bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acceleration Pattern and Neuromuscular Response of the Spine and Ankle During the Limits-of-Stability Test
Authors: Kuo Fang-Chuan 
Published: March 2019

Abstract
Kuo, FC. Acceleration pattern and neuromuscular response of the spine and ankle during the limits-of-stability test. J Strength Cond Res 34(3): 857–865, 2020—This study aimed to explore the acceleration amplitude, frequency, and electromyography (EMG) activity at the spine, pelvis, and lower extremities under various platform-stability settings. Thirty two young adults (16 men and 16 women) were recruited from a university in Taiwan. A balance system for limits-of-stability testing was used with 2 platform stability settings (i.e., level 4 and static). An inertial motion system and a telemetry EMG system were used to record kinematic and EMG data. Consequently, compared with the level 4 setting, the static-level setting required greater thoracic lateral flexion, pelvic course, and pelvic pitch; greater acceleration amplitudes of the spine, pelvis, and thigh; and greater acceleration frequencies at the shin and ankle. Participants exhibited a significant increase in knee flexion, ankle abduction, foot acceleration, and activity of the rectus femoris and tibialis anterior muscles when the platform stability was decreased. In addition, higher median frequencies of the spine and pelvis and larger amplitudes of the foot were observed under the level 4 setting. The men exhibited a larger range of motion in lumbar joint and thoracic rotation than did the women. To maintain stability, subjects must readjust their head, spine, and ankle movement amplitudes and frequencies depending on the platform stability. The study findings suggest the use of static platform settings for spine control facilitation and unstable platform settings for proprioception and muscle strengthening of lower extremity.
Eliciting Postactivation Potentiation With Hang Cleans Depends on the Recovery Duration and the Individual's 1 Repetition Maximum Strength
Authors: Dinsdale Alexander J. , Bissas Athanassios 
Published: March 2019

Abstract
Dinsdale, AJ and Bissas, A. Eliciting postactivation potentiation with hang cleans depends on the recovery duration and the individual's 1 repetition maximum strength. J Strength Cond Res 35(7): 1817–1824, 2021—Acutely coupling biomechanically similar resistance exercises (e.g., back squats) with subsequent explosive movements (e.g., countermovement jumps [CMJs]) can elicit an enhancement in explosive force and power production, which is known as postactivation potentiation (PAP). However, limited information exists with regard to the coupling of hang cleans with the CMJ. The purpose of this study was to determine the effectiveness of the hang clean at eliciting PAP through the systematic appraisal of the implemented recovery interval. Twelve explosively trained male track and field athletes completed 8 randomized protocols. These consisted of a structured warm-up, 3 baseline CMJs performed on a force platform, 3 reps of hang cleans set at 90% of 1 repetition maximum (1RM), a randomized rest, and 3 post-CMJs. The rest intervals were set at 0 (T0), 1 (T1), 2 (T2), 3 (T3), 4 (T4), 5 (T5), and 6 (T6) minutes after completing the hang cleans. A repeated-measures analysis of variance showed that the hang cleans did not elicit PAP, although there were significant (p < 0.05) decreases in jump height (JH) for T0 (−4%), T2 (−3%), and T3 (−3.3%). Interestingly, when splitting the subjects based on absolute 1RM hang clean (above 80 kg = strong and below 80 kg = weak), significant differences (p < 0.05) in JH were observed between the groups at T1 (strong −1.2% and weak +3.8%) and T5 (strong +5.1% and weak −1.9%). Our results suggest that to elicit PAP when using hang-clean protocols, it is important to establish first the function between individual strength levels and recovery duration as this may lead to contrasting optimal performance windows for different explosively trained athletes.
Lactate Concentration Is Related to Skin Temperature Variation After a Specific Incremental Judo Test
Authors: Gomes Moreira Danilo , José Brito Ciro , de Almeida Ferreira José Jamacy , Bouzas Marins João Carlos , López Díaz de Durana Alfonso , Couceiro Canalejo Jorge , Butragueño Revenga Javier , Sillero-Quintana Manuel 
Published: March 2019

