltration, 9 (52.9%) of them had left ventricular involvement also. Follow-up was available for 14 patients (82.4%) with a mean follow-up period of 35.5 ± 19.7 months. Three (21.4%) of them died and 10 (71.4%) got admissions for heart failure during follow-up period.

Conclusion:

Arrhythmia related events are the main presenting symptoms of ARVC in this region, and left ventricular involvement in ARVC is not rare in this population. The mortality is relatively high, probably due to advanced disease at the time of presentation and less medical facilities available.
Slit-like hypertensive hydrocephalus: Report of a late, complex, and multifactorial complication in an oncologic patient
Authors: Umana Giuseppe Emmanuele , Raudino Giuseppe , Alberio Nicola , Inserra Francesco , Giovinazzo Giuseppe , Fricia Marco , Chiriatti Stefano , Nicoletti Giovanni Federico , Cicero Salvatore , Scalia Gianluca
Published: August 2020

Background:

Several sophisticated techniques and many chemotherapy drugs have improved life expectancy of oncologic patients allowing us to observe late complications which present many years after the initial treatment.

Case Description:

We present a unique case of a patient affected by acute lymphoblastic leukemia at the age of 6 years, treated with whole brain radiotherapy and intrathecal chemotherapy, developing meningiomatosis and leptomeningeal alterations as late complications and the interaction of these two entities caused a peculiar form of hydrocephalus without ventricular dilation. The diagnosis of pseudotumor cerebri was excluded due the postradio/chemotherapy development of meningiomatosis, not present in a previously head magnetic resonance imaging, that exerted compression to the Sylvian aqueduct causing intracranial hypertension with papillary stasis without ventricles enlargement due to brain stiffness. Moreover, a peculiar intraoperative rubbery consistency of brain parenchyma was detected strengthening this complex diagnosis.

Conclusion:

At the best of our knowledge, this is the first report of obstructive hydrocephalus without ventricles dilation caused by brain stiffness related to late alterations of oncologic treatments. This report could be a guide for further complex patients diagnoses and for improving treatments efficacy.
Unilateral absence of the internal carotid artery associated with anterior communicating artery aneurysms: Systematic review and a proposed management algorithm
Authors: Al-Khafaji Aktham O. , Al-Sharshahi Zahraa F. , Lee Ryan P. , Alsubaihawi1 Zahraa A. , Dolachee Ali A. , Hoz Samer S.
Published: August 2020

Background:

Absence or hypoplasia of the internal carotid artery (ICA) is a rare congenital anomaly that is mostly unilateral and highly associated with other intracranial vascular anomalies, of which saccular aneurysm is the most common. Blood flow to the circulation of the affected side is maintained by collateral pathways, some of which include the anterior communicating artery (Acom) as part of their anatomy. Therefore, temporary clipping during microsurgery on Acom aneurysms in patients with unilateral ICA anomalies could jeopardize these collaterals and place the patient at risk of ischemic damage. In this paper, we review the literature on cases with a unilaterally absent ICA associated with Acom aneurysms and provide an illustrative case.

Methods:

We combined our experience of one case of a unilaterally absent ICA associated with an Acom aneurysm with the 33 existing publications on the same subject in the literature, for a total of 40 cases. We provide a detailed systematic literature review of this association of vascular anomalies, exploring different aspects regarding the collateral pathways and how they impact management strategies and propose a management algorithm to deal with such association.

Results:

The mean age was 48.2 ± 16.5 years. The aneurysmal rupture was the most common presentation (75%). Agenesis was observed in 70% of patients, followed by hypoplasia (20%) and, finally, aplasia (10%). Lie Type A was the most common pattern of collaterals (50%), with Types B and D being of almost equal proportions. Most aneurysms were located at the A1-Acom junction contralateral to the anomalous side (Fisher’s Exact test;P= 0.03). One case of temporary clipping was reported in the literature.

