bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modelamiento matemático de la extracción asistida con ultrasonido de compuestos bioactivos presentes en la cebolla (Allium cepa L.): revisión y análisis teórico
Authors: Gómez Córdoba Elizabeth , Jiménez Panchalo Angie Lorena , Vallejo Castillo Vladimir Ernesto 
Published: October 2021

Objetivo: Establecer un modelamiento matemático de la extracción asistida con ultrasonido de compuestos bioactivos presentes en la cebolla de bulbo. De esta manera tener bases sólidas para aplicar el modelo obtenido en posteriores investigaciones y procesos de obtención de compuestos bioactivos en dicha materia prima. Con este modelo se podría predecir resultados en cuanto al rendimiento en un tiempo establecido, para así facilitar la toma de decisiones en el proceso de extracción.
Metodología o método: Se realizó una revisión bibliográfica de modelos matemáticos de la cinética de extracción asistida por ultrasonido de cebolla. A continuación, se determinaron los parámetros de cinética de extracción teóricos a partir de una referencia bibliográfica con el fin de establecer el modelo matemático más adecuado para representar la cinética de extracción.
Resultados: A partir del análisis estadístico para todos los modelos evaluados se obtuvo valores de coeficiente de determinación (R2) superiores a 0,98, sin embargo el modelo que presento mayor ajuste y un menor valor para la raíz del error cuadrático medio (RMSE) fue aquel que se fundamenta en la segunda ley de Fick.
Conclusiones: La alta precisión del modelo matemático seleccionado permitió predecir con un nivel de confianza del 95 % el rendimiento de la extracción asistida por ultrasonido de la cebolla de bulbo.
Condiciones acústicas en las aulas de clase: Una revisión de la literatura
Authors: Durán Urón Armando Engels , Jimeno Martínez Marjith Gabriela , Rodríguez Barraza Daniela Sofía , Meléndez Serrano Angie Isabel , Palacios Alvarado Wlamyr , Mendoza Cáceres Daniel Alfonso 
Published: October 2021

Resumen
Objetivo: Realizar una revisión de la literatura relacionada con normas y criterios utilizados en la acústica de las aulas de clase y las variables de estudio de tiempo de re verberación, inteligibilidad de la palabra y ruido de fondo. Metodología o método: Se realizó una búsqueda de artículos en la base de datos Scopus, publicados entre enero de 2015 y agosto de 2020, relacionados con la calidad acústica en las aulas de clase cuyas variables de estudio fueran el tiempo reverberación, inteligibilidad de la palabra y/o ruido de fondo. Posteriormente se estudió y analizó el contenido de cada uno de ellos. Resultados: La literatura recopilada mostró que el 31.1% de los estudios evaluaron el tiempo de reverberación y que así mismo, este es el parámetro que se incumple en mayor medida. Se identificó que la calidad acústica en las aulas de clase es predominantemente mala. El 37.8% de las causas de disconfort acústico en las aulas estuvieron asociadas a la ausencia de materiales de absorción acústica. Conclusiones: Se concluye que la cantidad de estudios en calidad acústica de los recintos educativos es significativa, y que éstos, muestran la necesidad de mejoras en los aspectos constructivos de las instituciones. Además, se encontró que la calidad acústica puede tener impactos en la percepción de bienestar y en la salud de los estudiantes y profesores. Se evidenció la utilización de métodos matemáticos como algoritmos y simulaciones para la identificación de mejoras en la acústica de los centros educativos.
Effect of aquatic exercise on cardiovascular fitness in people with type 2 diabetes mellitus: a systematic review and meta-analysis
Authors: Zhu Haifeng , Jin Jing , Zhao Gaonian 
Published: October 2021

