bluuebunny/crossref_metadata_2025_split huggingface dataset:
УЏБЕНИЧКО ПИТАЊЕ У ПРОСВЕТНОЈ ПОЛИТИЦИ КРАЉЕВИНЕ ЈУГОСЛАВИЈЕ (1929-1941)
Authors: Кољанин Драгица 
Published: January 2019

На основу архивских истраживања, објављених историјских извора, периодике и релевантне литературе у раду је изанализирано једно од кључних питања спровођења културне политике у Краљевини Југославији: питање издавања јединствених уџбеника. Праћени су и напори Друштва народа да се установи посебна научна дисциплина која ће се бавити проучавањем, упоређивањем и ревизијом уџбеника. После проглашења диктатуре краља Александра 1929. у оквиру унификације економског и културног простора настојало се на државном издању јединствених уџбеника за целу земљу, како је то било дефинисано Законом о уџбеницима за народне, грађанске, учитељске и средње школе 27. септембра 1929. То је изазивало расправе у широј јавности, а посебно у стручној, поготово у вези са расписивањем конкурса за израду уџбеника у јануару и фебруару 1935. Покушаји да се уџбеници унифицирају су остали без успеха и ова политика је практично напуштена 1939. године.
THE SETTLEMENT OF SLOVAKS IN KYSÁČ
Authors: RAMAČ JANKO , MARČOK DANIELA 
Published: January 2019

The first Slovak colonists arrived in some villages of the landed estate of Futog around the middle of the fourth decade of the 18th century. The first Slovak evangelists came to Kysáč in 1773. Our research focuses on the beginning and on the first decades of the arrival of Slovaks to this settlement. The aim of the research is to understand the beginnings and the basic social and economic circumstances at the time of the arrival of Slovaks in Kysáč from the 7th decade of the 18th century to the beginning of the 19th century using authentic data, primarily from František Jesenský’s Chronicle of the Evangelical Church in Kysáč (1773) and the data from the Archive of Vojvodina, which have been rarely used in previous research, as well as the registers from the archives of the Evangelical churches in Báčsky Petrovec and Kysáč and the existing written documents.
Bahan Ajar Gerak Planet dalam Pembelajaran Fisika di Madrasah
Authors: Anjani Riska , Ariandini Silvia , Irawan Irawan 
Published: January 2019

Konsep mengenai orbit bulan dan planet-planet tertentu pertama kali dikemukakan oleh Ptolemeus yang kemudian dikoreksi oleh al-Battani (858-929 M), ia juga berhasil menentukan perkiraan awal bulan baru, dan perkiraan panjang matahari. Al-Battani juga mengembangkan metode untuk menghitung gerakan dan orbit planet-planet, namun temuan tersebut lebih dikenal sebagai temuan Kepler (1571-1630 M).Karya dan temuan ilmuwan muslim banyak, namun guru-guru di madrasah belum banyak yang bisa menyampaikan tentang temuan-temuan ilmuwan muslim yang berkaitan dengan fisika. Guru-guru di madrasah umumnya memberikan pengetahuan tentang fisika sama dengan tingkat SMA yang mengacu pada ilmuwan barat. Tujuan dari penelitian ini untuk mengungkap bahwa karya ilmuwan muslim dapat digunakan sumber belajar IPA di madrasah agar peserta didik di madrasah secara budaya lebih dekat dengan Islam. Investigasi yang digunakan yaitu investigasi kualitatif dengan pendekatan filsafat sains.
An Investigation Into Propagation Behavior of the Steam Chamber During Expanding-Solvent SAGP (ES-SAGP)
Authors: Pang Zhanxi , Wang Lei , Wu Zhengbin , Wang Xue 
Published: January 2019

