bluuebunny/crossref_metadata_2025_split huggingface dataset:
Aplicação de técnicas termoanalíticas (TGA/DTA) para avaliação do comportamento térmico de amostras de argilas para obtenção de pozolanas
Authors: Medeiros Jean Luis Gomes de , Morais Crislene Rodrigues da Silva 
Published: July 2020

<p>A busca por materiais que sejam empregados na construção civil de forma sustentável, tanto do ponto de vista ambiental como em relação a durabilidade e resistência, tem sido motivo de muitas pesquisas. As argilas termicamente ativadas ganharam importância como uma fonte de material cimentício suplementar, uma vez que apresentam vantagens ambientais, como redução da emissão de CO<sub>2</sub>, econômicas, devido à redução do consumo de energia para produção de cimentos, e técnicas, uma vez que melhoram a resistência e a durabilidade dos concretos e argamassas, além da abundância na natureza. Neste trabalho, é avaliado o comportamento térmico de três argilas do litoral sul da Paraíba. As amostras das argilas foram submetidas a um tratamento térmico para as temperaturas de 600 ºC, 700 ºC e 800 ºC e analisadas pelas técnicas termoanalíticas (TGA/DTA). As argilas foram caracterizadas físico-química e mineralogicamente, antes e após o tratamento térmico, e foram classificadas como material pozolânico tipo N, de acordo com as exigências químicas da Norma NBR 12653/2015. Os estudos térmicos das amostras de argila indicam que, nas temperaturas de calcinação de 600 °C e 800 °C, as perdas de massa observadas foram muito pequenas, da ordem de 2%, enquanto que, na temperatura de calcinação de 700 °C, grandes perdas de massa foram verificadas, principalmente para as amostras JPS2 e JPS3, com valores de 7,41% e 11,02%, respectivamente.</p>
DO TIME MANAGEMENT FACTORS IMPEDE STUDENTS’ ACADEMIC ACHIEVEMENT? : A CASESTUDY – SOHAR UNIVERSITY, OMAN
Authors: Alani Farooq Salman , Khan Firdouse Rahman , Hawas Abdulrazzaq Tuama 
Published: July 2020

Purpose: The objective of the research study is to critically analyze the factors impeding time management towards students’ academic performance achievement.
Design/methodology/approach: The study was carried out using a well-defined questionnaire collecting samples from 164 undergraduate students studying in the Faculty of Business, Sohar University, Sultanate of Oman from a population of 700 undergraduate students. For the study, the cluster-sampling method was adopted. SPSS was used to perform the statistical analysis.
Findings: The empirical results reveal that none of the claimed factors related to time management influence the academic performance of the students. The students’ performance is purely based on their efforts and on their own self-management. Thus, it was concluded that it is the responsibility of the students to manage their time for which they should make their own plans.
Practical Implications: The study confirms that the student's stay at the hostel facilitates them to improve their academic performances. It is also interpreted that the students are carried away by the domestic work during their stay at home, parents should take utmost not to deprived of their time for study. Parents should make necessary arrangements to reduce their travel time. Students should have their own self-control and self-commitment to manage and plan their own time for study purposes.
Originality/value: The research work is of its first kind as it focuses on the impact of time management factors on the academic performances of the students.
Embarazo triple - Conjugado - Superfetación
Authors: Zabaleta Lombana Alberto , Milanés Pernett Jorge 
Published: July 2020

Presentamos un caso de embarazo triple que proponemos denominar "conjugado" : ectópico tubario bilateral e intrauterino, único hasta ahora relatado pues que no encontrarnos ocurrencia igual en la bibliografía consultada en el lndex Medicus hasta la edición de diciembre de 1962.Como corolario que constituye en verdad el motivo de esta comunicación, está el hecho de la superfetación del huevo tubario izquierdo permitiéndonos tal afirmación las características físicas de los fetos, su aspecto saludable y las condiciones de vitalidad de sus anexos.
Anemia ferropénica y embarazo
Authors: Acosta Bendek Eduardo , Barrios Salcedo Manuel , Hazbun Hirezi Carlos 
Published: July 2020