Aims To systematically review and meta-analyze the impact of aquatic exercise (AE) on cardiovascular health in patients with type 2 diabetes mellitus (T2DM).Material and methods Relevant literature about AE in patients with T2DM up to May 25, 2021, were collected from the PubMed, the Cochrane, EMBASE, Web of Science, and Ovid databases. The main outcomes were 6‑min walking distance (6MWD) and maximal oxygen uptake (VO2max). Secondary outcomes were resting heart rate (RHR) and resting systolic (RSBP) and diastolic blood pressures (RDBP).Results 12 articles including 320 participants were identified. Among them, three trials compared AE to land-based exercise (LE), six compared AE to non-intervention control (Ctrl), and three were pre- / post-AE design without a control group. Meta-analysis showed that compared with baseline, VO2max increased (WMD=0.71, 95 %CI 0.47 to 0.94), while RHR, RSBP and RDBP declined (WMD=–5.88, 95 %CI –6.88 to –4.88; WMD=–5.76, 95 %CI –7.75 to –3.78; WMD= -2.48, 95 %CI –3.83 to –1.13, respectively) post-AE. 6WMD and VO2max increased (WMD=127.00, 95 %CI 49.26 to 204.74; WMD=2.02, 95 %CI 1.66 to 2.38, respectively) and RHR declined (WMD=-4.20, 95 %CI –6.36 to –2.03, AE vs Ctrl) when AE was compared to Ctrl. There were no significant differences in the above indicators between AE and LE.Conclusions AE, like LE, increases VO2max, and reduces RHR, RSBP, and RDBP. These responses may improve cardiovascular health in patients with T2DM. However, more data are needed to confirm the effect of AE on 6MWD in T2DM patients.
Exploring Village Funds Management on The Perspective Capacity Village Apparatus’s of Bengkulu Province in 2018-2019
Authors: Darmi Titi , Mujtahid Iqbal Miftakhul 
Published: October 2021

This study aimed to determine the extent to which the village apparatus’s capacity can manage village funds. This study used qualitative and quantitative approaches, namely frequency percentage statistics. Results of distribution utilized the total score of the answers. Data sources included primary and secondary data. Data sources included primary and secondary data. The object of research is 30 (thirty) villages, 2 respondents from each village are taken. Findings demonstrate that the village apparatus’s capacity in managing village funds is generally assessed from their basic Capability, management capability, and technical Capability, which fall into the ‘fair’ category. It indicates that the village apparatus needs to increase its capacity so that village funds can be managed optimally. The solutions include increasing the HR-village apparatus’s capacity through computer training, technical guidance, seminars, and socialization of related regulations. Besides, facilitation and mentoring are the best ways that the village apparatus needs to increase their capacity, considering that stakeholders are demanding a change in the paradigm of implementation in village governance and the era of disruption to balance and harmonize with current and future conditions.
Analisis Uji Kemampuan Komposit Berbahan Dasar Limbah Dalam Fungsi Penyerapan Suara
Authors: Hidayah Nur Yulianti , Rimantho Dino , Sundari Anggina Sandy , Herzanita Ayu 
Published: October 2021

Peningkatan permasalahan lingkungan baik berupa masalah kebisingan maupun limbah padat organik dan anorganik memunculkan berbagai upaya untuk menanganinya. Di sisi lain terjadi peningkatan penggunaan komposit di segala bidang merupakan rekayasa bahan yang banyak dilakukan peneliti untuk mendapatkan bahan alternatif yang baru. Adapun tujuan dari penelitian ini adalah untuk mengetahui apakah kemampuan papan komposit akustik berbahan dasar limbah organik dan anorganik memiliki kemampuan menyerap suara yang sama baik ditinjau dari parameter ketebalan. Pengujian dilakukan dengan mengukur tingkat kebisingan suara pada chamber sebelum dan setelah dipasang papan komposit. Nilai Loss diperoleh dengan mengurangkan tingkat suara yang masuk ke chamber sebelum media akustik dipasang dan suara yang diterima/dipantulkan setelah dipasang media akustik (papan komposit). Dari hasil pengujian diperoleh nilai koefisien penyerapan bunyi di semua variasi ketebalan spesimen komposit menghasilkan nilai yang baik pada frekuensi 125 Hz dan 500 Hz.
Knowledge, perception and willingness to receive the current COVID-19 vaccine among residents of Awka metropolis, Anambra State, Nigeria
Authors: Obi-Ezeani Chikaodili N. , Ilechukwu Obianuju U. , Onuora Ifeoma J. , Umeaba Georgina N. , Onuike Amuche L. , Onyegbule Onyema A. , Muoneke Nkolika M. , Nwagbara Ijeoma J. , Nnoruka Obiageli E. , Odo Malachi O. 
Published: October 2021

