bluuebunny/crossref_metadata_2025_split huggingface dataset:
PEMBELAJARAN BERBASIS DIGITAL: STUDI PENGGUNAAN GEOGEBRA BERBANTUAN E-LEARNING UNTUK MENINGKATKAN HASIL BELAJAR MATEMATIKA
Authors: Sudihartinih Eyus , Wahyudin Wahyudin 
Published: July 2019

Abstrak Penelitian ini menggambarkan pembelajaran berbasis digital, yaitu penggunaan Geogebra berbantuan e-learning, untuk meningkatkan hasil belajar mahasiswa pada konsep bidang dan garis dalam ruang. Penelitian ini adalah pre-experimental dengan jenis one-shot case study dengan partisipan mahasiswa calon dosen matematika pada semester II yang terdiri dari 14 orang laki-laki dan 30 orang perempuan dari salah satu universitas di Indonesia. Hasil penelitian menunjukkan penggunaan Geogebra berbantuan e-learning efektif untuk meningkatkan hasil belajar mahasiswa pada konsep bidang dan garis dalam ruang. Hal ini terlihat dari sebagian besar mahasiswa memperoleh hasil belajar yang maksimal, dan hanya sebagian kecil mahasiswa yang hasil belajarnya masih minimal. Penelitian ini merekomendasikan penggunaan Geogebra dan e-learning pada pembelajaran konsep geometri lainnya.
AbstractThis study describes digital-based learning, namely the use of Geogebra assisted by e-learning, to improve student learning outcomes in the concepts of fields and lines in space. This study was pre-experimental with a type of one-shot case study with participants of mathematics teacher candidates in the second semester consisting of 14 men and 30 women from one university in Indonesia. The results showed that the use of Geogebra assisted by e-learning was effective in improving student learning outcomes in the concepts of fields and lines in space. This can be seen from the majority of students obtaining maximum learning outcomes, and only a small percentage of students whose learning outcomes are still minimal. This study recommends the use of Geogebra and e-learning in learning other geometry concepts.
ANALYSIS ON VENTILATION SYSTEM IN HOLES C1 UNDERGROUND MINES OF PT. NUSA ALAM LESTARI, DESA SALAK, KECAMATAN TALAWI, SAWAHLUNTO, WEST SUMATERA
Authors: Nata Refky Adi , Nanda Heru Firma 
Published: July 2019

PT. Nusa Alam Lestari merupakan perusahaan tambang yang beroperasi pada tambang bawah tanah. Berdasarkan hasil pengamatan di lapangan, perusahaan hanya melakukan perencanaan penambangan belum mempunyai perencanaan ventilasi. Penelitian ini menganalisis sistem ventilasi aktual di lubang C1, menganalisis kualitas udara dan gas pada lubang C1 berdasarkan KepMen No. 555.K/26/M.PE/1995, dan memodelkan sistem ventilasi yang baik untuk lubang C1 menggunakan simulasi perangkat lunak Ventsim visual 5.2. Hasil penelitian menyimpulkan belum optimalnya kinerja blower utama yang di pasang pada mulut tambang dalam mengalirkan udara bersih kedalam tambang yang disebabkan oleh rendahnya kapasitas hembus yang hanya 10.4 m/s dan panjangnya jalur udara pada sistem ventilasi aktual. Kualitas udara dan gas tambang pada lubang C1 cukup baik, sedangkan untuk temperatur rata-rata tiap front penambangan memiliki temperatur 30o yang melewati ambang batas yang ditetapkan yaitu antara 18-24oC dan kelembaban rata-rata tiap front penambangan memiliki kelembaban 70%, hal ini masih dibawah nilai ambang batas yang ditetapkan yaitu <85%. Setelah melakukan model sistem ventilasi untuk lubang C1, perencanaan menggunakan software Ventsim visual dengan bentuk gambaran ventilasi yang akan digunakan pada lubang C1 tambang bawah tanah PT. Nusa Alam Lestari. Dengan mengalirkan udara segar menggunakan blower dengan kapasitas 12.6 m3/s dan tiga blower bantu kapasitas 5.8 m3/s. Kata-kata kunci: ventilasi, blower, Ventsim visual
Analysis of Boundary-Dominated Gas Well Production Data
Authors: Mohammed Shaibu , Anumah Prosper , Sarkodie-Kyeremeh Justice , Morgan Anthony , Acheaw Emmanuel 
Published: July 2019

