bluuebunny/crossref_metadata_2025_split huggingface dataset:
MODELAGEM MATEMÁTICA EM EDUCAÇÃO MATEMÁTICA: POSSIBILIDADES PARA OS PROCESSOS DE ENSINO E DE APRENDIZAGEM / MATHEMATICAL MODELING IN MATHEMATICAL EDUCATION: POSSIBILITIES FOR TEACHING AND LEARNING PROCESSES
Authors: Soares Maria Rosana , Junior Guataçara Dos Santos , Gualandi Jorge Henrique 
Published: April 2021

Na literatura da modelagem matemática, há diferentes procedimentos (etapas ou possibilidades de abordagens) para desenvolvê-la e explorá-la no ensino de matemática. Este artigo tem como objetivo apresentar e evidenciar as essenciais possibilidades para os processos de ensino e aprendizagem de matemática, extraídos da literatura e de atividades de modelagem desenvolvidas em um curso de licenciatura em matemática. Metodologicamente, o estudo foi amparado por análises bibliográficas e práticas, pesquisa qualitativa de cunho interpretativo e estudo de caso, utilizando materiais audiovisuais como o software Calc, o Excel, o Word e bibliotecas on-line. As coletas de dados derivaram-se da observação, da intervenção na pesquisa e dos dados analisados e extraídos de anotações, atividades feitas pelos sujeitos, consultas ao Ministério da Saúde, imagens, registros e questionários. Portanto, [...] Não consegui salvar o resumo inteiro aqui, pois apresentava erros no sistema on-line.
Morphological and Physiological Responses of Arachis hypogea L. to Salinity and Irrigation Regimes in Screen House
Authors: Tabot Pascal Tabi , Kedju Nchufor Christopher , Nyama Besingi Claudius , Abeche Achangoh Josaiah 
Published: April 2021

Aims: The K3237-80 groundnut variety from IRAD Nkolbisson is widely preferred in the Central African sub region for its sizable seeds and high yields, thus its contribution to livelihoods and food security. Apart from yield rating studies, responses to abiotic stress have not been done for this variety. The aim of this research was to investigate the responses of K3237-80 groundnut variety to salinity and water stress in screen house, in order to predict growth and yield performance under predicted conditions of soil salinity and rainfall variability.
Materials and Methods: The experimental design was a 4 by 3 factorial design. There were three levels of irrigation corresponding to 1100 mm, 2200 mm and 3300 mm crossed with four salinity levels of 0, 4, 8 and 12 ppt. Treatments were maintained till maturity and growth, yield and physiological parameters measured. Data were subjected to Factorial Analysis of Variance through the GLM approach, in the MINITAB Version 17 statistical package, followed by Spearman Rank Correlation and Factor analyses, all at α = 0.05.
Results: It was found that this variety is mildly tolerant to salinity, as growth and yield decreased at salinity levels above 4 ppt. It is however resistant to irrigation water variability which explains why it does well in all five agroecological zones of Cameroon. Both salinity and irrigation treatments significantly influenced WUE, transpiration rate and TUE (p<0.05). Water use efficiency decreased from 3.23 g/l in plants irrigated with freshwater to 1.76 g/l in plants treated with water of 12 ppt salinity. Transpiration rate increased from 0.04 l/hr/plant at 0ppt to 0.06 l/hr/plant at higher salinities, while transpiration use efficiency correspondingly decreased significantly. Correlation analysis revealed that growth, yield and biomass parameters of A. hypogea are highly salinity-driven, while transpiration and water use efficiency are highly irrigation-dependent.
Conclusion: Therefore groundnut can be grown to maturity at salinity of up to 12 ppt, the trade-off is reduced growth and yield, caused by disruptions in photosynthesis and water relations.
Accelerated Scale up of Voluntary Medical Male Circumcision within the Military Health Services in Uganda: The Race towards 2020 HIV Epidemic Control
Authors: Lugada E. , Seruwagi G. , Nyanzi A. , Lawoko S. , Bwayo D. , Kasujja V. , Lutimba B. , Rwegyema T. , Akao J. , Wamundu C. , Musinguzi A. , Asiimwe E. , Kinuthia F. K. , Kikaire B. 
Published: April 2021