Background: Vaccines can effectively reduce most morbidities and mortalities caused by infectious agents. The emergence of the COVID-19 vaccine may be accompanied with huge success in containing the pandemic. The aim of the study was to assesses knowledge, perception and willingness to receive the current COVID-19 vaccine among residents in Awka metropolis, Anambra State, Nigeria.Methods: Using a pre-tested semi-structured questionnaire, this study was conducted in Awka metropolis Anambra State, Nigeria among 393 respondents (aged 18 years and above), and analyzed to assess their knowledge, perception and willingness to receive the current COVID-19 vaccine. Statistical package for social sciences software (SPSS) version 23.0 was used, descriptive statistics were reported in frequencies and percentages, Chi-square test was used to assess the association between socio-demographic characteristics and willingness to receive the vaccine, and level of significance was set at p<0.05.Results: The results showed that all respondents (100%) have good knowledge of the vaccine availability. Only 25.7% were willing to receive the vaccine, although 57.3% were willing to receive any other vaccine apart from the COVID-19 vaccine. Very few respondents (18.3%) thinks the vaccine is accessible to all. Most of the respondents (72%) did not support mandatory implementation of COVID-19 vaccine in Nigeria. Among the socio-demographic characteristics, only occupation was significantly associated with willingness to receive the vaccine (p=0.010, χ2=20.214). Conclusions: This study highlighted the need to effectively educate the masses through appropriate public health literacy programs and enlightenment campaigns on the role of the vaccine in curbing this pandemic.
A prospective study on the role of centchroman in regression of fibroadenoma
Authors: Singla Navdeep Kumar , Bhatia Ruby , Verma Renu , Bhatia Suresh Kumar 
Published: October 2021

Background: Fibroadenoma commonly present as painless breast lump in young girls. Nearly 10-15% regress spontaneously over the period of 6-60 months, rest are managed surgically. Centchroman (Saheli), a novel non-steroidal, selective anti-estrogen has been used for the treatment of mastalgia and its effectiveness in the treatment of fibroadenoma is being tested in the ongoing trials. Methods: A total of 60 patients between 15-35 years of age with painless lump breast of size 2 to 5 centimeters confirmed as fibroadenoma by fine needle aspiration cytology (FNAC) were included in the study. Detailed patient's characteristics, clinical history, physical examination (for size in 2 dimensions), ultrasound findings (for size in 3 dimensions) were assessed. All participants included in the study were given tablet Centchroman (Saheli) 30 mg thrice weekly orally for 3 months. Size of Fibroadenoma was reassessed clinically for size in two dimensions and ultrasonologically for size in three dimensions at 4 weeks and 3 months of starting of therapy.Results: Out of 60 patients, 18 patients (30%) had complete response, 40 patients (66.66%) showed a decrease in the size of fibroadenoma and only 2 patients (3.33%) had no response to this therapy. None showed an increase in size.Conclusions: It may prove to be the most effective modality for the treatment of small sized fibroadenoma breast especially in unmarried girls with minimal side effects. Ultrasonology may be relied upon for follow up measurements since it is more accurate in measuring the dimensions.
Reducing Length of Stay and Hospital Readmission for Orthopedic Patients: A Quality Improvement Project
Authors: Kamau Emma Betty , Foronda Cynthia , Hernandez Victor Hugo , Walters Brian Anthony 
Published: October 2021

BackgroundTransitioning patients from the hospital to home after a total hip or knee arthroplasty is challenging. Severe pain, comorbidities and complex medication regimes have the potential to delay readiness for discharge, increase length of stay (LOS), and cause readmissions.ObjectiveThe goal of this practice improvement project was to improve patient readiness for discharge after total joint arthroplasty to reduce LOS, prevent emergency department (ED) visits, and prevent hospital readmissions.MethodsThis quality improvement project was guided by the Iowa Model and implemented a prepost program implementation evaluation design. Nurses incorporated the Registered Nurse Assessment of Readiness for Hospital Discharge Scale (RN-RHDS) to guide and evaluate discharge education efforts.ResultsThe focused education cohort demonstrated significantly decreased LOS and decreased readmissions compared to the cohort receiving standard education efforts. ED visits were not significantly different amongst cohorts.ConclusionThis practice improvement project demonstrates successful translation of research into practice.Implications for NursingThe use of focused education and the RN-RHDS tool is recommended for nursing to improve patient readiness for discharge and patient outcomes.
The Use of Borehole Imaging Logs to Optimize Horizontal Well Completions in Fractured Water-flooded Carbonate Reservoirs
Authors: Al-Busaidi Rashid 
Published: October 2021