Etimológicamente la palabra anemia significa "sin sangre", pero clínicamente se entiende por ella toda reducción de los valores normales de los glóbulos rojos ( Gs. Rs. ) , de la hemoglobina (Hb.') y del hematocrito (Ht.) . El volumen sanguíneo (V. S.) puede reducirse enormemente como en la hemorragia aguda, pero puede permanecer estacionario o aumentar como sucede durante el embarazo. A la eritroponia se le llama también oligocitemia; a la disminución de la Hb., oligocronemia y a la reducción del V. S. oligohemia. Sin embargo, tales términos son poco usados.
Tuberculosis genital
Authors: Durán Velasco Fabio , Arenas Buenahora Isaías , Rey Rey Primitivo 
Published: July 2020

No obstante habérsenos designado para elaborar un correlato al tema Tuberculosis genital, y a pesar de haber tenido la mejor buena voluntad de realizarlo, múltiples factores adversos no nos permitieron traer a esta reunión un trabajo digno del nivel científico de este certamen y nos fue imposible llevar a cabo una verdadera investigación en la búsqueda de esta enfermedad, por limitaciones de laboratório y de orden económico en nuestro medio hospitalario.
Mola hidatiforme. Revisión de 91 casos clínicos en el Hospital Universitario. Unidad Obstétrica
Authors: Valencia Hurtado Fernando , Góngora Sánchez Humberto , Vélez Ramírez Octavio , Mejía Vieira Fabio , Mejía Rojas Eduardo 
Published: July 2020

El propósito de este trabajo sobre mola hidatiforme es presentar una revisión discriminativa de 91 casos que se han presentado en la Unidad Obstétrica del Departamento de Obstetricia y Ginecología del Hospital Universitario de Caldas, Facultad de Medicina, en el período comprendido entre el 19 de enero de 1957 al 30 de junio de 1963 .
Abruptio placentae. Análisis clínico de 132 casos
Authors: Ochoa M. Germán , Restrepo A. Luis Fernando 
Published: July 2020

1 . Se presentan 132 casos de abruptio placentae, ocurridos en el Hospital Universitario San Vicente de Paúl y en el l. C. S. S., de Medellín, durante los años de 1961 , 62 y primer semestre del 63.2 . La frecuencia es de 1 por 300 (3 .3% ).3. Los síntomas y signos más frecuentes son hemorragia externa. dolor abdominal, hipertonía y sensibilidad uterina . El 64.4% ingresan en trabajo de parto.4 . La toxemia se asocia al abruptio en 22.0%.5. El hidramnios, el embarazo múltiple y el cordón corto no aparecen como factores causales. El trauma lo es en 2 casos.6. El 58.5 % de las pacientes son mayores de 29 años.7. El 93 % de las pacientes son múltíparas, y 58.5% tienen más de 5 partos .
Early Effects of the COVID-19 Pandemic on Family Planning Utilisation and Termination of Pregnancy Services in Gauteng, South Africa: March–April 2020
Authors: Adelekan Tsholofelo , Mihretu Belete , Mapanga Witness , Nqeketo Sithembile , Chauke Lawrence , Dwane Zuko , Baldwin-Ragaven Laurel 
Published: July 2020

Abstract

Background: Experiences from infectious outbreaks globally, such as Ebola and severe acute respiratory syndrome (SARS), highlight the challenges of government to maintain essential healthcare services, guarantee healthcare access and at the same time shift resources to contain and mitigate the crisis.
The declaration of the State of Disaster in South Africa due to the COVID 19 pandemic (on the 15th of March) and the subsequent imposition of a total national lockdown on all usual activities were anticipated to have both direct and indirect negative consequences on healthcare utilisation including reproductive healthcare services.

Objective: The objective of this study is to describe the effect of the COVID-19 pandemic on family planning and termination of pregnancy services utilisation immediately following the lockdown in Gauteng Province.

Methods: We analysed the administrative data on clinical services utilisation during the previous two years, including five weeks following the enforcement of the lockdown in South Africa, from the District Health Information System database over the period 1 April 2018–30 April 2020.

Results: Primary healthcare utilisation headcounts across the province declined by nearly 500,000 visits following the lockdown period. Family planning utilisation patterns which are demand-driven declined during the two months preceding the COVID-19 pandemic and further declined during the lockdown. Switching contraceptive methods to those with less effectiveness were noted as a trend over the previous two years. Year on year comparisons from April 2018 to April 2020 indicated a consistent decline in the use of injectable methods and increased use of oral contraceptive pills.

