bluuebunny/crossref_metadata_2025_split huggingface dataset:
School Adjustment, Locus of Control and Achievement Motivation as Predictor of Test Anxiety
Authors: Stella Ogbogo , Amaechi-Udogu Vivian 
Published: October 2019

The study investigated school adjustment, locus of control and achievement motivation as predictor of test anxiety amongst secondary school students in obio-Akpor LGA in Rivers State Nigeria. Five research questions and four null hypotheses were formulated to guide the study Multiple prediction design within the correlational research design was employed for the study, the population of the study was 10,705 junior secondary school students (JSS1) in 14 schools in Obio-Akpor Local Government Area 0f Rivers state. Stratified sampling technique based on gender was used to obtain the sample size of 388 (male 190 and female 198). Four valid instruments titled; Test Anxiety Questionnaire (TAQ), Locus of Control Questionnaire (LOCQ), School Adjustment Questionnaire (SAQ) and Achievement Motivation Questionnaire (AMQ) were used for the study. The reliability and construct validity of these instruments were estimated using the internal consistency method of Cronbach alpha. For Test Anxiety Questionnaire, Cronbach Alpha reliability coefficient was .846, for Locus of Control Questionnaire it was .618, for Achievement Motivation Questionnaire, it was .545 and for School Adjustment it was .611. Research question 1, was answered using descriptive statistics of mean and standard deviation, while 2, 3, 4 and 5 were answered using simple and multiple regression. At 0.05 level of significance, ANOVA associated with multiple regression and t-test associated with simple regression was used for testing the null hypothesis. The result revealed that test anxiety of secondary school students was high, school adjustment and achievement motivation predict test anxiety significantly with locus of control predicting test anxiety but not significantly. Jointly, school adjustment, locus of control and achievement motivation predicted test anxiety significantly. Based on findings recommendations were made.
Educar en contextos interculturales e indígenas en el siglo XXI
Authors: Mansilla Sepúlveda Juan 
Published: October 2019

La revista Historia de la Educación Latinoamericanaque usted tiene en sus manos corresponde a la edición número treinta y tres. En esta oportunidad se invitó a investigadores e investigadoras a presentar artículos vinculados con la educación indígena e intercultural en América Latina. En este contexto, las Naciones Unidas declararon 2019 “Año Internacional de las Lenguas indígenas”, con el fin de sensibilizar a la sociedad en general, no sólo para beneficiar a las personas que hablan estas lenguas, sino también para que otros aprecien la importante contribución que hacen a la rica diversidad cultural de nuestro mundo.
Este número se encuentra dividido en dos partes. La primera presenta artículos referentes a la educación en contextos indígenas e interculturales en diferentes espacios de nuestra América Latina. Son trabajos de investigadores e investigadoras de Colombia, Chile, México, Brasil, Perú y Guatemala. La segunda parte, está dedicada a reseñas de libros y publicaciones seriadas; su lectura permite explorar futuras investigaciones por parte de los interesados en la educación intercultural e indígena en América Latina.
Respecto al contenido de los artículos, se han priorizado aquellos que han tematizado y estudiado a los pueblos originarios de América Latina, indígena y afrodescendientes. Cada resumen se presenta en castellano, inglés, portugués y mapunzugun. Este último, el idioma del pueblo nación-mapuche. El pueblo mapuche fue el único grupo indígena que pactó su autonomía con la corona española en 1641 en las denominadas “Paces de Quilín”, condición que perdió en 1881, momento en que el estado de Chile ocupó sus tierras, obligándolos a una integración forzosa al ideario nacional de los grupos oligárquicos. Desde ese momento la escuela se constituyó en uno de los más poderosos dispositivos de control y agenciamiento para chilenizar al pueblo mapuche a través de una educación monocultural, castellanizadora y hegemónica. Pese a toda esta violencia del colonialismo republicano chileno, el mapunzugunsobrevivió, y su escritura en este número es una evidencia.
A terceira margem da Odisseia
Authors: Sebastiani Breno Battistin 
Published: October 2019