Abstract
Gomes Moreira, D, José Brito, C, de Almeida Ferreira, JJ, Bouzas Marins, JC, López Díaz de Durana, A, Couceiro Canalejo, J, Butragueño Revenga, J, and Sillero-Quintana, M. Lactate concentration is related to skin temperature variation after a specific incremental judo test. J Strength Cond Res 35(8): 2213–2221, 2021—This study aimed to analyze the skin temperature (tsk) response in judokas after a specific incremental test and to determine whether anthropometric and physiological measures can be explained by the variation in mean tsk. A total of 23 male judo athletes (age: 20.1 ± 4.7 years; height: 173.1 ± 8.1 cm; and body mass: 71.7 ± 8.1 kg) performed a specific incremental judo test. Skin temperature evaluations were collected in 26 regions of interest (ROIs), and the mean tsk was calculated using an equation including 10 of them. The time points before the test (pre-test), immediately after (0 minutes), and after 5, 10, and 15 minutes of the test were established to measure the tsk, mean tsk, auricular temperature (tau), and blood lactate (LAC). The athletes completed a mean of 7.0 ± 1.0 stages of the test, 95% confidence interval (CI; 6.2–7.1). The V̇o
2peak achieved was 48.7 ± 5.3 ml·kg−1·min−1, 95% CI (46.4–51.0). Compared with pre-test values, only the forehead significantly decreased 5 minutes after the test (p < 0.05). The posterior right arm and posterior left arm remained increased 10 minutes after the test (p < 0.05). After 15 minutes, 19 of the 26 ROIs analyzed were significantly decreased (p < 0.05). Among all tested models of linear regression, only 2 were significant, the difference of tsk 5 minutes compared with pre-test (F
1, 21 = 16.49, p = 0.001) and the difference of tsk 10 minutes compared with pre-test, to predict LAC concentration at the end of the test (F
1, 21 = 9.30, p = 0.006). We concluded that 5 minutes after the test, the judokas present a higher tau and a higher tsk in 7 ROIs, and the tsk decreases 15 minutes after the test in 19 of the considered ROIs. The variation of mean tsk 5 and 10 minutes after the test compared with pre-test values is associated with blood LAC at the end of the test.
Walking and postural balance in adults with severe short stature due to isolated GH deficiency
Authors: Santana-Ribeiro Ananda A , Moreira-Brasileiro Giulliani A , Aguiar-Oliveira Manuel H , Salvatori Roberto , Carvalho Vitor O , Alvim-Pereira Claudia K , Araújo-Daniel Carlos R , Reis-Costa Júlia G , Andrade-Guimarães Alana L , Oliveira-Santos Alécia A , Vieira Edgar R , Gois-Junior Miburge B 
Published: March 2019

Objectives
Walking and postural balance are extremely important to obtain food and to work. Both are critical for quality of life and ability to survive. While walking reflects musculoskeletal and cardiopulmonary systems, postural balance depends on body size, muscle tone, visual, vestibular and nervous systems. Since GH and IGF-I act on all these systems, we decided to study those parameters in a cohort of individuals with severe short stature due to untreated isolated GH deficiency (IGHD) caused by a mutation in the GHRH receptor gene. These IGHD subjects, despite reduction in muscle mass, are very active and have normal longevity.

Methods
In a cross-sectional study, we assessed walking (by a 6-min walk test), postural balance (by force platform) and fall risk (by the 'Timed Up and Go' test) in 31 IGHD and 40 matched health controls.

Results
The percentage of the walked distance measured in relation to the predicted one was similar in groups, but higher in IGHD, when corrected by the leg length. Absolute postural balance data showed similar velocity of unipodal support in the two groups, and better values, with open and closed eyes and unipodal support, in IGHD, but these differences became non-significant when corrected for height and lower-limb length. The time in 'Timed Up and Go' test was higher in IGHD cohort, but still below the cut-off value for fall risk.

Conclusion
IGHD subjects exhibit satisfactory walking and postural balance, without increase in fall risk.
Виробничий потенціал сільських територій: стан та рівень використання в умовах забезпечення продовольчої безпеки регіону
Authors: Довгаль Олена Валеріївна 
Published: March 2019