Conclusion:

Acom aneurysms in patients with unilateral ICA anomalies, given they are more commonly present contralaterally, could be of acquired etiology, warranting periodic screening in asymptomatic patients. Temporary clipping might be safe in patients with Type D collateral pattern, while those with Types A or B may require intraoperative rupture risk assessment and a tailored management plan to avoid disrupting collateral flow and causing ischemia.
Three tesla magnetic resonance angiography with ultrashort echo time describes the arteries near the cerebral aneurysm with clip and the peripheral cerebral arteries
Authors: Katsuki Masahito , Narita Norio , Ozaki Dan , Sato Yoshimichi , Iwata Saki , Tominaga Teiji
Published: August 2020

Background:

The assessment of the clipped cerebral aneurysm and the cerebral arteries after the treatment of subarachnoid hemorrhage (SAH) is important to find aneurysm regrowth or postoperative cerebral vasospasm. Usually, contrast-enhanced computed tomography angiography is performed for the evaluation of the arteries, but it has side effects of contrast medium. Time-of-flight magnetic resonance angiography (MRA) is a fast and non-invasive method, but clip-induced artifact limits assessment of the artery in the vicinity of the clip. 1.5T MRA with ultrashort echo time (UTE) reduces metal artifact, but the obtained image is too rough to evaluate the aneurysm remnant, and the description range is too narrow to assess the cerebral vasospasm. We routinely use SIGNA Pioneer 3.0T (GE Healthcare Life Sciences, Buckinghamshire, England) and perform SILENT SCAN with UTE-MRA for the postoperative assessment of the clipped aneurysm and cerebral arteries for SAH patients treated by clipping. It has better image quality and describes arteries with a wide description range, so it possesses the potential to overcome the disadvantages of 1.5T UTE-MRA.

Case Description:

We presented a representative SAH patient who postoperatively underwent 3.0T UTE- MRA after clipping. The artery near the clipped aneurysm was evaluated in detail, and the cerebral arteries were described from the main trunk to the peripheral parts with a wide description range, which enabled the assessment of cerebral vasospasm.

Conclusion:

3.0T UTE-MRA may be helpful for the usual assessment of the arteries after clipping and cerebral vasospasm in the future.
Machine Learning Enables Highly Accurate Predictions of Photophysical Properties of Organic Fluorescent Materials: Emission Wavelengths and Quantum Yields
Authors: Ju Cheng-Wei , Bai Hanzhi , Li Bo , Liu Rizhang
Published: August 2020

The predictions of photophysical parameters are of crucial practical importance for the development of functional organic fluorescent materials, whereas the expense of quantum mechanical calculations and the relatively low universality of QSAR models have challenged the task. New avenues opened up by machine learning (ML), we establish a database of solvated organic fluorescent dyes and develop highly efficient ML models for the predictions of maximum emission/absorption wavelength and photoluminescence quantum yields, providing a reliable and efficient approach to high-throughput screenings. Various combinations of ML algorithms and molecular fingerprints were investigated. For emission wavelengths, TD-DFT accuracy was achieved under real-world conditions. Reliable identification of strong fluorescent materials was also demonstrated. We show that the easily obtainable consensus fingerprint inputs combined with proper ML algorithms enables efficient re-training based on additional datapoints whereby systematic improvements of our ML models can be achieved.
Lettuce life stage classification from texture attributes using machine learning estimators and feature selection processes
Authors: Lauguico Sandy Cruz , Concepcion Ronnie II Sabino , Alejandrino Jonnel Dorado , Tobias Rogelio Ruzcko , Dadios Elmer Pamisa
Published: August 2020

Classification of lettuce life or growth stages is an effective tool for measuring the performance of an aquaponics system. It determines the balance in water nutrients, adequate temperature and lighting, other environmental factors, and the system’s productivity to sustain cultivars. This paper proposes a classification of lettuce life stages planted in an aquaponics system. The classification was done using the texture features of the leaves derived from machine vision algorithms. The attributes underwent three different feature selection processes, namely: Univariate Selection (US), Recursive Feature Elimination (RFE), and Feature Importance (FI) to determine the four most significant features from the original eight attributes. The features selected were used for training four estimators from Decision Trees Classifier (DTC), Gaussian Naïve Bayes (GNB), Stochastic Gradient Descent (SGD), and Linear Discriminant Analysis (LDA). The models trained using DTC and SGD were then optimized as they have hyperparameters for tuning. A comparative analysis among Machine Learning (ML) algorithms was conducted to identify the best-performing model with the given application. The best features were derived from US and FI as they have the same top four features using the DTC estimator optimized with the hyperparameters tuned to max depth having 5, criterion equated to ‘Gini', and splitter was set to 'Best'. The accuracy obtained from cross-validation evaluation resulted in 87.92%. Considering consistency with hold-out validation, LDA outperforms optimized DTC even with lower accuracy of 86.67%. This accuracy of LDA outperformed DTC due to its sufficient fit for generalizing the testing data on classifying lettuce growth stage.
Classifying Barako coffee leaf diseases using deep convolutional models
Authors: Montalbo Francis Jesmar Perez , Hernandez Alexander Arsenio
Published: August 2020