O artigo visa apresentar um modo de interpretação da personagem central da Odisseia por via de uma teoria da recepção focada no papel cocriador do recebedor. Está dividido em quatro partes: após a apresentação do problema, a segunda parte examina os passos-chave do poema (sobretudo dos cantos 9, 11 e 19) que embasam a argumentação da terceira, na qual são discutidos eventuais significados das ausências ou negações enformadas por Odisseu. A seção final argumenta pela possibilidade de leitura da Odisseia como um modo de ficção que não se perfaz nem como máscara nem como duplicidade, mas como alteridade radical em relação ao real.
Physical and Sensory Quality of Broiler Meat as Influenced by Dietary Supplementation of Turmeric (Curcuma longa), Garlic (Allium sativum) and in Combinations as a Feed Additive
Authors: Purwanti Sri , Zuprizal Zuprizal , Yuwanta Tri , Supadmo Supadmo 
Published: October 2019

This research was conducted to evaluate the effect of turmeric water extract, garlic and combinations of turmeric and garlic as feed additives in broiler diets on the physical and sensory quality of broiler meat. During the study, the chicken were given 5 feeding treatments, i.e. R0 (basal ration without phytobiotic and antibiotics) , R1 (basal diet + 0.015% zinc bacitracin + 2.485% filler), R2 (basal ration + 2.50% TE), R4 (basal ration + 2.00% GE + 0.50% filler), and R5 (basal ration + 2.50% TGE). The base diet was composed of: yellow corn, meat and bone meal, poultry meat meal, soybean meal, oil, mineral mix, calcium carbonate, dicalcium phosphate, salt, L-lysine-HCl, and DL-methionine. Variables observed were physical quality (pH, water holding capacity, cooking lose, and tenderness) and sensory quality. Data regarding physical quality were statistically analyzed by one-way ANOVA followed by the orthogonal contrast for significant results, and data of sensory quality by non-parametric methods such as the Hedonic Kruskal-Wallis test. The results showed that the physical quality of meat had no effect (P>0.05), except the significant water holding capacity (P<0.05) which was lower with phytobiotic extract supplementation. All sensory test parameters in fresh and cooked meat had no effect (P>0.05) following phytobiotic extract supplementation, except for the color and acceptability (P <0.05) in fresh broiler meat. The conclusion of the research was that 2.5% TE, 2.0% GE and 2.5% TGE is capable of acting as a feed additive to increase the physical and sensory quality of broiler meat.
Prevalence and Factor Associated with Severity of Dysmenorrhea Among Female Adolescent in Surakarta
Authors: Wrisnijati Dita , Wiboworini Budiyanti , Sugiarto Sugiarto 
Published: October 2019

ABSTRACT
Dysmenorrhea is the most common health problem among female adolescent in Indonesia. Generally, dysmenorrhea decreases the quality of life due to negatively impact on every aspects. This study aim to investigate the prevalence and associated factors with severity of dysmenorrhea among female adolescent aged 15-17 years in Surakarta. This cross-sectional study design conducted among 274 female adolescent aged 15-17 years in State Senior High School 7 Surakarta. The samples selected by stratified random sampling technique. Data were analyzed using chi-square and binary logistic regression test. The results of this study showed the prevalence of dysmenorrhea among female adolescent aged 15-17 years was 89.8%. Several factors such as age of menarche (p<0.001; OR=0.08; 95% CI: 0.03-0.18), menstrual duration (p<0.001; OR=7.54; 95% CI: 3.37-16.86), pain onset (p=0.004; OR=3.34; 95% CI: 1.48-7.51), and pain duration (p<0.001; OR=3.96; 95% CI: 2.07-7.51) were found significantly associated with increased severity of dysmenorrhea. Meanwhile, family history of dysmenorrhea (p=0.296), menstrual cycle interval, and caffeine intake were not significantly associated. This study concluded that a high prevalence of dysmenorrhea among female adolescent aged 15-17 years in Surakarta was detected, and factor associated with its severity were age of menarche, menstrual duration, pain onset, and pain duration.
Keywords : Primary dysmenorrhea, menstruation, pain, prevalence
Scientific and Methodological Approaches to Improve the Development of Low-Permeability Oil Reservoirs Using Horizontal Wells with Multiple Hydraulic Fracturing on the Territory of LLC RN-Yuganskneftegaz Activity
Authors: Kolonsky Alexander , Toropov Konstantin , Sergeychev Andrew , Murtazin Ramil , Topolnikov Andrew , Antonov Maksim , Khadiyev Ruslan 
Published: October 2019