Abstract
Arps’ hyperbolic model has historically been used to analyze and forecast gas well performance. This is largely due to its simplicity and explicit nature. Unfortunately, because of the variations of viscosity-compressibility product with average reservoir pressure during boundary-dominated flow (BDF) period, the Arps’ hyperbolic model overestimates gas reserves and future rates. Consequently, existing rate-decline models rely heavily on pseudotime. Unfortunately, pseudotime requires iteration, which is time-consuming.
This paper proposes an empirical rate-decline model for a gas well producing at a constant pressure during BDF. The proposed model utilizes a drawdown correlating parameter that accounts for formation and water compressibilities, as well as the variations of gas properties with pressure. Due to its explicit nature, the proposed rate-decline model can be used to forecast future gas well performance. An explicit model for estimating the decline exponent for a gas well is also proposed. In addition, this paper presents a semi-empirical flowing material balance (SE-FMB) method that allows the estimation of initial gas-in-place, real gas productivity index and estimated ultimate recovery. The advantages of the proposed SE-FMB over the existing methods are two-folds: first, it is iterationless; and second, it avoids the use of a functional relation (or curve fitting) of viscosity-compressibility product and pressure.
The results of this study suggest that the decline exponent for a gas well is time-independent at early-time BDF period and time-dependent at late-time BDF period. At very late-time BDF period, the decline exponent tends to zero. Thus, gas well production data exhibit a hyperbolic decline at early-time BDF period and a transition period at late-time BDF period. At very late-time BDF period, an exponential decline is expected. While the exponential-decline period is not observed in practice due to economic-rate constraints, the hyperbolic-decline period is observed in practice. The transition period may or may not be observed in practice depending on the magnitude of the drawdown parameter and the economic-rate constraints. Comparison of the models results indicates that the proposed rate-decline and the classical Arps’ hyperbolic models are consistent with the rate history during the hyperbolic-decline period; however, the proposed rate-decline model out-performs the classical Arps’ hyperbolic model when the transition period prevails. The results of this study also indicate that ignoring the formation and water compressibilities lead to an overestimation of gas reserves even for a normally-pressured gas reservoir. Simulated and field data have been used to demonstrate the validity and applicability of the proposed model and analysis method.
A Non-Resistivity Approach for Estimating Water Saturation A Case Study in Niger-Delta, Nigeria
Authors: Awuyo Olabode , Sunday Abel , Fadairo Adesina 
Published: July 2019

Abstract
The notion of Water Saturation is of importance in determining the hydrocarbon saturation (1-Sw) in reservoirs, calculating hydrocarbon in place, hence a vital evidence of reliable formation evaluation. Preconceptions in reserves quantification and hydrocarbon in place estimations arise once the outcome of the water saturation value is erroneous. Several models in the literature have been used for estimating water saturation and oftentimes the variance in confidence level of their results lead to substantial variance in original hydrocarbon in place volumes. Obtaining a better resolution with deeper understanding of the gaps observed in the existing approaches for estimating water saturation (Sw) values have been a major challenge in accurate calculation of hydrocarbon in place.
This paper presents a non-resistivity approach for estimating water saturation using Leverett J-function and Reservoir Quality Index with dependency on fluid and facies Values. The innovative approach involves the use of Saturation Height Modelling through Leverett J- function, build facies through Magnetic Resonance Graphical-Based clustering (MRGC) option, use of Regression method and making a simple scripting using logging language (LOGLAN) program in Geolog to achieve the purpose. This current approach has been applied to Niger-Delta alternate shale-sand formation in optimisation of somewhat low recovery of the hydrocarbon reserves due to probably erroneous over estimation of Water Saturation value from Resistivity-based approach. Reliable results from current non-resistivity approach were obtained with average Water Saturation value of 25% as compared to resistivity approach presented by Juhasz with average water saturation value of 32% and non-resistivity approach presented by Brooks-Corey with average water saturation value of 26% and Leverett J- function with average water saturation values of 27% respectively.
Legal and Policy Requirements of Basic Health Insurance Package to Achieve Universal Health Coverage in a developing country
Authors: Hayati Ramin , Kavosi Zahra , Bastani Peivand , Kabir Mohammad Javad , Sobhani Ghasem , nasab Hamide Javadi 
Published: July 2019