Summary
Steam-assisted gravity drainage (SAGD) and steam and gas push (SAGP) are used commercially to recover bitumen from oil sands, but for thin heavy-oil reservoirs, the recovery is lower because of larger heat losses through caprock and poorer oil mobility under reservoir conditions. A new enhanced-oil-recovery (EOR) method, expanding-solvent SAGP (ES-SAGP), is introduced to develop thin heavy-oil reservoirs. In ES-SAGP, noncondensate gas and vaporizable solvent are injected with steam into the steam chamber during SAGD. We used a 3D physical simulation scale to research the effectiveness of ES-SAGP and to analyze the propagation mechanisms of the steam chamber during ES-SAGP. Under the same experimental conditions, we conducted a contrast analysis between SAGP and ES-SAGP to study the expanding characteristics of the steam chamber, the sweep efficiency of the steam chamber, and the ultimate oil recovery. The experimental results show that the steam chamber gradually becomes an ellipse shape during SAGP. However, during ES-SAGP, noncondensate gas and a vaporizable solvent gather at the reservoir top to decrease heat losses, and oil viscosity near the condensate layer of the steam chamber is largely decreased by hot steam and by solvent, making the boundary of the steam chamber vertical and gradually a similar, rectangular shape. As in SAGD, during ES-SAGP, the expansion mechanism of the steam chamber can be divided into three stages: the ascent stage, the horizontal-expansion stage, and the descent stage. In the ascent stage, the time needed is shorter during ES-SAGP than during SAGP. However, the other two stages take more time during nitrogen, solvent, and steam injection to enlarge the cross-sectional area of the bottom of the steam chamber. For the conditions in our experiments, when the instantaneous oil/steam ratio is lower than 0.1, the corresponding oil recovery is 51.11%, which is 7.04% higher than in SAGP. Therefore, during ES-SAGP, not only is the volume of the steam chamber sharply enlarged, but the sweep efficiency and the ultimate oil recovery are also remarkably improved.
Improved Wellbore Stability in North Sea Lark and Horda Shales Through Shale/Fluid-Compatibility Optimization
Authors: van Oort Eric , Pasturel Christian , Bryla Jedrzej , Ditlevsen Frederik 
Published: January 2019

Summary
Offshore wells drilled in the central and northern North Sea have historically suffered from borehole-instability problems when intersecting the Upper/Lower Lark and Horda Shale formations using either water-based mud (WBM) or oil-based mud (OBM). A wellbore-stability investigation was performed that focused primarily on improving shale/fluid compatibility. It was augmented by a look-back analysis of historical drilling operations to help identify practical solutions to the borehole-instability problems.
An experimental rock-mechanics and shale/fluid-compatibility investigation was performed featuring X-ray-diffraction (XRD) and cation-exchange-capacity (CEC) characterizations, shale accretion, cuttings dispersion, mud-pressure transmission, and a new type of borehole-collapse test for 10 different mud systems [WBM, OBM, and high-performance WBM (HP-WBM)]. The results of this investigation were then combined with the results of a well look-back study. The integrated study clearly identified the root cause(s) of historical well problems and highlighted practical solutions that were subsequently implemented in the field.
The borehole-instability problems in the Lark and Horda Shales have a characteristic time dependency, with wellbore cavings occurring after 3 to 5 days of openhole time. The problems were not related to mud-weight selection but were instead caused by mud-pressure invasion into the shales, which destabilizes them over time. An experimental testing program revealed that this effect occurs in both WBM and OBM to an equal extent, which explains why nonoptimal field performance has historically been obtained with both types of mud systems. New HP-WBM formulations were identified that improve upon the mud-pressure invasion and borehole-collapse behavior of conventional OBM and WBM systems, yielding extended openhole time that allows the hole sections in the Lark and Horda Shales to be drilled, cased, and cemented without triggering large-scale instability. Look-back analysis also indicated that secondary causes of wellbore instability, such as barite sag, backreaming, and associated drillstring vibrations, should be minimized for optimal drilling performance. A new HP-WBM system, together with improved operational guidelines, was successfully implemented in the field, and the results are reported here.
Downhole Scales Management in Mature Gas Fields
Authors: Ghouri Saad Ali , Ali Imtiaz , Shah Naseem Munawar , Ejaz Muhtashim , Haider Syed Afraz 
Published: January 2019

Abstract
Dealing with mature fields in a period of low oil price, companies have focused their activity on intensive rig-less campaigns aimed at increasing fields’ recovery factors and production. Aging of the fields together with pressure decline and onset of water production has added the complexity of scale deposition in numerous wells. Scale can deposit at any location that is in contact with water, such as in the reservoir, well bore, tubing, top side and processing facilities and cause production decline and flow restriction if not properly controlled. This paper will be dedicated to show the selection of the right subsurface intervention technique and the prevention of scales re-occurrence has been wisely decided based on scale management approach which covers scale prediction and prevention techniques.
Conventionally, scale is controlled by the use of chemical inhibitors either by squeeze treatment into the reservoir or continuous / batch injection into the well. ‘’Prevention is better than cure’’ is the right motto for preventing re-occurrence of scale. Successful experience gained through the application of some new scales inhibition techniques was the key to implementing these preventive methods on different wells in operated and non-operated fields.
Improved Impact-Resisted Cement System Achieves the Side-Track in First Attempt in Complex Open Holes Environment Saving Four Folds of Operations Cost
Authors: Fazal Adnan , Yousuf Arif , Ur Rehman Aziz , Anwar Rameez , Mughal Rafiq Ahmed , Shiekh Rizwan 
Published: January 2019