Summary
The paper presents the results of: 1) various technologies testing for the development of low-permeability reservoirs using horizontal wells with multi-stage hydraulic fracturing of formation (HW with MHFF); 2) the increase of the repeated fracturing operations efficiency in vertical wells by taking into account geomechanical effects.
The marker and geophysical methods for determining the flow profile of the HW with MHFF are compared with the calculations results of the hydrodynamic model. The results were applied to determine the optimal types of well completion, planned to further improvement of approaches to the development of low-permeability oil deposits. Also the technological capabilities of the flow profile research methods of and the directions of their further development were determined.
CO2 Assisted Steam Flooding Technology after Steam Flooding - A Case Study in Block J6 of Xinjiang Oilfield
Authors: Xi Changfeng , Qi Zongyao , Liu Tong , Zhang Yunjun , Zhao Fang , Yu Qingsen , Shen Dehuang , Li Xiuluan 
Published: October 2019

Abstract
Currently Block J6 is in the later stage of steam flooding after 27 years’ steam injection, its recovery factor is about 50%, and the water cut is more than 95%. Particularly, the present steam oil ratio is about 12 m3(CWE)/t which has reached the economic limit and is in ineffective development. Cores from four post steam flooding drilling wells show that only top 2-3m of the total 25-30m pay zone has a steam chamber which is the main steam channel and its residual oil saturation is about 20%, the other 22-27m pay zone is displaced by hot water and its oil saturation is 40-55%. A 3D physical simulation show the conventional steam flooding with full interval perforation quickly broke through from the top of reservoir, and the steam oil ratio rose rapidly from 5 m3(CWE)/t to 10 m3(CWE)/t. The recovery factor was only 20.1% at the time of steam breakthrough, and then it was in the phase of high steam oil ratio for a long time. During CO2 assisted steam flooding the whole perforated producer is switched into a low half perforated well, and the recovery factor increases from 20.1% to 81.1%, the steam oil ratio is 3.3m3(CWE)/t. There are three characteristics in CO2 assisted steam flooding stage, firstly there is a steam and CO2 assisted gravity drainage mode, steam chamber expands from the top 2-3cm to the total 20cm oil layer. Secondly, there is a stable emulsion foam oil, its water cut is 60-70%, CO2 liquid ratio is about 5:1 Sm3/t, CO2 is a kind of dispersed bubble so it is much more than the dissolved CO2 liquid ratio 2:1 Sm3/t. Thirdly, CO2 lows the heatloss to overburden and keeps the formation pressure. The calculation shows that the heat loss can be reduced by more than 10% in the top layer. A pilot test including 9 well patterns(49 wells) has been established, and its recovery factor will be up to 75%, and the steam oil ratio will up to 2 m3(CWE)/t, a good production performance is predicted optimistically.
The First Successful Experience of Directional Casing Drilling Technology in Timano-Pechora Region, Russia
Authors: Fatkulin Sergey , Egorov Petr , Gumich Dmitrii , James Biju , Zabuga Sergey , Karimov Jalal , Konysbekuly Galymzhan , Smelov Dmitry , Merzlyakov Alexander , Ryabov Ilya 
Published: October 2019