Conclusion: This review highlights the importance of monitoring the utilisation of routine healthcare services during the outbreak situations to ensure that service provision is not compromised. Women of reproductive age must be able to exercise their reproductive choices to prevent unintended pregnancies and to reduce their risk of mortality as a result of diminished access to reproductive healthcare services.
Mud-clast armoring and its implications for turbidite systems
Authors: Hizzett Jamie L. , Sumner Esther J. , Cartigny Matthieu J.B. , Clare Michael A. 
Published: July 2020

ABSTRACT
Seafloor sediment density flows are the primary mechanism for transporting sediment to the deep sea. These flows are important because they pose a hazard to seafloor infrastructure and deposit the largest sediment accumulations on Earth. The cohesive sediment content of a flow (i.e., clay) is an important control on its rheological state (e.g., turbulent or laminar); however, how clay becomes incorporated into a flow is poorly understood. One mechanism is by the abrasion of (clay-rich) mud clasts. Such clasts are common in deep-water deposits, often thought to have traveled over large (more than tens of kilometers) distances. These long travel distances are at odds with previous experimental work that suggests that mud clasts should disintegrate rapidly through abrasion. To address this apparent contradiction, we conduct laboratory experiments using a counter rotating annular flume to simulate clast transport in sediment density flows. We find that as clay clasts roll along a sandy floor, surficial armoring develops and reduces clast abrasion and thus enhances travel distance. For the first time we show armoring to be a process of renewal and replenishment, rather than forming a permanent layer. As armoring reduces the rate of clast abrasion, it delays the release of clay into the parent flow, which can therefore delay flow transformation from turbidity current to debris flow. We conclude that armored mud clasts can form only within a sandy turbidity current; hence where armored clasts are found in debrite deposits, the parent flow must have undergone flow transformation farther up slope.
PLANT TAPHONOMY IN A LAKE AFFECTED BY VOLCANISM (AGUA DE LA ZORRA FORMATION, UPPER TRIASSIC) MENDOZA, ARGENTINA
Authors: PEDERNERA TOMÁS E. , MANCUSO ADRIANA C. , BENAVENTE CECILIA A. , OTTONE EDUARDO G. 
Published: July 2020

ABSTRACTVolcanic eruptions have an impact on the paleoecology of plant communities and their preservation in the fossil record. The aim of this contribution is to evaluate the influence of volcanism on plant preservation in lacustrine settings via systematic sampling and chemical analyses of fossil plants in the Upper Triassic Agua de la Zorra Formation, of the Argentinian Cuyana Basin. Plant remains are not uniformly preserved throughout the Agua de la Zorra Formation and their stratigraphic distribution reflects the original spatial pattern of the plant communities. SEM-EDX analyses was used to demonstrate how volcanism affected diagenesis of the plant remains. Eight taphonomic modes were determined from biostratinomic analysis, and three preservational modes from the chemical features observed in the SEM-EDX spectra. The three preservation modes recognized by SEM-EDX analysis are more likely linked to diagenesis and are not equivalent to the taphonomic modes described based on the biostratinomic features. The Agua de la Zorra paleolake preferentially preserved plant material because of anoxic conditions in deeper parts of the lake, and a high sedimentation rate in proximal near-shore facies. The plant remains are most abundant in sandy facies deposited by high-energy flows but there is no evidence that these flows were pyroclastic nor that the plant remains were generated by volcanic trauma.
The SPARKLE registry: protocol for an international prospective cohort study in patients with alpha-mannosidosis
Authors: Hennermann Julia , Guffon Nathalie , Cattaneo Federica , Ceravolo Ferdinando , Borgwardt Line , Lund Allan M. , Gil-Campos Mercedes , Tylki-Szymanska Anna , Muschol Nicole M. 
Published: July 2020