Background: Scaling up Voluntary Medical Male Circumcision (VMMC) is a critical intervention in achieving HIV epidemic control by 2020. However, documentation of programmatic interventions to improve VMMC uptake among military populations, a population that is at high risk of HIV, is lacking. URC-Department of Defense HIV/AIDS Prevention Program (DHAPP) implemented a novel approach to accelerate VMMC uptake in the Ugandan military. We describe trends in VMMC uptake and associated operational costs following the intervention. We also contrast between military and civilian facilities.
Program Description: We implemented monthly mobile VMMC services throughout the country targeting soldiers, their families and surrounding communities. Records gathered during implementation were used to describe the intervention. Quantitative methods were applied to compare VMMC post intervention rates with set targets and monthly VMMC trends country-wide between military and civilian facilities over a five months period. An operational VMMC service cost analysis was applied to determine per male circumcision unit cost, excluding cost of consumables.
Lessons Learnt: Command-driven mobilization, multiple stakeholder engagement, use of mobile VMMC teams and data-driven planning increased demand for and uptake of VMMC services among the military. By the first month of intervention, VMMC performance had surpassed set monthly targets of 1,474 by 1457 circumcisions, accounting for a 99% increase (n=2,931 circumcisions) from 31% to 62% uptake. Overall VMMC performance achieved within the military was 132% in excess of set targets (n=7,408) at six months. The scaled-up operational VMMC cost per circumcision performed dropped from $15 to $7, a 47% unit cost saving within six months. While a positive trend in VMMC uptake was observed in the military facilities, the opposite was exhibited in civilian facilities over the observation period.
Conclusion: It is feasible to rapidly scale up circumcision coverage in populations served by military health facilities through mobile short term episodic VMMC services which optimize volume and efficiency. Invoking command-led mobilization and multiple stakeholder involvement is critical in demand creation and overcoming the mobile nature of the military.
Evaluation of Fresh and Thawed Semen of Pecari tajacu (Artiodactyla: Tayassuidae) in Yucatán Mexico
Authors: Rubén Montes-Pérez , Jose Mukul-Yerves , Carlos Silva-Mena , Juan Magaña-Monforte 
Published: April 2021

This research aimed to characterize the seminal properties of collared peccary Pecari tajacu before and after freezing, and to relate the morphometric measurements of the testes with sperm measurements before freezing. The study design was quasi-experimental in nature. The investigation was carried out at the Xmatkuil Wildlife Management and Conservation Unit and the Centennial Zoo in the state of Yucatan, Mexico, during the months of October to December 2001. Seventeen collared pecaries adult were electroejaculation from two captive populations. Macro and microscopic analyzes of fresh and thawed semen were carried out, also morphometric measurements of the testes, the data of sperm measurements were compared with Student´s t-test, a linear regression model was adjusted between spermatic and morphometric variables of the testis. Logistic regression was performed between seminal freezability and spermatic and morphometric variables. The ejaculate volume was 0.96 ± 0.98 ml, with 62.08 ± 19.10% sperm motility, concentration of 558.61 ± 537.04 x 106 spermatozoa / ml of fresh semen and vigor of 3.7 ± 0.58 on a scale of 1 to 5. On thawing the motility sperm was 35 ± 17.18% and 2.75 ± 0.62 vigor. The measurements of the sperm cell segments did not show a significant difference between the individuals of the two populations. Testicular width and sperm concentration were fitted to the logistic regression model with freezability (1 = yes, 0 = no). It is concluded that testicular width is a factor significantly associated with sperm motility and seminal freezability.
Hemodynamic Changes During Spinal Anesthesia with Different Bupivacaine Concentrations in Elderly Cardiac Patients Undergoing Transurethral Resection of Prostate
Authors: Elkady Omar Mohamed Fathy , Mohamed Naglaa Khalil , Salim Ahmed Esam-Eldein , Eldaba Ahmed Ali 
Published: April 2021