Abstract
Well drilling is a very technologically complicated process which consists of different stages and operations. Using different technologies to reduce well construction time is important to optimize well drilling costs. Geological complications can increase the time for pulling out the bottom hole assembly (BHA), condition the well, and running casing. Several studies have shown that nondrilling non-productive time (NPT) is significantly higher than actual drilling time. Casing while drilling (CWD) technology is a unique solution which helps to reduce well construction time in challenging formations while drilling and casing the well simultaneously.
Conventional drilling process involves drilling and casing sections in separate operations. CWD involves integrating the casing run process with the drilling process. In casing while drilling, the bottom hole assembly is attached to the casing using a drill lock assembly (DLA). It is challenging to drill and case directional well because the BHA consists of specialized directional tools such as a bend motor, rotary steerable tools, measuring while drilling tools, etc. After reaching the required depth by using specialized tools, the directional BHA is retrieved and casing is cemented.
Pilot test runs for directional casing drilling with retrievable bottom hole assembly technology were successfully conducted in Timano-Pechora region. Three directional wells were drilled with CWD technology on 244,5 mm (9 5/8") casing. There was no NPT during the operations. Casing while drilling technology alongside a steerable and retrievable BHA enabled the operator to drill a directional section in soft and unstable rock, hold trajectory according to plan and meet necessary dogleg severity, exclude the possibility of stuck pipe, and reduce well construction time by decreasing the number of wiper trips in open hole. The pilot experience helped to determine the advantages of casing drilling with a retrievable BHA in the specific conditions of the Timano-Pechora region. Tips for improvement and optimizations were highlighted for future reference of that technology in the region.
Way to a Perfect Well: Successful Story of Multi-Fracturing Well Completion on Achimov Formation Novo Urengoyskoe Field
Authors: Savelyev Alexandr , Sergeev Paul , Prokhorov Alexey , Nikitin Paul , Khomets Ivan , Leguta Michael , Zakharzhevsky Yuri , Koltypin Oleg 
Published: October 2019

Summary
Developing Achimov gas condensate deposits with horizontal wells and subsequent multistage hydraulic fracturing has recently become important for the oil and gas industry of the Russian Federation. An abnormally high reservoir pressure and a narrow safe range of mud density values complicate both wells’ drilling and completion. This paper presents a description of a successful design, completion and subsequent implementation of multistage hydraulic fracturing in the Achimov deposits of the Novo-Urengoysky license area (ROSPAN INTERNATIONAL, JSC).
To mitigate the risk of completion equipment failure and to minimize friction pressure due to drilling mud and fracking gel incompatibility, calcium bromide-based heavy brine was used as a completion fluid for the first time in the Company's history.
In order to eliminate a blowout hazard while performing multi-stage hydraulic fracturing, as well as during subsequent well operations, a special upper completion system, which included a subsurface control valve, was used.
Multi-stage hydraulic fracturing with a significant mass of proppant (a large volume multi-stage fracturing) was selected as means of enhanced oil recovery. The average weight of proppant in each fracturing operation was 200 tons, the fluid injection rate was 3.5 m3/min, which ensured placing the designed amount of proppant and creating a planned geometry fracture.
Successful Implementation of Managed Pressure Drilling Technology Under the Conditions of Catastrophic Mud Losses in the Kuyumbinskoe Field
Authors: Galimkhanov Aydar , Okhotnikov Denis , Ginzburg Leyb , Bakhtin Andrey , Sidorov Yuliy , Kuzmin Pavel , Kulikov Stanislav , Veliyev Gurban , Badrawi Maytham 
Published: October 2019

Abstract
This paper presents a study, illustrating results of effective cooperation between the Operator Company of the Kuyumbinskoye field, Drilling Contractor, and Service Company involved in the construction of the horizontal well using the technology of Managed Pressure Drilling (MPD). This article also describes the challenges encountered and successfully implemented engineering solutions permitting to meet these challenges.
The main challenge in the Kuyumbinskoye field is the high risk of mud losses in the productive interval. The complex geological conditions as well as the anisotropy of the productive horizon complicate the prediction of catastrophic mud losses zones location. Approximately 50% of the wells were not drilled to the planned depths.
To solve this problem, in 2017 a pilot project using MPD technology was initiated. The main goals to be reached by the implementation of this technology were drilling efficiency improvement, risk management, and well construction cost efficiency improvement. In order to achieve the goals, equipment was selected, a comprehensive well construction program was developed and detailed work plans were prepared.
As a result of thorough planning and close cooperation at all work stages; the multidisciplinary team successfully completed the construction of 11 wells with an average extension of a horizontal interval of approximately 1000 m, drastically reducing fluid losses and associated non-productive time (NPT). By eliminating NPT and thus increasing the effective rate of penetration (ROP) during one of the wells, the drilling time of the lateral section was reduced to seven days, comparing to an average drilling time of the horizontal section of approximately 20-25 days (with conventional drilling). In addition, the average losses of drilling fluid per well were decreased by more than 1000 m3. The application of specially developed technological solutions during this pilot project not only ensured the attainment of target depths and geological objectives but also confirmed the potential of producing crude oil while drilling. Thus, allow to replenish encountered losses "on the fly" and to save time otherwise required to spend on the drilling fluid preparation.
In addition to a technological breakthrough, it is important to emphasize that a high level of Health, Safety, Quality, and Environmental protection (HSQE) was achieved, and no major incidents or accidents were recorded during the entire project. Based on the lessons learned, several engineering, organizational and strategical resolutions were made to further streamline and optimize the well construction process in the field.
Not Too Hot to Handle: Water Based Fluid Drills High Temperature Wells
Authors: Pino Rafael , Abouhamed Amr , Addagalla Ajay , El Dakroury Hesham 
Published: October 2019