ABSTRACT
Early water breakthrough has occurred in the Lower Cretaceous carbonate reservoirs (Aptian Shu’aiba Formation) in Yibal and Lekhwair fields, north Oman. Borehole Image logs were run in more than 10 horizontal wells in each field to investigate the role of faults and fracture systems, as well as facies variations and sedimentary features. These logs indicated the presence of highly-fractured zones with both open and cemented fractures. The fractures have orientations consistent with fault patterns interpreted from 3-D seismic data. High density fractured zones, in most cases, correspond to faults, some of which are below seismic resolution. The presence of fractures and/or fracture zones is the primary cause of early water breakthrough. Improved production performance was achieved by perforating non-fractured intervals to avoid early high water cuts.
Delineation of Organic Richness and Thermal History of the Lower Cretaceous Thamama Group, East Abu Dhabi: A Modeling Approach for Oil Exploration
Authors: Taher Ahmed A. 
Published: October 2021

ABSTRACT
The source rocks of the Lower Cretaceous Thamama Group in east Abu Dhabi were identified by using wireline logs. This technique was applied to 33 wells which provided a well-sampled new regional pattern of source rock distribution and thickness. The Thamama Group includes rich source rocks in the Aptian Shu’aiba intra-shelf basin facies and a moderate source rock potential in the dense layers, especially those in the basal part of the Nasr Formation. The reconstruction of the burial and thermal histories indicates that the mature Thamama kitchens are mainly located in the eastern part of Abu Dhabi, adjacent to the foredeep basin and reached optimum maturity levels starting in the Eocene. Westward migration from these kitchens is mainly lateral and updip toward the main Thamama producing fields in central Abu Dhabi. The conclusion that the hydrocarbons migrated laterally is supported by oil to source rock correlation and the vertical distribution of hydrocarbons in the reservoirs.
Shuttle Imaging Radar Views of Some Geological Features in the Arabian Peninsula
Authors: Al-Hinai Khattab G. , Dabbagh Abdallah E. , Gardner Weston C. , Khan Muhammad A. , Saner Salih 
Published: October 2021

ABSTRACT
The Space Shuttle Endeavor, carrying Shuttle Imaging Radar (SIR), has imaged selected parts of the Earth during two missions in April and October, 1994. The SIR instrument acquired remote sensing data in L, C and X bands. The main objective of the experiment was to assess the utility of radar images for multiple geologic, hydrologic and environmental applications. The geologic interpretation of the L-band image strips, over the Arabian Peninsula, reveals faults, folds, joints, details of harrats (basalt flows), karst terrain, and drainage systems beneath thin sand cover which are not visible on other remote sensing images (Landsat and SPOT) and are not shown on existing geologic maps.
Sequence Stratigraphic Modeling of the Lower Thamama Group, East Onshore Abu Dhabi, United Arab Emirates
Authors: Aziz Sabah K. , El-Sattar Mohamed M. Abd 
Published: October 2021

ABSTRACT
The Lower Cretaceous (Berriasian to Valanginian) Habshan Formation (Lower Thamama Group) of Abu Dhabi was deposited on a broad carbonate shelf. In east onshore Abu Dhabi, the Habshan Formation consists mainly of limestone and dolomite reaching a thickness of more than 1,100 feet. The depositional environment ranged from shallow-water peritidal to deeper shelf basin. The integration of seismic-stratigraphic, biostratigraphic, lithostratigraphic and electric log data reveals three sequences (I to III) and three shelf edges within the Habshan Formation in east onshore Abu Dhabi. These high energy shelfal sediments prograde toward the basin to the east and northeast with their shelf edges trending north-northwest to south-southeast. The seismic data indicates that the basin was filled in the east during the Hauterivian, after the deposition of Sequence IV (equivalent to the Zakum formation). Good reservoir development is found in the carbonates deposited in the high energy environment along the shelf edge of the Habshan sequence, particularly within the oblique and sigmoidal clinoforms, whereas potential source rocks are expected to be developed basinward. This combination renders the Habshan and Zakum sequences an attractive exploration target, both as structural and stratigraphic traps. Recent exploration activity in the area established the presence of hydrocarbons within the Habshan Sequence III in east onshore Abu Dhabi.
Stratigraphic Trap in the Permian Unayzah Formation, Central Saudi Arabia
Authors: Evans Daniel S. , Bahabri Bassam H. , Al-Otaibi Ahmed M. 
Published: October 2021