Background: Spinal anesthesia produces hypotension more often in elderly patients than in younger patients due to decrease systemic vascular resistance mainly. Limiting the dose (and thus, extent of anesthetic spread) to the necessary dermatomes reduces the likelihood of side effects. The aim of the study was to compare hemodynamic effects of spinal anesthesia by using different bupivacaine concentrations in elderly cardiac patients undergoing TURP.
Methods: This prospective randomized controlled double-blinded study was carried out on 60 male patients aged 65 years and above, American Society of Anesthesiologists (ASA) III, with IHD (history of MI, a history of a positive treadmill test result (ECG stress test), use of nitroglycerin, chronic stable angina for more than two months, or an ECG with abnormal Q waves), with ejection fraction (EF) 35%-50%, undergoing TURP with prostate from 100-150 gm by using bipolar resection technique and normal saline wash during surgical procedure. Patients were randomly allocated into two equal groups: Group I (Control group): received 2.5 ml bupivacaine 0.5% + 0.5 ml fentanyl (25 mcg). Group II: received 1.75ml bupivacaine 0.5% + 0.75 ml distilled water + 0.5 ml fentanyl (25 mcg).
Results: Mean arterial blood pressure was significantly decreased in group I than group II at 6, 9, 12, 15 and 30 minutes. Heart rate and peripheral oxygen saturation were insignificantly different between both groups. Ischemia occurred in 3 (10%) patients in group I and no patients in group II & the difference between both groups was insignificant. Hypotension was found significantly higher in group I than group II (P = 0.021) while PONV, bradycardia, headache, backache and shivering were insignificantly different between both groups. TURP syndrome didn’t occur in any case of our study.
Conclusions: Hyperbaric bupivacaine 8.75 mg injected at L4-L5 is sufficient to provide adequate sensory and motor block, while maintaining hemodynamic stability during TURP procedures.
The Diagnostic Performance of Chest Ultrasonography in the Up-to-date Workup in Patients with Chest Diseases
Authors: Zaablawy Esraa Mohammed El , Sherif Mohamed Fouad , Salem Faten Mohammed , Dawoud Rasha Mahmoud 
Published: April 2021

Background: Application of chest radiography for all patients with chest diseases is associated with a significant increase in total costs, exposure to radiation, and overcrowding of the emergency department in case of emergency. Ultrasound has been introduced as an alternative diagnostic tool in this regard. The aim of the work is to determine sensitivity, specificity and diagnostic accuracy of chest ultrasonography as an easy and fast form of imagery for different thoracic conditions.
Results: This prospective study was carried out on sixty patients. The majority of patients presented with lung masses (20%) and pleural effusion (16.7%). Chest US findings showed great concordance or agreement with the chest CT findings. The only lower concordance is noted in the diagnosis of pulmonary nodules or mass, where chest US reported pulmonary nodules or mass in 33.3% of patients compared to 46.7%% by chest CT. US showed a highly comparable diagnostic performance in chest-related pathological entities, compared to chest CT. Chest US had 100% sensitivity in detecting all pathological chest entities except for lung collapse (83.3%) and pulmonary nodules (71.4%). However, chest US was more specific than sensitive. It had 100% specificity in all pathological entities except for lung collapse consolidation. Chest US had 100% diagnostic accuracy in all chest-related pathological entities except for lung collapse consolidation and pulmonary nodules or masses. However, when presenting these findings among male and female patients, Chest US had better overall diagnostic accuracy among female patients than male patients.
Conclusion: US examination of the chest is a noninvasive and promising bedside tool for the examination of respiratory problems patients. Consequently, chest ultrasonography can be adjoined in the up-to-date work-up of the outpatients as an ancillary tool aiding in disease diagnosis.
Maximizing returns from enterprise manufacturing intelligence and multivariate statistical process control
Authors: Seasholtz Mary Beth , Crowley Ryan , Schmidt Alix , Zink Anna 
Published: April 2021

AbstractThis paper addresses challenges related to deploying analytics in the manufacturing environment. It discusses how to blend univariate and multivariate analyses into a deployment that can be successfully used by those not trained in Data Science. Enterprise manufacturing intelligence (EMI) has found great value in the chemical industry for aiding in timely decision making for improved plant reliability. It typically involves the use of control charts of multiple variables; that is, a univariate approach to data analysis. Another approach is to consider the data all together in a multivariate model, resulting in multivariate statistical process control (MSPC). These two approaches are complementary. Discussed in this report are guidelines for maximizing returns from EMI and MSPC deployments, including (1) considerations when setting up the MSPC model and (2) examples for how to interpret MSPC alerts, especially aimed at users who are not trained in multivariate data analysis.
Transfer learning and wavelength selection method in NIR spectroscopy to predict glucose and lactate concentrations in culture media using VIP‐Boruta
Authors: Kaneko Hiromasa , Kono Shunsuke , Nojima Akihiro , Kambayashi Takuya 
Published: April 2021