Abstract
The operation of bypassing the existing borehole by placing a kick off cement plug has historically been very well established and long-standing technique. Although placement of a cement plug appears to be a routine and relatively simple job, the instances of kick off plug not fulfilling the desired purpose are quite frequent requiring same degree of planning as primary cement jobs. Traditional cement slurry systems for sidetracking have been focused on the development of compressive strength by reduced water content. These cements exhibit low resistance to impact and toughness requiring multiple attempts to side track the well. An industry average for kick-off plugs is 2.4 attempts per kick-off, with 24 hours rig time associated with each attempt.
This paper describes the engineered slurry system that incorporates unique properties of higher impact resistance, fracture toughness and load bearing capacity which resulted in slow ROP and sidetrack in 1stattempt. The main conclusion will be supported by case study at the end of paper.
Need for Developing Unitization Regime & Closing Unitization Issues to Optimize the Economics and Reserves of Straddled Reservoirs in Pakistan
Authors: Qadar Sohaib , Khan Muhammad Noman , Rizwan Muhammad 
Published: January 2019

Abstract
The concept of unitization albeit has been in its infancy under the existing upstream exploration & production oil & gas legal regime in Pakistan, even though there are many straddling reservoirs which continue to be in communication. Therefore, the need to develop a comprehensive legal & regulatory framework that covers all aspects of unitization of straddling reservoirs and closing all pending unitization issues is the dire need of the hour. This is not only critical from the Governments' perspective but is important for the companies subject to unitization to effectively monetize their returns on investment. The paper concludes that in the presence of a strong regulatory framework comprehensively addressing unitization of straddling reservoirs, upstream companies would be forced to unitize, either by incentives or by compulsion while the regulator shall continue to supervise their work programs regarding field development. The paper attempts to provide creative guidance for setting up a comprehensive legal/regulatory framework addressing unitization.
Prevalence and associated factors for Pterygium in Han and Mongolian adults: across-sectional study in inner Mongolian, China
Authors: Wang Yuhan , Shan Guangliang , Gan Linyang , Qian Yonggang , Chen Ting , Wang Hailing , Pan Xiaodan , Wang Wenrui , Pan Li , Zhang Xia , Wang Meng , Ma Jin , Zhong Yong 
Published: January 2019

Abstract
Background: To investigate the prevalence of and factors associated with pterygium in Han and Mongolian adults at four survey sites in Inner Mongolia, China.
Methods: A population-based, cross-sectional study was conducted. Using a stratified sampling method, we eventually included 2,651 participants of at least30 years of age from a total of 3,468 eligible residents. Factors associated with pterygium were analysed using univariate analysis and logistic regression models.
Results: There were 1,910 Han adults and 741 Mongolian adults included in this study. The mean± standard deviation of age for individuals in the study cohort was 48.93±11.06 years. The overall prevalence of pterygium was 6.4% (n=169), and the prevalences of bilateral and unilateral pterygium were 1.4% (n=38) and 4.8% (n=128), respectively. The most common grade of pterygium was Grade 2. After univariate analysis, eleven factors were considered in a multivariate analysis. The results indicated that age (P<0.001), education level (P<0.001), outdoor occupation (P=0.026), and time spent in rural areas (P<0.001) were significantly associated with pterygium, whereas gender and ethnicity were not risk factors. In subgroup analysis, BMI≥28 was a protective factor for Han individuals (OR 0.42, 95% CI 0.21-0.81, P=0.01), but a risk factor for Mongolian individuals (OR 2.39, 95% CI 1.02-5.58, P=0.044). The BF% in Han and Mongolian individuals had significant difference (P<0.001).
Conclusions: Our results indicated that an outdoor occupation, old age and time spent in rural areas are risk factors for pterygium in Inner Mongolia. Living near an urban survey site (Hohhot and Tsining District) and having a higher education level are protective factors for pterygium. Ethnicity, gender, smoking, diabetes and high blood pressure are not associated with pterygium. Different dietary structures in Han and Mongolian adults may lead to different fat content of body and therefore contributes to the prevalence of pterygium.
Keywords: Pterygium, prevalence, Han and Mongolian, risk factors, protective factors
Efficacy and safety of thrombolytic therapy for stroke with unknown time of onset: a meta-analysis
Authors: Zhu Ruo-lin , Xu Jing , Xie Cheng-juan , Hu Ying , Wang Kai 
Published: January 2019