Abstract
Background: Alpha-mannosidosis is a lysosomal storage disorder caused by reduced enzymatic activity of alpha-mannosidase. SPARKLE is an alpha-mannosidosis registry intended to obtain long-term safety and effectiveness data on the use of velmanase alfa during routine clinical care in patients with alpha-mannosidosis. It is a post-approval commitment to European marketing authorization for Velmanase alfa (Lamzede®), the first enzyme replacement therapy for the treatment of non-neurologic manifestations in patients with mild to moderate alpha-mannosidosis. In addition, SPARKLE will expand the current understanding of alpha-mannosidosis by collecting data on the clinical manifestations, progression, and natural history of the disease in treated and untreated patients, respectively.Results: The SPARKLE registry is designed as a multicenter, multinational, noninterventional, prospective cohort study of patients with alpha-mannosidosis, starting patient enrollment in 2020. Patients will be followed for up to 15 years. Safety and effectiveness as post-authorization outcomes under routine clinical care in patients with treatment will be evaluated. The primary safety outcomes are the rate of adverse events (anti-velmanase alfa-immunoglobulin G antibody development, infusion-related reactions, and hypersensitivity). Secondary safety outcomes include the evaluation of medical events, change in vital signs, laboratory tests, physical examination, and electrocardiogram results. The primary effectiveness outcome is a global treatment response rate, evaluated as the individual aggregate of single endpoints from pharmacodynamic, functional, and quality of life effectiveness outcomes; secondary effectiveness outcomes are to characterize the population of patients with alpha-mannosidosis with regard to clinical manifestation, progression, and natural history of the disease. Any patient in the European Union with a diagnosis of alpha-mannosidosis who is willing to participate will likely be eligible for inclusion in the registry. Publications to disseminate scientific insights from the registry are planned. Conclusion: This study will provide real-world data on the long-term safety and effectiveness of velmanase alfa in patients with alpha-mannosidosis during routine clinical care and increase the understanding of the natural course, clinical manifestations, and progression of this ultra-rare disease.
Modeling the Cost-effectiveness of Esophageal Cancer Screening in China
Authors: LI Yuanyuan , Du Lingbin , Wang Youqing , Gu Yuxuan , Zhen Xuemei , Hu Xiaoqian , Sun Xueshan , Dong Hengjin 
Published: July 2020

Abstract
Background : This study aimed to examine the cost-effectiveness of standard endoscopic screening with Lugol’s iodine staining for EC (esophageal cancer) screening in China. Methods : A Markov decision analysis model with eleven states was built. Individuals aged 40 to 69 years were classified into six age groups according to five-year intervals. Three different strategies were adopted for each cohort: (1) no screening; (2) endoscopic screening with Lugol’s iodine staining with annual follow-up for low-grade intraepithelial neoplasia; and (3) endoscopic screening with Lugol’s iodine staining without follow-up. Quality-adjusted life-years (QALYs) indicated the effectiveness . The incremental cost-effectiveness ratio (ICER) was used as the evaluating indicator. Sensitivity analysis was performed to assess the robustness of the model. Results : Screening with follow-up was the undominated strategy, which saved USD 10942.57 and USD 6611.73 for individuals aged 40-44 and 45-49 years, respectively, per QALY gained. For those aged 50-69 years, the nonscreening scenarios were undominated. Screening without follow-up were extended dominated strategies. Compared to screening strategies without follow-up, all the follow-up strategies were found to be cost effective, with the ICER increasing from 299.57 USD/QALY for individuals 40-44 years to 1617.72 USD/QALY for individuals 65-69 years. Probabilistic sensitivity analysis supported the results of the base case analysis. Conclusions : EC screening with follow-up targeting individuals aged 40-49 years was the most cost-effective strategy.
Succeeding with prolonged usage of consumer-based activity trackers in clinical studies: A mixed methods approach
Authors: Henriksen André , Sand Anne-Sofie , Deraas Trygve , Grimsgaard Sameline , Hartvigsen Gunnar , Hopstock Laila 
Published: July 2020