This work presents the application of recent Deep Convolutional Models (DCM) to classify Barako leaf diseases. Several selected DCMs performed image classification tasks using Transfer Learning and Fine-Tuning, together with data preprocessing and augmentation. The collected dataset used totals to 4,667. Each labeled into four different classes, which included Coffee Leaf Rust (CLR), Cercospora Leaf Spots (CLS), Sooty Molds (SM), and Healthy Leaves (HL). The DCMs were trained using the partial 4,023 images and validated with the remaining 644. The classification results of the trained models VGG16, Xception, and ResNetV2-152 attained overall accuracies of 97%, 95%, and 91%, respectively. By comparing in terms of True Positive Rate (TPR), we found that Xception has the highest number of correct classifications of CLR, VGG16 with SM, and CLS, while ResNetV2-152 with the lowest TPR for CLR. The evaluated results indicate that the use of Deep Convolutional Models with an adequate amount of data, proper fine-tuning, preprocessing, and transfer learning can yield efficient classifiers for identifying several Barako leaf diseases. This work primarily contributes to the growing field of deep learning, specifically for helping farmers improve their diagnostic process by providing a solution that can automatically classify Barako leaf diseases.
“Assumptos Femininos”: a moda no Correio da Manhã nos anos 1920
Authors: L. F. Lopes Ana Claudia
Published: August 2020

Este artigo analisa a seção “Assumptos Femininos” do jornal Correio da Manhã nos anos 1920 buscando compreender o perfil de suas leitoras e como ela estava inserida no direcionamento à modernização do matutino, dando especial enfoque à moda e aos textos ali publicados. O intuito é contribuir com informações sobre a história da imprensa de moda em jornal. Como o Correio era um matutino de ampla circulação, considera-se sua grande influência perante o público leitor. A pesquisa foi pautada principalmente na leitura do próprio Correio da Manhã, usando como suporte fontes secundárias sobre o contexto histórico do Rio de Janeiro, da imprensa e da moda nos anos 1920.
Das modas às tintas: representações do feminino nas publicidades da revista Anuário das Senhoras (1940-1950)
Authors: Lindsey Rodrigues Mendonça Ramona , Fabiano de Freitas Mendes Francisco
Published: August 2020

Análise sobre representações do feminino a partir dos anúncios publicitários da revista Anuário das Senhoras (1934 a 1958). O recorte temporal deste artigo compreende os anúncios a partir dos anos de 1940. O texto é guiado pelos conceitos de moda e publi-cidade, e dialoga com as discussões com os autores:  Svendsen, Habermas, Lipovetsky and Wicliams. Entendendo-se moda como conceito que abrange múltiplos significados, a análi-se dos anúncios no periódico procurou discutir sua contribuição na construção e manuten-ção dos papéis sociais pensados para a mulher na realidade urbana brasileira da época. Ve-rificou-se o esforço da publicidade em equilibrar tradição e modernidade, num movimento que abria para as mulheres as portas do consumo e do trabalho ao mesmo tempo em que reafirmava seu papel central no ambiente doméstico.
Corpos enxutos, corpos desnudos: a moda na imprensa ilustrada carioca e a disseminação de uma nova estética corporal (1920-1940)
Authors: Mello Júlia
Published: August 2020

[resumo] Este artigo tem por objetivo apresentar a construção de diálogos em torno das novas exigências do corpo da brasileira visíveis a partir da década de 1920, considerando a análise da moda disseminada nas revistas ilustradas cariocas Para todos, Careta e O Malho. O período escolhido – de 1920 a 1940 – é de significativas mudanças sociais, culturais e econômicas no Brasil e também do desenvolvimento dos discursos sobre as práticas cor-porais e esportivas que contribuíram para a ideia de cuidado corporal como algo atrelado à saúde, à beleza e à força produtiva. A análise dos periódicos é realizada a partir de uma discussão teórica que entrelaça história do corpo, questões de gênero, moda, discursos mé-dicos e normativos. Dessa forma, considera autores como Georges Vigarello (2011), Deni-se Sant’anna (2016), Carmen Lúcia Soares (2011) e Michel Foucault (1999). Os resultados revelam a construção de olhares pautados em convenções e estereótipos, limitadores de possibilidades individuais e sociais, a partir da imagem da mulher na fotografia, no texto ou na ilustração. Imagens que reafirmam os valores dominantes, a hierarquia entre os sexos.
Projetos Uniforms de Andrea Zittel: linhas de força e de resistência no dispositivo moda
Authors: Almada Larissa , Mesquita Cristiane
Published: August 2020