У статті досліджується сучасний стан виробничого потенціалу сільської місцевості регіону, аналізується рівень його використання з точки зору забезпечення продовольчої безпеки. Визначено, що зі збільшенням частки сільськогосподарських підприємств у валовій продукції підвищується рівень використання виробничого потенціалу (продуктивності праці) сільських районів Чорноморського регіону.Аналіз матеріально-технічного забезпечення сільгоспвиробників дозволив з'ясувати, що фактором інтенсифікації виробництва і, відповідно, зростання продуктивності праці (підвищення рівня використання виробничого потенціалу) є не тільки наявність певну кількість сільськогосподарської техніки, а саме її потужність.Пояснюючи низький рівень використання виробничого потенціалу сільських районів Одеської області і його порівняно високу цінність в Миколаївській і Херсонській областях, є рівень застосування іригаційних систем. Аналіз статистичних даних показав, що існує значна невідповідність між наявністю машин і пристроїв для зрошення і наявністю водяних насосів і насосних станцій на сільськогосподарських підприємствах в Одеській області. Особливістю сучасного стану використання водних ресурсів в степовій зоні України є значне зниження дебіту води в поверхневих водоймах - річках, ставках, озерах. Найбільший рівень еластичності між досліджуваної функцією і фактором спостерігається в Миколаївській області - при збільшенні частки сільськогосподарських підприємств у виробництві валової продукції збільшується на 335,4 грн. (на людину). Найнижча еластичність в Одеській області. Встановлено, що високий рівень продуктивності праці на аграрних підприємствах Прічноморского району в порівнянні з рівнем сільськогосподарської техніки обумовлений специфікою розселення сільських територій відповідних регіонів - історично однією з найбільш низької щільності населення на одиницю території. ,Пояснюючи низький рівень використання виробничого потенціалу сільських районів Одеської області і його порівняно високу цінність в Миколаївській і Херсонській областях, є рівень застосування іригаційних систем. Існує значна невідповідність між наявністю машин і пристроїв для поливу і наявністю водяних насосів і насосних станцій на сільськогосподарських підприємствах в Одеській області.
KALKINMADA EĞİTİM SÜRECİNİN İKTİSADİ ANALİZİ
Authors: TUNÇ Mehtap , TAŞDÖKEN Öznur 
Published: March 2019

Fiziki
sermayenin yanı sıra insan sermayesi, büyüme ve kalkınma sürecini etkileyen
önemli bir unsurdur. 1980’li yılların sonuna doğru neo-klasik iktisatçılar
tarafından ileri sürülen yakınsama teorisinin reddedilmesiyle içsel büyüme
kuramları doğru ortaya çıkmıştır. İçsel büyüme kuramları iktisadi büyümeye etki
eden faktörlerden biri olarak kabul edilen insan sermayesi değişkenini dikkate
almaktadır. Bu doğrultu da yapılan çalışmalarda insana yatırım düzeyini
etkileyen eğitim, sağlık, ar-ge harcamaları gibi faktörlere yapılan
yatırımların iktisadi büyümeyi etkilediği sonucuna ulaşılmıştır. Bu çalışmada,
eğitim harcamalarında meydana gelen değişimin ülkelerin uluslararası alanda
katıldığı sınavlardan olan TIMMS ve PISA sınavı puanları ile arasındaki
ilişkinin belirlenmesi amacıyla sınava katılan ülkeler üzerinden analiz
yapılmıştır. Ülkelerin orta öğretime yaptığı eğitim yatırımları ve TIMMS sınavı
1995-2015 yıllarında matematik ve fen puanları alınmıştır. Ayrıca, PISA sınavı 2000-2015 yılları arasında okuma,
fen ve matematik sınavı puanları ele alınarak rassal etki panel veri modeli
yapısında genelleştirilmiş en küçük kareler yöntemi kullanılmıştır. Elde edilen
bulgular doğrultusunda PISA ve TIMMS sınavında ülkelerin iktisadi büyümeleri
ile eğitim kalitesi arasındaki istatistiksel olarak anlamsız olduğu, ülke
bazında incelendiğinde ise bazı ülkelerin istatistiksel olarak anlamlı olduğu sonuçları
elde edilmiştir.
Современные парафразы шекспировского «Гамлета» (Ина Голдин и Борис Акунин)
Authors: Июдин Даниил Андреевич 
Published: March 2019

<p>В статье рассматриваются два парафраза «Гамлета» У. Шекспира: «Гамлет. Версия» Бориса Акунина и «В ожидании Фортинбраса» Ины Голдин. Эти произведения отражают современные тенденции развития литературы и выражают уровень амбиций авторов. Сопоставительный анализ сюжетов, систем персонажей, особенностей языка современных литературных адаптаций и поэтики шекспировского «Гамлета» показывает их достоинства и недостатки.</p><p>В пьесе «Гамлет. Версия» Б. Акунин сохраняет лишь некоторые эпизоды трагедии Шекспира, лишая сюжет глубины, а поступки героев мотивировки. Писатель предлагает читателю очередную версию излюбленной им «теории заговоров»: миром правят интриганы и подлецы, а шпионы выигрывают войны. В постмодернистском рассказе «В ожидании Фортинбраса» И. Голдин создает абсурдный сюжет, действие перенесено в современность. Герои рассказа — наркоманы и убийцы, их жизнь бессмысленна, порядок может навести лишь Фортинбрас.</p><p>По мнению автора статьи, создатели двух парафразов едва ли стремились состязаться с прославленным драматургом Шекспиром. Создается впечатление, что их версии являются упражнениями в «копирайтинге», цель которых — развлечение читателя.</p>
THD and Compensation Time Analysis of Three-Phase Shunt Active Power Filter Using Adaptive Spider Net Search Algorithm (ASNS) for Aircraft System
Authors: Khalid Saifullah 
Published: March 2019