AbstractRegression models are constructed to predict glucose and lactate concentrations from near‐infrared spectra in culture media. The partial least‐squares (PLS) regression technique is employed, and we investigate the improvement in the predictive ability of PLS models that can be achieved using wavelength selection and transfer learning. We combine Boruta, a nonlinear variable selection method based on random forests, with variable importance in projection (VIP) in PLS to produce the proposed variable selection method, VIP‐Boruta. Furthermore, focusing on the situation where both culture medium samples and pseudo‐culture medium samples can be used, we transfer pseudo media to culture media. Data analysis with an actual dataset of culture media and pseudo media confirms that VIP‐Boruta can effectively select appropriate wavelengths and improves the prediction ability of PLS models, and that transfer learning with pseudo media enhances the predictive ability. The proposed method could reduce the prediction errors by about 61% for glucose and about 16% for lactate, compared to the traditional PLS model.
Design of experiments and manufacturing design space for multi‐step processes
Authors: Frieri Rosamarie , Mariti Marco , Paludi Marilena 
Published: April 2021

AbstractMost industrial processes are composed of multiple subsequent steps. In this article, we provide a statistical approach to design experiments and to define the manufacturing design space of multi‐step processes by taking into account the complex system of interactions among steps. We consider each intermediate outcome as an additional input factor in the next step and we plan experiments following a particular sequential structure. To encompass the potential deviations from the target levels of such input factors, designs are selected according to the D‐optimality in average criterion and, in order to assess their prediction capabilities, a suitable extension of the fraction of design space technique has been proposed. The manufacturing design space of the process is then defined by combining the interconnected manufacturing design spaces of the process steps and by deriving the linear combination of the process inputs that ensures the required quality standard for the final outcome. Appealing properties of this approach are also shown by the application to a three‐steps biochemical process of expression and purification of a recombinant protein in which 10 input factors are included in the design.
Stolpergefahren aufgrund der Bodenbeschaffenheit bei Evakuierungsszenarien
Authors: Herzog Daniel , Tegeler Johannes 
Published: April 2021

AbstractBei der Planung von Großveranstaltungen sind Personenstromsimulationen ein häufig verwendetes Werkzeug geworden. Dabei können viele Umgebungsparameter als Randbedingungen bereits heute berücksichtigt werden. Bisher noch unbeachtet sind Stolpergefahren in der Bodenoberfläche und der im Stolperfall resultierende veränderte Bewegungsstrom der Personen. In einer Literaturrecherche wurde der Gangzyklus und die maßgebliche Störung (visuell und motorisch), die zum Stolpern führt, analysiert. Ein Höhenunterschied von 12,9 ± 4,5 mm kann eine Person zum Stolpern bringen. Je nach Personendichte ist die Auswirkung auf den Bewegungsstrom und die betroffenen und umgebenden Personen unterschiedlich gravierend. Rechtlich gesehen stellt in Deutschland, basierend auf bisherigen Gerichtsurteilen, eine Abweichung des Bodenniveaus von 2,0 bis 2,5 cm eine Verletzung der Verkehrssicherungspflicht dar. Um die Gefahr und die folgenden Auswirkungen eines Stolperfalls auf die Evakuierung von Großveranstaltungen besser in die Planung und Simulation einfließen lassen zu können, sollte ein Faktor für Oberflächen entwickelt werden, der Oberflächenunregelmäßigkeiten und Stolperstellen berücksichtigt.
Trittschallpegelminderung, Schalldämm‐Maße und Trittschallpegel von Fertigbädern
Authors: Eßer Georg , Keil Moritz , Porowski Piotr 
Published: April 2021

AbstractSchon seit Jahrzehnten werden im Bauwesen Fertigbäder verwendet, die als geschlossene Elemente im Werk mit allen Installationen, Objekten, Wandverkleidungen und Accessoires montiert und am Bau nur noch aufgestellt und angeschlossen werden müssen. Fertigbäder liegen als Betonzellen aber auch als Stahlblechkonstruktionen, die am Bau eine Verkleidung aus Gipskartonbauplatten erhalten, vor. In der DIN 4109 ist kein Bauteilkatalog für Fertigbäder enthalten, sodass Hersteller derartiger Fertigbäder Prüfzeugnisse über den Schallschutz vorlegen müssen. Diese Prüfzeugnisse beinhalten zum größten Teil die bewertete Trittschallpegelminderung, um auf Basis der Stahlbeton‐Rohdecke den bewerteten Norm‐Trittschallpegel prognostizieren zu können. Es liegen aber auch Prüfergebnisse über die Schalldämm‐Maße der Trennwände und vom Komplettsystem am Bau vor. Folgend werden die aus einer Vielzahl von Messungen gewonnenen Erkenntnisse über die Schallschutzeigenschaften von Fertigbädern zusammengefasst.
Psoas hitch procedure in 166 adult patients: The largest cohort study before the laparoscopic era
Authors: Groen V. H. , Lock M. T. W. T. , de Angst I. B. , Verhagen P. C. M. S. , Horenblas S. , Dik P. , Bosch J. L. H. R. 
Published: April 2021