ABSTRACT
The recent discovery in Central Saudi Arabia of Arabian Super Light oil in 'Usaylah-1 confirms stratigraphic trap potential of the Permian Unayzah Formation. The trap is an updip pinch-out of an upper Unayzah sandstone along the eastern flank of the north-south trending Hawtah anticline. The seal is the basal shales and siltstones of the Khuff and Unayzah formations and the source rock is the Lower Silurian Qusaiba Shale. The well encountered an oil column of 31 feet in an upper Unayzah eolian dune facies. The areal distribution of the prospect was mapped with a 3-D seismic survey. Seismic horizon slices and relative amplitude maps at the target reflection clearly delineate the trap. The oil-productive Unayzah sandstone is imaged as a high-amplitude reflection in an isolated area of approximately 8 square kilometers. Seismic isochron maps are proving effective in focusing future exploration to areas of similar stratigraphic trap potential in the region.
Geographical Information System in the Exploration Environment
Authors: Abel Roger D. 
Published: October 2021

ABSTRACT
Geographical Information System (GIS) technology has been implemented at Petroleum Development Oman (PDO) within the Exploration Topographic Department, in support of various applications over the previous few years. The primary uses for GIS technology within Exploration are in providing users with simple access to corporate attribute data via a uniform map-based interface, thereby enabling them to carry out data quality control, spatial analysis, and mapping. Initially GIS technology has been implemented with applications linking to the corporate well database, to prospect and lead databases for portfolio management, and to seismic 2-D and 3-D location and interpretation data. Particularly for personnel new to the PDO environment, GIS provides a tool for users to become quickly familiar with the available corporate data and for managers to analyse data in a way not previously possible.
The Challenge of Interpreting 3-D Seismic in Shaybah Field, Saudi Arabia
Authors: Alfara Mohammed N. , Nebrija Edgardo L. , Ferguson Michael D. 
Published: October 2021

ABSTRACT
The giant Shaybah field, situated in the northeastern Rub’ Al-Khali Desert in Saudi Arabia, was discovered in 1968. 2-D seismic and well control were used at the time to delineate the field. A 3-D seismic program was launched in 1993 to develop a detailed geological picture of the field. Over 120 million seismic traces, covering an area of about 1,100 square kilometers, were acquired in flat sabkhas and high sand dunes. The dunes, exceeding 200 meters in height in places, posed a severe statics correction problem. Up to 200 milliseconds of time correction was sometimes applied to the seismic traces in order to compensate for sand-related statics. Also, as verified by vertical seismic profiles, the reservoir level was severely obscured by strong multiples.
In addition to complex topography and multiples, the 3-D structural seismic interpretation had to overcome two further problems. First, the lithology of the gas-capped Shu’aiba reservoir consists predominantly of carbonates which are sealed by a denser, compacted shale. The decrease in density and increase in velocity, at the top of the Shu’aiba reservoir, result in a weak reflection. Second, the top of the Shu’aiba reservoir undulates as a result of rudist build-ups and therefore is not conformable with its base. For these reasons, the top of the Shu’aiba reservoir cannot be mapped as a “phantom” of the much better reflection from the base of the reservoir.
To resolve the uncertainties described above, borehole seismic measurements (specifically offset and zero-offset vertical seismic profiles in vertical wells) were incorporated. These additional measurements provided the required calibration of the seismic, and hence the validation of the structural interpretation. These borehole surveys continue to serve as a reference for on-going efforts to further improve the data quality using more advanced processing techniques.
Production and Geological Implications of the Natih 9C3D Seismic Survey
Authors: Hitchings Victor H. , Potters Hans 
Published: October 2021

ABSTRACTThe Natih Formation in the Natih field is a heterogeneously fractured reservoir being developed by gas/oil gravity drainage. An understanding of the degree and orientation of the fracturing is essential for the optimum development of the reservoir. In order to better understand the fracturing in the reservoir, conventional 3-D (compressional) and limited 9C3D (nine-component, three-dimensional) seismic surveys were made of the Natih field. A revised fault/fracture model was developed from the conventional 3-D survey results in which ‘domains’ of similar fault/fracture character have been defined. Comparison with well-production data indicates that the domains associated with strike-slip or rotational movements (interpreted as being more fractured than adjacent areas) are zones of significantly higher productivity. The 9C3D seismic survey results also show areas or ‘domains’ of variable shear-wave time splitting. A comparison of the fault/fracture domains with the shear-wave time-splitting domains shows a close relationship in which areas of highest shear-wave time splitting coincide with those in which fracturing is most intense. The integration of fault/fracture modeling, well-production characteristics and the 9C3D survey results indicate the potential of the latter as a field-development tool in terms of optimizing well locations, well planning and reservoir management decision making.