Abstract
Objectives: This study has analyzed the policy-making requirements related to basic health insurance package at the national level with a systematic view.
Results: All the documents presented since the enactment of universal health insurance in Iran from 1994 to 2017 were included applying Scott method for assuring meaningfulness, authenticity, credibility and representativeness. Then, content analysis was conducted applying MAXQDA10. The legal and policy requirements related to basic health insurance package were summarized into 3 main themes and 11 subthemes. The main themes include three kinds of requirements at three level of Third party insurer, Health care provider and Citizen/population that contains 5 (financing insurance package, organizational structure, tariffing and purchasing the benefit packages and integration of policies and precedents), 4 (determining the necessities, provision of services, rules relating to implementation and covered services) and 2 (expanded coverage of population and insurance premiums) sub themes respectively. According to the results, Iranian policy makers should notice three axes of third party insurers, health providers and population of the country to prepare an appropriate basic benefit package based on local needs for all the people that can access with no financial barriers in order to be sure of achieving UHC.
Assessment of weight and height of patients with primary immunodeficiency disorders and group of children with recurrent respiratory tract infections.
Authors: Pieniawska-Śmiech Karolina , Bar Kamil , Babicki Mateusz , Śmiech Karol , Lewandowicz-Uszyńska Aleksandra 
Published: July 2019

Abstract
Background

Primary immunodeficiences (PIDs) are a group of chronic, serious disorders in which the immune response is insufficient. In consequence, it leads to an increased susceptibility to infections. Up to date, there are about 300 different disorders classified in that group. There are also patients suffering from recurrent respiratory tract infections (RRTI), however that group doesn't present any abnormalities in terms of conducted immunological tests. Many factors, including medical, can have an impact on physical development of a child. Data such as birth weight and length, also weight, height, BMI during admission to the hospital were collected from 207 patients' medical histories from their hospitalization at Clinical Immunology and Paediatrics ward of J.Gromkowski Hospital in Wrocław. Investigated groups included patients with PIDs, RRTI and a control group of healthy children. Our purpose was to evaluate the physical growth of children with primary immunodeficiency (PID) and children with recurrent respiratory tract infections (RRTI) by assessment of their height and weight. All of parameters were evaluated using centile charts suitable best for the Polish population.

Results

The lowest mean birth weight and height was found among the PIDs patients group. Children with PIDs during hospitalization had statistically relevant lower mean weight than the control group and almost 20% of them had their height situated below 3rd percentile. No statistically relevant differences have been found between them and RRTI group. The statistically significant difference was between the nutritional status of PID patients and the control group.

Conclusions

There is a higher percentage of PID patients with physical growth abnormalities in comparison to healthy children. Our findings indicate a need for further investigation of immune system irregularities and their influence on physical growth of children.
Protocol for cryo-focused ion beam lift-out technique
Authors: Schaffer Miroslava , Pfeffer Stefan , Mahamid Julia , Kleindiek Stephan , Laugks Tim , Albert Sahradha , Engel Benjamin D. , Rummel Andreas , Smith Andrew , Baumeister Wolfgang , Plitzko Juergen M. 
Published: July 2019

Abstract
Cryo-focused ion beam milling of frozen hydrated cells for the production of thin lamellas in combination with cryo-electron tomography (cryo-ET) has yielded unprecedented insights into the cell interior. This method allows access to native structures deep inside cells, enabling structural studies of macromolecules in situ. However, it is only suitable for cells that can be vitrified by plunge freezing (<10 μm). Multicellular organisms and tissues are considerably thicker and high-pressure freezing is required to ensure optimal preservation. Here, we describe a preparation method for extracting lamellas from high pressure frozen samples with a new cryo-gripper tool. This in situ lift-out technique at cryo-temperatures enables cryo-ET to be performed on multicellular organisms and tissue, extending the range of applications for in situ structural biology.
Effect of neck extension on the advancement of tracheal tubes from the nasal cavity to the oropharynx in nasotracheal intubation: a randomized controlled trial
Authors: Kim Hyerim , Lee Jung-Man , Lee Jiwon , Hwang Jin-Young , Chang Jee-Eun , No Hyun-Joung , Won Dongwook , Row Hyung Sang , Min Seong-Won 
Published: July 2019