A novel Adaptive Spider Net Search Algorithm (ASNS) has been presented, which has been used for the optimization of conventional control scheme used in shunt active power filter for aircraft system. The superiority of this algorithm over existing Genetic Algorithm results has been presented by analyzing the THD and compensation time of both the algorithms. The simulation results using MATLAB model ratify that algorithm has optimized the control technique, which unmistakably prove the usefulness of the proposed algorithm in aircraft supply system.
Machine Learning Application for Oil Rate Prediction in Artificial Gas Lift Wells
Authors: Khan Mohammad Rasheed , Alnuaim Sami , Tariq Zeeshan , Abdulraheem Abdulazeez 
Published: March 2019

Abstract
Well production rate is one of the most critical parameters for reservoir/production engineers to evaluate performance of the system. Given this importance, however, monitoring of production rates is not usually carried out in real time. Some cases flowmeters are used which are known to carry their own inherent uncertainties. The industry, thus, relies on the use of correlations to allocate production to wells. Over time, it has been realized that the generally used correlations are not effective enough due to multiple technical and economic issues.
The focus of this work is to utilize machine learning (ML) algorithms to develop a correlation that can accurately predict oil rate in artificial gas lift wells. The reason for using these algorithms is to provide a solution that is simple, easy to use and universally applicable. Various intelligent algorithms are employed, namely; Artificial Neuro Fuzzy Inference Systems (ANFIS), and Support Vector Machines (SVM), along with the development of Artificial Neural Network providing a usable equation to be applied on any field, hence demystifying the black-box reputation of artificial intelligence. In addition, non-linear regression is also performed to compare the results with ML methods.
Data cleansing and data-reduction were carried out on the dataset comprising of 1500 separator test points. This practice yielded in only the common wellhead parameters to be used as input for the model. All ML models were compared with the non-linear regression model and with previously derived empirical models to gauge the effectiveness of the work. The newly developed model using ANN shows that it can predict the flow-rate with 99% accuracy. This is an interesting outcome, as such accuracy has not been reported in literature usually.
The results of this study show that the correlation developed using ANN outperforms all the current empirical correlations, moreover, it also performs multiple times better in comparison to previously developed AI models. In addition, this work provides a functional equation that can be used by anyone on their field data, thereby removing any ambiguities or confusion related to the concept of artificial intelligence expertise and software. This effort puts forth an industrial insight into the role of data-driven computational models for the production reconnaissance scheme, not only to validate the well tests but also as an effective tool to reduce qualms in production provisions.
The Geology and 3D Modelling of the Cliff Head Oil Field, Australia
Authors: Eshmawi Yosuf 
Published: March 2019