Compreendendo a moda como um dos dispositivos que produzem modos de vida no contexto contemporâneo, este artigo apresenta os projetos Uniforms da artista americana Andrea Zittel, tomados como referências para problematizar os padrões do vestir, a efemeridade e o consumismo, considerados linhas de força no dispositivo moda. Inicialmente, é apresentada uma breve trajetória do vestuário na arte. Na sequência, é fei-to um panorama sobre Zittel e os projetos Uniforms, pontuando o trajeto da artista nessas proposições. Com base nos filósofos Gilles Lipovetsky e Lars Svendsen, apresenta-se uma visão teórica sobre linhas de força no dispositivo moda para observar discursos de moda veiculados em mídias impressas e digitais, que apontam sua ação na contemporaneidade. As criações de Zittel são consideradas linhas de resistência ao efeito hegemônico produzi-do pelo dispositivo de moda, contrariando regras e desafiando-o, propondo outros modos de vida que mostram diferentes perspectivas para lidar com o vestir.
Experimental and Numerical Evaluation of Concentrically Loaded RC Columns Strengthening by Textile Reinforced Concrete Jacketing
Authors: Ngo Dang Quang , Nguyen Huy Cuong , Mai Dinh Loc , Vu Van Hiep
Published: August 2020

Nowadays, Textile Reinforced Concrete (TRC) has become a very popular strengthening technique for concrete structures. This paper presents an investigation on the applicability of TRC for strengthening reinforced concrete column. Both experimental and numerical studies are conducted to evaluate the confinement effects of various TRC strengthening schemes. The experimental study is performed on a series of six reinforced concrete square columns tested to failure. Two of them were un-strengthened as references, the other four were strengthened by one or two layers of Carbon Textile Reinforced Concrete (CTRC). The results indicated that the application of carbon TRC enhanced the ductility and ultimate strength of the specimens. Failure of all strengthened columns was together with tensile rupture of textile reinforcements at the corners of column. Finite element models of the CTRC strengthened columns based on ATENA software package were developed and verified with the experimental results. The analytical results show that in the specimen corner areas, textile reinforcements are subjected to a 3D complicated stress state and this may be the cause of their premature failure.
Enhancement Punching Shear in Flat Slab Using Mortar Infiltrated Fiber Concrete
Authors: Shwalia Ali Sabah Imran , Al-Salim Nabeel Hasan Ali , Al-Baghdadi Haider M.
Published: August 2020

In this paper, improving the punching shear of slab column connection using mortar infiltrated fiber concrete is studied. Eight specimens of reinforced concrete slabs identical in dimension and reinforcement were tested, six of them were casting with hybrid concrete (normal strength concrete and mortar infiltrated fiber concrete) and two specimens were cast with normal strength concrete as control specimens. All specimens were tested under vertical loading. The mortar infiltrated fiber concrete was cast monolithically with the normal strength concrete at different thickness at one and a half times of the effective depth (1.5d) at the center of the slab, once at all the thickness of cross section of the slab and the others at half thickness either tension or compression face of the slabs all cases cast with two types of fiber. The vertical load was applied upward through a square column with a dimension of (100 mm). In all slabs, no failure in mortar infiltrated fiber concrete was observed. The test results showed that the use of mortar infiltrated fiber concrete improves the punching shear strength for some cases according to the type of fibers and the location of casting mortar infiltrated fiber concrete in slabs. The enhancement in punching shear strength due to using mortar infiltrated fiber concrete at 1.5d square shape (265 mm) ranged from 4% to 46% compared with the control specimens.
Parametric Vine Copula Construction for Flood Analysis for Kelantan River Basin in Malaysia
Authors: Latif Shahid , Mustafa Firuza
Published: August 2020