Abstract
Background and Purpose: Recombinant tissue plasminogen activator (rt-PA) is one of the most effective therapies available for patients with known-onset stroke (KOS). Whether rt-PA treatment would improve functional outcomes in patients with stroke with unknown time of onset (UTOS) is undetermined. We aimed to systematically assess the efficacy and safety of thrombolysis for UTOS patients in this meta-analysis.
Methods: A systematic literature search of Medline, Embase and Cochrane Library was conducted. We considered the relevant data comparing thrombolyzed UTOS patients vs. non-thrombolyzed UTOS patients or thrombolyzed UTOS patients vs. thrombolyzed KOS patients. Treatment efficacy and safety were measured according to modified Rankin Scale scores of 0-2 (mRS 0-2), and the presence of spontaneous intracerebral hemorrhage (SICH) or mortality at 90 days respectively.
Results: A total of 12 studies with 3,084 patients from both clinical trial and database registries meeting the inclusion criteria were included in the meta-analysis. All the patients had an ischemic lesion that was assessed by imaging including computed tomography (CT) or magnetic resonance imaging (MRI). Among these studies, 7 compared the thrombolytic efficacy in thrombolyzed UTOS patients with that in non-thrombolyzed UTOS patients (mRS 0-2: odds ratio (OR)=1.65, 95% CI 1.19-2.27, P= 0.002), and 8 studies compared thrombolyzed UTOS patients with thrombolyzed KOS patients (mRS 0-2: OR=0.87, 95% CI 0.66-1.15, P=0.26). The incidence of SICH was higher in thrombolyzed UTOS patients than in non-thrombolyzed UTOS patients (OR 3.07, 95% CI 1.12-8.43, P=0.03), but there was no difference between thrombolyzed UTOS patients and thrombolyzed KOS patients (OR=1.10, 95% CI 0.55-2.22, P=0.79) at 90 days. Mortality was not different between thrombolyzed UTOS patients and non-thrombolyzed UTOS patients (OR=1.14, 95% CI 0.46-2.83, P=0.77) or between thrombolyzed UTOS patients and thrombolyzed KOS patients (OR=0.68, 95% CI 0.40-1.16, P=0.15).
Conclusions: Compared with non-thrombolyzed patients, imaging-guided thrombolysis for UTOS patients had significantly favorable outcomes and more intracranial hemorrhage at 90 days.
Keywords: Efficacy, safety, thrombolysis, unclear-onset stroke, meta-analysis
Yield and the 15N Fate in Rice/Maize Season in the Yangtze River Basin
Authors: Wang Sen , Yang Min , Liao Shipeng , Sheng Weihong , Shi Xiaojun , Lu Jianwei , Guo Shiwei , Shen Jianbo , Zhang Fusuo , Goulding Keith , Liu Xuejun 
Published: January 2019

Core Ideas

Yield and 15N fate were studied in rice/maize season in Yangtze River Basin.
Rice/maize yields were comparable between traditional and reduced fertilizer rate.
Reduced fertilizer increased N use efficiency and reduced N loss to environment.
Reduced fertilizer showed 40% N and 50% P saving potential in the rice/maize season.
The deterioration of water quality induced by overuse of N and P fertilizers has become one of the main limiting factors of the sustainable economic and social development of the Yangtze River Basin (YRB), China. Three field experiments using 15N‐labeled urea were conducted at three locations in upstream, midstream, and downstream regions of YRB to evaluate the impacts of improved fertilizer management (reduced rates and better timing of the applications compared to a traditional, high N application) on crop yield, fertilizer N recovery, and fate in a rice (Oryza sativa L.)‐flooded fallow rotation (RF), a rice–wheat (Triticum aestivum L.) rotation (RW), a rice‐flooded fallow rotation (RF), a rice–vegetable rotation (RV), and a maize (Zea mays L.) –wheat rotation (MW). The improved fertilizer treatment significantly increased rice grain yield by 12.9% compared with the high fertilizer treatment in a RW rotation in Rugao (Jiangsu), but had no significant effect on rice grain yield in the other rotations. It led to significantly lower maize yields in Jiangjin (Chongqing). The total fertilizer N recoveries in rice and in the 0 to 40 cm soil were 17 to 35% and 17 to 32%, with crop and/or soil recoveries usually higher in the improved fertilizer treatments than in the traditional fertilizer treatments, but not for maize. Fertilizer N losses can be reduced by using improved fertilizer management in a rice‐based rotation. An improved fertilizer management which has 60% N and 50% P application of the traditional fertilizer application can produce a sustained high rice yield and reduce the environmental impact compared with traditional fertilizer input used in the YRB.
Turbidity control on dissolved air flotation process using fuzzy logic
Authors: Fonseca Rodolpho Rodrigues , Franco Ivan Carlos , Thompson José Pedro , da Silva Flavio Vasconcelos 
Published: January 2019