Abstract
Background

Clinicians sometimes encounter resistance in advancing a tracheal tube, which is inserted via a nostril, from the nasal cavity into the oropharynx during nasotracheal intubation. The purpose of this study was to investigate the effect of neck extension on advancement of tracheal tubes from the nasal cavity into the oropharynx during nasotracheal intubation.

Methods

Patients were randomized to the ‘neck extension group (E group)’ or ‘neutral position group (N group)’ for this randomized controlled trial. After induction of anesthesia, a nasal RAE tube was inserted via a nostril. For the E group, an anesthesiologist advanced the tube from the nasal cavity into the oropharynx with the patient’s neck extended. For the N group, an anesthesiologist advanced the tube without neck extension. If the tube was successfully advanced into the oropharynx within two attempts by the same maneuver according to the assigned group, the case was defined as to ‘success.’ We compared the success rate of tube advancement between the two groups.

Results

Thirty-two patients in the E group and 33 in the N group completed the trial. The success rate of tube passage during the first two attempts was significantly higher in the E group than in the N group (93.8% vs. 60.6%; odds ratio = 9.75, 95% CI = [1.98, 47.94], p = 0.002).

Conclusion

Neck extension during tube advancement from the nasal cavity to the oropharynx before laryngoscopy could be helpful in nasotracheal intubation.
3D printed guiding device assisted bilateral crossing cervical microendoscopic laminoplasty for cervical spondylotic myelopathy: a study protocol for a randomized controlled trial
Authors: Zhang Chunlin , Feng Yang , Yan Xu , Yang Tengyue , Shao Chenglong , Shang Lijie , Liu Yang , Wu Yanyu , Zhao Xiao 
Published: July 2019

Abstract
Background

Cervical microendoscopic laminoplasty (CMEL) is an important surgical method for the treatment of cervical spondylotic myelopathy (CSM). It has the advantages of minimal incision and quick recovery, meanwhile, it also has disadvantages, such as its tedious to install the implants and long operative time. This study proposes a new method of 3D printed guiding device assisted bilateral crossing cervical microendoscopic laminoplasty for CSM, which can further improve the accuracy and efficiency of surgery and shorten the operative time.

Methods/design

Patients who met the surgical criteria will be randomly divided into experimental group and control group. The experimental group will be treated with 3D printed guiding device assisted bilateral crossing cervical microendoscopic laminoplasty. The control group was treated with CMEL. The primary outcomes will be incision length, operative time, intraoperative blood loss and adverse events. The secondary outcomes will be the Japanese Orthopedic Association (JOA) score, the visual analogue scales (VAS) for neck and shoulder pain, cervical curvature index (CCI), range of motion (ROM), the sagittal diameter of the spinal canal, and the healing of the grooves. These parameters will be evaluated preoperatively, intraoperatively, 1 week postoperatively, as well as 3, 6, 12, 24 months postoperatively.

Discussion

This study was the first randomized controlled trial to compare 3D printed guiding device assisted bilateral crossing cervical microendoscopic laminoplasty with CMEL. The results of this study may facilitate the development of surgical treatment of cervical spondylotic myelopathy.
A randomised controlled trial exploring the impact of a dedicated Health and Social Care Professionals team in the Emergency Department on the quality, safety, clinical and cost-effectiveness of care for older adults: Study Protocol
Authors: Cassarino Marica , Robinson Katie , O’Shaughnessy Íde , Smalle Eimear , White Stephan , Devlin Collette , Quinn Rosie , Trépel Dominic , Boland Fiona , Ward Marie E. , McNamara Rosa , O’Connor Margaret , McCarthy Gerard , Ryan Damien , Galvin Rose 
Published: July 2019