AbstractObjectivesTo present the short‐term and long‐term outcomes of the psoas hitch procedure in a large cohort with long‐term follow‐up.Patients and methodsA multicenter, retrospective cohort study was conducted. Patients were included if they had undergone an open psoas hitch procedure with ureteral reimplantation for different types of distal ureteral pathology between 1993 and 2017. Clinical failure was defined as radiologically‐proven obstruction of the ureteroneocystostomy and/or post‐operative complaints requiring additional surgery. Pre‐operative demographic data and post‐operative radiological imaging were collected. Complications were categorized as peri‐operative, acute (<30 days), and long‐term complications.ResultsA total of 166 patients had undergone a psoas hitch procedure, with a median follow‐up of 15 months (IQR 6‐45). Indications for the procedure included intra‐operative injury of the ureter during gynecological, urological or general surgery, transitional cell carcinoma of the distal ureter, fistulae, (radiation) fibrosis, and trauma. There was no significant difference in pre‐ and post‐operative estimated glomerular filtration rate. Post‐operative complications included urinary leakage, recurrent urinary tract symptoms, recurrent malignancy, and kidney failure. Postoperative imaging was available in 143 patients. Failure of the psoas hitch procedure was seen in 8% (11/143) of the patients. In 55% (6/11) of these patients, radiation fibrosis was the indication for the psoas hitch procedure.ConclusionThis study provides greater insight into the long‐term complications of the open psoas hitch procedure in adults. The psoas hitch procedure can be considered a safe procedure for restoring the continuity of the ureter for different types of ureteral pathologies in adult patients. However, patients with a history of radiation therapy causing retroperitoneal fibrosis might be more prone to failure after the procedure.
Kopfbolzenverankerungen in mit CFK‐Bewehrung vorgespannten dünnwandigen Hochleistungsbetonfertigteilen
Authors: Ebschner Peter , Kautzsch René , Lämmlein Tobias , Holschemacher Klaus , Terrasi Giovanni 
Published: April 2021

AbstractEin Betonfertigteilprodukt mit dem Namen Carbolith© wird von Sacac, einem Hersteller für Betonfertigteile und Schleuderbetonmaste, in der Schweiz hergestellt. Es handelt sich um mit kohlenstofffaserverstärkten Kunststoffen (CFK) bewehrte, vorgespannte Hochleistungsbetonfertigteile (HPSCC). Die Ursprünge dieser Entwicklung gehen auf Mitte der 1990er Jahre zurück [1]. Neben dem Mastbau erschloss sich im Fassadenbau ein weiteres Anwendungsgebiet [2]. Neben gestalterischen Gründen bestand der Wunsch, leichtere und dauerhaft korrosionswiderstandsfähige Bauteile einzusetzen. In nachfolgenden Forschungsprojekten wurden gezielt Fragestellungen nach einer Materialoptimierung (Betonrezeptur, Matrixzusammensetzung, Oberflächenbeschaffenheit der CFK‐Spannbewehrung), der Vorspanntechnologie und deren Lasteinleitung (Keiloptimierung), einer Erhöhung des Vorspanngrads und dem Verhalten unter Brandbeanspruchung nachgegangen [3].In den Jahren 2012–2015 wurde das Thema der Lasteinleitung in dünnwandige, mit Carbon vorgespannten HPSCC‐Profile an der Empa bearbeitet, weil es während der Projektierung stets einiger Improvisation und ingenieurmäßigen Geschicks bedurfte. Es gab weder zuverlässig anwendbare Bemessungsnormen, noch waren für die Lasteinleitung zugelassene Verankerungsprodukte verfügbar. Im folgenden Artikel wird über experimentelle Arbeiten berichtet, die dem Einsatz von Kopfbolzendübeln als Verankerungsmittel in Verbindung mit durch Carbon vorgespannten HPSCC‐Profilen dienen sollen.