The multivariate approach of flood characteristics such as flood peak flow (P), volume (V), and duration (D) is much beneficial in recognizing the critical behaviour of flood episodes at a river basin scale. The incorporation of 2-dimensional copulas for establishing bivariate flood dependency frequently appears, but it could be more comprehensive if we focus all the three flood characteristic simultaneously. In such circumstances, incorporation of vine or Pair-Copula Construction (PCC) could produce a better approximation of joint probability density and much practical approach in the uncertainty analysis, in comparison with conventional trivariate copula distribution. This study demonstrated the efficacy of parametric vine copula in the modelling of trivariate flood characteristics for the Kelantan River basin in Malaysia. The D-vine tree structure is selected where the Gaussian and Frank copula is recognized for bivariate flood pairs (P-V) and (P-D) pairs in the first stage, using the maximum-pseudo-likelihood (MPL) estimation procedure. Similarly, the Gumbel copula is selected in the modelling of conditioned data obtained through the conditional distribution function of bivariate copulas selected in the previous stage based on the partial differentiation, also called h-function. Finally, the full density function of the 3-dimension structure is derived and compared with the observed flood characteristics. Furthermore, tail dependence properties and behaviour of D-vine copula are also investigated, which reveals for well capturing the general behaviour of Gaussian and Frank copula fitted to flood pair (P-V) and (V-D) and reproduces the overall flood correlation structure fairely well. Both the primary ‘OR’ and ‘AND’ joint return periods for trivariate flood events are estimated which pointing that ‘AND’ joint case produces higher return value than ‘OR’ case.
Estimating the First-year Corrosion Losses of Structural Metals for Continental Regions of the World
Authors: Panchenko Yu. M. , Marshakov A. I. , Nikolaeva L. A. , Igonin T. N.
Published: August 2020

The knowledge of the first-year corrosion losses of metals (K1) in various regions of the world is of great importance in engineering applications. The K1 values are used to determine the categories of atmospheric corrosivity, and K1 is also the main parameter in models for the prediction of long-term corrosion losses of metals. In the absence of experimental values of K1, their values can be predicted on the basis of meteorological and aerochemical parameters of the atmosphere using the dose-response functions (DRF). Currently, the DRFs presented in ISO 9223:2012(E) /1/ standard are used for predicting K1 in any region of the world, along with the unified DRFs /2/ and the new DRFs /3/. The predicted values of corrosion losses (K1pr) of carbon steel, zinc, copper and aluminum obtained by various DRFs for various continental regions of the world are presented. In this work we used the atmosphere corrosivity parameters and experimental data on the corrosion losses of metals for the first year of exposure (K1exp) for the locations of the tests performed under the international UN/ECE program, the MICAT project, and the Russian program. For the first time, a comparative assessment of the reliability of various DRFs is given by comparing the values of K1pr and K1ex using graphical and statistical methods. The statistical indicators of reliability of predicting the corrosion losses of metals are calculated for various categories of atmosphere corrosivity. It is shown that the new dose-response functions offer the highest reliability for all categories of atmosphere corrosivity.
Numerical Analysis of Single-Angle Steel Member Under Tension Force with Different End Deformations
Authors: Sayed Ahmed M.
Published: August 2020

Steel members with a single-angle cross-section are widely used, but some of their behaviours under loads are not considered by design codes, necessitating related research. This study is carried out on fifty steel single-angle members focused on the stress distribution behaviour and the ultimate axial load capacities under different end deformations through 3-dimensional Finite Element (FE) simulations and comparison with previous experimental findings. FE modeling is capable of modeling steel structures with high accuracy. Based on the results, the length of the angle affects neither the shape of the stress distribution nor the ultimate load capacity of the element. The end deformations affect the stress distribution on the member angle cross-section, including the ultimate load capacity. The end deformations which restricted deformations in the two directions perpendicular to the load axis are found to be optimal, with an average increase in load capacity by a factor of 1.96 for an equal angle and 2.21 for an unequal angle compared with the capacities calculated for single angles with deformations allowed in all directions. The appearance of a compression zone on the unconnected angle leg reduces the ultimate load capacity. The current design code (ANSI/AISC-360) can be adopted to calculate the ultimate load in the case of no deformation in the y-axis direction and no deformations in the x- and y-axis directions where the mean ratios of PNum/Pcode are 1.24 and 1.34 respectively. However, the code does not agree with the end deformations of free deformations and no deformation in the x-axis direction for either equal or unequal angles where the mean ratios of PNum/Pcode are 0.64 and 0.79 respectively, which is unsafe.