Abstract
The Cliff Head is one of the most significant discoveries in the offshore Northern Perth Basin. Hence, understanding the structure and geology of the field is essential to further evaluate the offshore region in the basin. Two structural models were developed with the objective to achieve a better understanding of this field. The first model is focused on the Permian and older strata, while the second model is for the overburden. In addition, reservoir properties models (e.g. porosity model and water saturation model) were developed to better understand the reservoir facies and hydrocarbon distribution. Examination of the structural models has shown that there are two main sets of faults within the Cliff Head area, which can be categorized into the following: the deep Permian faults that are truncated against the Late Permian unconformity, and younger Cretaceous faults that were developed during the Early Cretaceous rifting. It has also shown that the oil accumulation within the field is structurally trapped within Permian aged set of horsts and is mainly reservoired within the Irwin River Coal Measures. The secondary target (e.g. the underlying High Cliff Sandstone) is mostly beneath the regional oil-water contact of −1257.8 m TVDss, except in the highest structural point in the field, where Cliff Head-6 was drilled. The Irwin River Coal Measures in the study area contained four high resolution depositional sequences that displayed a finingupward pattern as depicted by the Gamma Ray log response and are interpreted to have mainly deposited in a fluvial depositional system. The High Cliff Sandstone, in contrast, contained two high resolution depositional sequences that displayed a coarsening upward sequences as supported by Gamma Ray log response and were interpreted to have mainly deposited in marginal marine settings. Reservoir properties modeling was also conducted utilizing the 3D models, where a 3D porosity model was calculated and shows that the Irwin River Coal Measures, in general, exhibit higher porosity distribution than the underlying High Cliff Sandstone, even though the later has coarser and more laterally extensive sand sheets. This is probably attributed to diagenetic porosity reduction within the High Cliff Sandstone caused by the formation waters. The calculated 3D water saturation model also confirms the presence of a single regional oil-water contact within the field and hence, reservoir heterogeneities and fault seal capacities did not affect the hydrocarbon distribution within the field. Finally, all the calculated models (e.g. lithofacies model, porosity model, and water saturation model) were integrated to estimate the recoverable hydrocarbons in place, where the Cliff Head is estimated to contain a total of 15.2 million barrels.
Research and Application of Rod/Tubing Wearing Prediction and Anti-Wear Method in Sucker Rod Pumping Wells
Authors: Zhao Ruidong , Li Jinya , Tao Zhen , Liu Meng , Shi Junfeng , Xiong Chunming , Huang Hongxing , Sun Chengyan , Zhang Yufeng , Zhang Xiaowen 
Published: March 2019

Abstract
With the development of many kinds of oilfields, deep well, high deviated well and cluster well are increasing rapidly. Sucker rod pumping still remains a major artificial lift method. There are such problems as severe rod/tubing wearing and shortened rod/tubing life in high deviated rod-pumped wells, and the mechanism and prevention of rod/tubing wearing have not been understood properly.
In order to understand the mechanism of rod/tubing wearing, a lateral load calculation model of rod/tubing is solved in this paper. The calculation results show that both the magnitude and direction of lateral force change dynamically with time and space in one stroke cycle. To better describe the rod/tubing wearing phenomenon, the lateral load is divided into two parts: the primary normal vector related to wellbore trajectory and axial force, and the secondary normal vector only related to wellbore trajectory and invariant with time.
The three-dimensional and dynamic nature of lateral force can account for the rod/tubing wearing partially. The results of mathematical model show that the magnitude of lateral force at the same depth may differ greatly at different times, and its direction may also change periodically. It is likely to be bidirectional rod/tubing wearing when the primary normal force direction changes periodically. Simulation results show that the direction of lateral force is very likely to change periodically below the neutral point of rod string. This finding has accounted for the common double-faced and multi-faced rod/tubing wearing on the lower rod string. The periodic change of lateral force direction will cause rod/tubing collision, which is also an important cause for the rod/tubing wear below the neutral point. It is assumed qualitatively that the production parameters such as pump depth, stroke, stroke frequency and pump diameter are the major factors of the rod/tubing wearing according to field experience. In this paper, mathematic model is used to analyze the impact of these parameters on lateral force and the quantitative analysis is also conducted which provide theoretical foundation for the design of anti-wear production parameters.
The mathematic model and method proposed in this paper are favorable to better accounting for the important phenomenon of rod/tubing wearing in rod-pumped deviated wells. They are capable of the quantitative calculation of lateral forces under different parameter conditions and the anti-wear design. This model has been applied to hundreds of highly deviated wells at Jidong Oilfield, prolonging rod/tubing life 58 days in average.
Drilling Process Digitalization Using Advanced Machine Learning Techniques – Case Study
Authors: Shayaa Adel Al , Tamimi Khaled Al , Bakhti Sara , Arnaout Arghad , Thonhauser Gerhard 
Published: March 2019

Abstract
The digital era is upon us in the oil and gas industry, enforcing the importance of integrating this novel concept of digital transformation is mandatory to improve the overall efficiency of the drilling process. The advances in Artificial Intelligence for the industry, and the methodology of how these solutions can be implemented will be addressed in this paper.
The digital transformation of drilling will provide an unprecedented stream of high-quality information that has never been accomplished in the industry, through the utilization of automated real-time drilling downhole tools, data analytics and predictive analysis.
Therefore, a real-time measurement and processing technology based on automated rig activities detection was established to improve the performance of the rig crew and drilling operations of an international operating company. A monitoring process was implemented for all drilling operations and benchmarked against operational Key Performance Indicators (KPIs).