Abstract
This study intends to explore fuzzy logic control on clean water turbidity process with dissolved air flotation (DAF). Three different strategies were tested to regulate clean water turbidity by manipulating the saturator vessel flow output aiming for low actuators control effort. Saturator pressure was the manipulated variable (MV) in the first control loop named SISO I. The second control loop, SISO II, used recycle stream valve opening as MV. The third control loop (MISO) was developed applying fuzzy logic instead PID control. Several performance criteria were used to analyze the process control performance such as integral absolute error (IAE), recycle stream valve and saturator vessel pressure regulating valve control efforts, ECV01 and ECV02 respectively. Results from SISO I and SISO II strategies showed that recycle stream is a better MV than saturator vessel pressure for clean water turbidity control in the DAF process. Only SISO II and MISO strategies proved to be capable of regulating the process variable. However, MISO control showed better performance based on IAE value against SISO II, with a reduction of 11.24% on its value, even the recycle stream valve control effort for MISO control being fairly higher than that for SISO II. Nevertheless, fuzzy logic control application gave rise to better turbidity control, and consequently prevented the excessive use of clean water in the recycling stream.
Membrane distillation of saline and oily water using nearly superhydrophobic PVDF membrane incorporated with SiO2 nanoparticles
Authors: Hamzah N. , Nagarajah M. , Leo C. P. 
Published: January 2019

Abstract
Fat, oil and grease in wastewater generated from household kitchens, restaurants and food processing plants affect sewer systems, water resources and environment adversely. Hence, membrane distillation of saline and oily water was studied using a nearly superhydrophobic membrane developed in this work. Polyvinylidene fluoride (PVDF) membrane incorporated SiO2 nanoparticles was synthesized via phase inversion with dual baths and modified using hexadecyltrimethoxy silane. The volume ratio of silane to ethanol was varied between 1:200 to 1:25. The membrane characteristics were examined using a goniometer, a porometer, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The PVDF-SiO2 membrane modified using the volume ratio of 1:50 achieved the highest water contact angle of 141.6° and LEP of 2.642 bar. This membrane was further tested in membrane distillation to observe the permeate flux of distilled water, saline solution (1 M NaCl) as well as saline and oily solution (1 M NaCl; 1,000 ppm of palm oil). The modified PVDF/SiO2 showed high permeate flux which is nearly four times of the permeate flux of neat PVDF membrane, but still susceptible of salt and oil fouling as shown in SEM images.
In Vitro Inhibition of Staphylococcus aureus subsp. aureus (ATCC® 6538™) by Artemether-Lumefantrine Tablets: A Comparative Study of Three Dosage Strengths
Authors: Solomon Opoku , Isaac Nyanor 
Published: January 2019

Purpose:
Antibiotics are progressively failing in the fight against infections due to S. aureus because the bacterium has an outstanding ability to acquire multi-antibiotic resistance and become resistant to most antibiotics. Multi-drug resistant S. aureus poses a major threat to the foundation upon which standard antibacterial chemotherapy stands, hence the need to consider non-antibiotic solutions to manage invasive bacterial infections. This study investigated the inhibitory activities of three dosage strengths of artemether-lumefantrine tablets against Staphylococcus aureus subsp. aureus (ATCC® 6538™) and determined the minimum concentrations of the tablets that are able to completely inhibit growth of the bacterium in vitro.

Methods:
The agar dilution and broth macrodilution techniques were used to determine the susceptibility of the Staphylococcus aureus subsp. aureus (ATCC® 6538™) strain to artemether-lumefantrine 20/120mg, 40/240mg and 80/480mg tablets.

Results:
The most active inhibitor was artemether-lumefantrine 80/480mg tablet with a minimum inhibitory concentration value of 2.5mg/mL while artemether-lumefantrine 20/120mg and 40/240mg tablets exhibited moderate but equal activities against the test strain.

Conclusions:
The study has revealed that artemether-lumefantrine, an antimalarial drug, also has anti-staphylococcal properties and inhibits S. aureus in vitro. This study presents the first report on the in vitro activity of artemether-lumefantrine tablet against S. aureus and suggests the need to consider it as an alternative in the treatment of staphylococcus infections.