Abstract
Background

Older people are frequent Emergency Department (ED) users who present with complex issues that are linked to poorer health outcomes post-index visit, often have increased ED length of stay and tend to have raised healthcare costs. Encouraging evidence suggests that ED teams involving health and social care professionals (HSCPs) can contribute to enhanced patient flow and improved patient experience by improving care decision-making and thus promoting timely and effective care. However, the evidence supporting the impact of HSCPs teams assessing and intervening with older adults in the ED is limited and identifies important methodological limitations, highlighting the need for more robust and comprehensive investigations of this model of care. This study aims to evaluate the impact of a dedicated ED-based HSCP team on the quality, safety, clinical and cost-effectiveness of care of older adults when compared to usual care.

Methods

The study is a single-site randomised controlled trial whereby patients aged ≥65 years who present to the ED of a large Irish hospital will be randomised to the experimental group (ED-based HSCP assessment and intervention) or the control group (usual ED care). The recruitment target is 320 participants. The HSCP team will provide a comprehensive functional assessment as well as interventions to promote a safe discharge for the patient. The primary outcomes include ED length of stay (from arrival to discharge) and incidence of inpatient admissions from the ED. Secondary outcomes include: ED re-visits, unplanned hospital admissions and healthcare utilisation at 30-days and six-month follow-up; patient functional status and quality of life (at baseline and follow-up); patient satisfaction; costs-effectiveness in terms of costs associated with ED-based HSCP compared to usual care; and perceptions on implementation by ED staff members.

Discussion

This is the first randomised controlled trial testing the impact of HSCPs working in teams in the ED on the quality, safety, clinical and cost-effectiveness of care for older patients. The findings of the study will provide important information on the effectiveness of this model of care for future implementation.
The Expression of P16 and S100 Associated with Elastin Degradation and Fibrosis of the Ligamentum Flavum Hypertrophy
Authors: hu Wei , Kan Shunli , Liu Guang , Cao Zegang , Zhu Rusen 
Published: July 2019

Abstract
Background: One of the characteristics of lumbar spinal stenosis (LSS) is elastin degradation and ﬁbrosis in the ligamentum ﬂavum (LF). P16 and S100 participate in scar formation and collagen development in wound healing and ﬁbrosis diseases. In this study, we investigate the association between P16 and S100 expression and the ﬁbrosis of the hypertrophic LF in LSS.

Methods: The LF specimens were surgically obtained from thirty patients with single-segment LSS (SLSS) and 30 patients with double-segment LSS (DLSS). 30 patients with L4/5 lumbar disc herniation were included as control. The LF thickness was measured by axial T1-weighted Magnetic Resonance Imaging(MRI). The extent of LF elastin degradation and fibrosis were graded based on hematoxylin-eosin (H&E) and Verhoff’s Van Gieson’s (VVG) stain, respectively. The localization of P16 and S100 within the LF tissue was determined by immunohistochemistry. Linear correlation tests between LF thickness, fibrosis, P16 and S100 expression was analyzed.

Results: The Absolute and relative LF thickness were greater in the DLSS group compared with the SLSS and LDH groups (p < 0.05). The mean thickness in the DLSS group was 5.658mm (RT = 43.107), compared with 4.924 mm (RT=36.520) and 2.886 mm (RT=21.330), respectively in the SLSS and LDH groups. The amount of collagen deposition is significantly higher in the DLSS group compared with the SLSS and LDH groups (p < 0.05) as shown by the H&E staining. A higher level of elastic tissue was also seen in the DLSS group compared with the SLSS and LDH groups (p < 0.05) though VVG staining. There was a significant correlation between H&E mean rating and relative LF thickness in the DLSS group (r = 0.562; p = 0.010). The specimens in the DLSS group showed positive staining of P16. All the three groups were stained with S100 in the dorsal layer of the LF.

Conclusions: Elastin degradation and fibrosis of the LF in the DLSS patients is more severe compared with the SLSS and LDH patients. The expression of P16 may related to LF hypertrophy in the patients who suffer with LSS. LF hypertrophy process may not be associated with S100.