Abstract
Background: Lack of physical activity (PA) is a risk factor for death and non-communicable disease. Despite this, more than one fourth of adults worldwide do not follow PA guidelines. As part of a feasibility study to test a complex intervention for increasing PA, we included a consumer-based activity tracker (AT) as a tool to measure PA outcomes and to track heart rate during exercise sessions. The aim of the present study was to identify factors that increase wear time when using a consumer-based AT for monitoring of participants in clinical research. Methods: Sixteen participants aged 55-74 years, with obesity, sedentary lifestyle, and elevated cardiovascular risk were recruited to a 12-month feasibility study. Participants wore a Polar M430 AT to collect continuous PA data during a six-month intervention followed by six months of follow-up. We performed quantitative wear time analysis, tested the validity of the AT, and completed two rounds of qualitative interviews to investigate how individual wear-time was linked to participant responses. Results: From one year of tracking, mean number of valid wear days were 292 (SD=86), i.e. 80%. The Polar M430 provides acceptable measurements for total energy expenditure. Motivations for increased wear time were that participants were asked to wear it and the ability to track PA progress. Perceived usefulness included time keeping, heart rate- and sleep tracking, becoming more conscious about day-to-day activity, and improved understanding of which activity types were more effective for energy expenditure. Sources of AT annoyance were measurement inaccuracies and limited instruction for use. Suggestions for improvement were that the AT was big, unattractive, and complicated to use.Conclusions: Adherence to wearing a consumer-based AT was high. Results indicate that it is feasible to use a consumer-based AT to measure PA over a longer period. Potential success factors for increased wear time includes adequate instruction for AT use, allowing participants to choose different AT designs, and using trackers with accurate measurements. To identify accurate trackers, AT validation studies in the target cohort may be needed. Trial registration: U.S. National Library of Medicine, Clinical Trial registry: NCT03807323; Registered 16 September 2019 – Retrospectively registered, https://clinicaltrials.gov/ct2/show/NCT03807323
Social Determinants of Mental Health Care Systems: Intensive Community Based Care in The Veterans Health Administration
Authors: Bhalla Ish P , Stefanovics Elina A , Rosenheck Robert A 
Published: July 2020

Abstract
Background: Since deinstitutionalization in the 1950s-1970s, public mental health care has changed its focus from asylums to general hospitals, outpatient clinics and specialized community-based programs addressing both clinical and social determinants of mental health. Analysis of the place of community-based programs within a comprehensive health system such as the Veterans Health Administration (VHA) may illuminate the role of social forces in shaping contemporary public mental health systems. Methods: National VHA administrative data were used to compare veterans who exclusively received outpatient clinic care to those receiving four types of specialized community-based services, addressing: 1) functional disabilities from severe mental illness (SMI), 2) justice system involvement, 3) homelessness, and 4) vocational rehabilitation. Bivariate comparisons and multinomial logistic regression analyses compared groups on demographics, diagnoses, service use, and psychiatric prescription fills. Results: An hierarchical classification of 1,386,487 Veterans who received specialty mental health services from VHA in Fiscal Year 2012, showed 1,134,977 (81.8%) were seen exclusively in outpatient clinics; 27,931 (2.0 %) received intensive SMI-related services; 42,985 (3.1%) criminal justice services; 160,273 (11.6%) specialized homelessness services; and 20,921 (1.5%) vocational services. Compared to those seen only in clinics, veterans in the four community treatment groups were more likely to be black, diagnosed with HIV and hepatitis, had more numerous substance use diagnoses and made far more extensive use of mental health outpatient and inpatient care. Conclusions: Almost one-fifth of VHA mental health patients receive community-based services prominantly addressing major social determinants of health and multimorbid substance use disorders.
Comparison of the clinical effect between the lower sternal incision and the left parasternal fourth intercostal incision in the transthoracic closure of ventricular septal defect
Authors: Ma Jun , Shangguan Wenlin , Chen Liang-wan , Liao Dong-Shan 
Published: July 2020

Abstract
Background: To analyze the clinical effect of two different ways of minimally invasive transthoracic closure in children with ventricular septal defect (VSD) Methods: From January 2015 to July 2019, 294 children with VSD were enrolled in the Fujian Medical University Union Hospital, who underwent VSD closure through the left sternal fourth intercostal incision (group A: n = 95) and the lower sternal incision (group B: n = 129) Results: The operation time, bleeding volume, postoperative mechanical ventilation time, postoperative ICU monitoring time, postoperative hospitalization time and complication rate in group A were significantly lower than those in group B (P < 0.05). There was no significant difference between the two groups in the operation success rate, mechanical ventilation time and total hospitalization cost (P > 0.05). Conclusion : The transthoracic closure of ventricular septal defect through the left sternal fourth intercostal incision is feasible, safe, cosmetic, and worth popularizing.