Abstract
Most high temperature (HT) wells are drilled with oil or synthetic-based drilling fluids (O/SBM) for a variety of reasons. These O/SBM drilling fluids are naturally lubricious due to the hydrocarbon continuous phase, which also contributes to improved wellbore stability, as the fluids are relatively inert to the formations being drilled. These fluids also have acceptable temperature stability and drilling performance, which makes them suitable for several applications. Downhole losses with O/SBM can be costly and difficult to cure. Additional O/SBM can be mixed at the rig site, but this requires a supply of base oil to be available and the fluid can take time to prepare. The ideal scenario is to have a facility close to the rig location that can supply the high volumes of premixed O/SBM and base oil required.
Exploratory wells are often drilled in remote locations with no convenient liquid mud plant close by to service the O/SBM requirements. Acquisition of good quality logging data from exploratory wells is crucial to understanding the field potential for commercial development. Some of the more sophisticated logging tools available in the industry are incompatible or difficult to run and interpret in an O/SBM environment. In such cases a water based drilling fluid (WBM) can be the solution. The logistic requirement for WBM is significantly lower than for O/SBM, as chemicals can be stored on location and water can be supplied from a nearby water well. WBM is much simpler to prepare than O/SBM, so WBM can be quickly prepared as required, and WBM downhole losses can often be cured more easily. Typical polymer-based WBM does not have high temperature stability, and is usually restricted to wells where the bottomhole temperature is less than 300°F.
This paper will discuss the design, testing, and field application of a WBM for HT applications. To design a temperature stable HT-WBM fluid requires the use of drilling chemicals that can function adequately in a harsh environment.
These wells required temperature tolerant polymers that provide an acceptable rheological profile and controlled fluid loss, so the wells can be safely drilled with no major complications. The HT-WBM was used to successfully drill, core, log, and case wells with bottomhole temperatures higher than 375°F.
Applying a Resin-Cement System to Help Prevent Fluid Migration in the Annulus: Case Study, Western Siberia
Authors: Baklushin Mikhail , Velikaya Nailya , Zyryanov Viktor , Vologdin Dmitriy 
Published: October 2019

Abstract
Production sections of Western Siberian wells consist of gas, oil, and water-saturated sandstones; therefore, it is extremely important to help ensure zonal isolation to help prevent fluid migration from the overlaid water and gas formations into the oil-producing zones. Isolating the water and gas zones with conventional cement has not been a complete success because fluid migration was experienced through a channel or damage to the cement sheath. A typical solution sets an annular packer in the production casing zone beneath the gas and water-bearing sandstones as backup if the cement fails to provide a full annular barrier.
Using the annular packer has some limitations, and potential risks of early activation or nonactivation of the annular packer often contributes to nonproductive time (NPT). An alternative solution used in Western Siberia combines resin-polymer and cement, which provides a cement sheath with improved mechanical properties, such as reduced permeability, increased ductility, and improved shear bond to casing. The successful use of a resin-polymer cement blend as an alternative to using an annular packer, advantages of using this system, and recommendations for implementing this technology are discussed.