bluuebunny/crossref_metadata_2025_split huggingface dataset:
Mathematical Model of a Fractional Nonlinear Mathieu Oscillator
Authors: Отенова А.Ж. , Паровик Р.И. 
Published: March 2024

В работе проводится исследование дробного нелинейного осциллятора Матье методами численного анализа с целью установления его различных колебательных режимов. Дробный нелинейный осциллятор Матье представляет собой обыкновенное нелинейное дифференциальное уравнение с дробными производными в смысле Герасимова-Капуто и локальными начальными условиями (задача Коши). Дробные производные Герасимова-Капуто характеризуют наличие эффекта наследственности в колебательной системе. В такой системе текущее ее состояние зависит от предыстории. Для исследования задачи Коши был применен численный метод из семейства предиктор-корректор — метод Адамса-Башфорта-Мултона, алгоритм которого был реализован в системе компьютерной математики Matlab. С помощью численного алгоритма для различных значений параметров дробного нелинейного осциллятора Матье были построены осциллограммы и фазовые траектории. Показано, что в отсутствии внешнего периодического воздействия в рассматриваемой колебательной системе могут возникать автоколебания, которые на фазовой траектории характеризуется предельными циклами. Проведено исследование предельных циклов с помощью компьютерного моделирования. Показано, что также могут возникать апериодические режимы, т.е. режимы, не относящиеся к колебательным. Поэтому порядки дробных производных могут влиять колебательный режим нелиненого дробного осциллятора Матье: от колебаний с постоянной амплитудой до затухающих и исчезающих совсем.
The work studies the fractional nonlinear Mathieu oscillator using numerical analysis methods in order to establish its various oscillatory modes. Mathieu’s fractional nonlinear oscillator is an ordinary nonlinear differential equation with fractional derivatives in the Gerasimov-Caputo sense and local initial conditions (Cauchy problem). Gerasimov-Caputo fractional derivatives characterize the presence of the heredity effect in an oscillatory system. In such a system, its current state depends on the previous history. To study the Cauchy problem, a numerical method from the predictor-corrector family was used – the Adams-Bashforth-Moulton method, the algorithm of which was implemented in the Matlab computer mathematics system. Using a numerical algorithm, oscillograms and phase trajectories were constructed for various values of the parameters of the Mathieu fractional nonlinear oscillator. It is shown that in the absence of an external periodic influence, self-oscillations can arise in the oscillatory system under consideration, which are characterized by limit cycles on the phase trajectory. A study of limit cycles was carried out using computer simulation. It has been shown that aperiodic regimes can also arise, i.e. modes that are not oscillatory. Therefore, the orders of fractional derivatives can be influenced by the oscillatory mode of a nonlinear fractional Mathieu oscillator: from oscillations with a constant amplitude to damped ones and disappearing completely.
3D Reconstruction of Femur using Ultrasound - Hand Guided Evaluation and Autonomous Robotic Approach
Authors: Phlippen Lovis , Hohlmann Benjamin , Radermacher Klaus 
Published: March 2024

Total Knee Arthroplasty is a frequently performed surgery. Patient specific planning and implants may improve surgical outcome. For this purpose, 3D models of the bones are required, which are typically generated by using computed tomography. A radiation free and cheaper alternative could be ultrasound. However, bone segmentation and a competitive method of creating a complete bone model are a challenge.In this work a fully-automatic bone reconstruction pipeline using ultrasound, which includes machine learning based image segmentation and an interpolation algorithm for missing areas using statistical shape models, is presented and evaluation results with free hand probe guidance are outlined. A mean surface distance error of 0.96 mm for femur bone reconstruction is achieved. Furthermore, a robotic scanning approach is presented to automate the entire process. Autonomous scanning of the anterior distal femur was successful for 4 out of 5 probands. On average, 54 % of the accessed bone surface could be reconstructed.
Novel Patellofemoral Ligament Modelling to Detect Anterior Knee Pain After Total Knee Arthroplasty
Authors: Shimmin Andrew , Jagota Ishaan , Fritsch Brett , Parker David , Twiggs Joshua , Miles Brad 
Published: March 2024

Up to 35% of total knee arthroplasty (TKA) patients experience short term anterior knee pain (AKP) and up to 20% of non-revised knees experience anterior knee pain in the long term. Patellofemoral pain is the primary cause of AKP and accounts for over 8% of revision TKA procedures in Australia. This study introduces a geometric patello- femoral ligament analysis model which was used to differentiate between patients with and without post-operative anterior knee pain.All patients received pre- and post-operative CT scans and lateral flexed radiograph. The CT scans were segmented and landmarked before being registered to the flexed radiographs. The antero-posterior (AP) of the medial and lateral patellar edge relative to the medial and lateral femoral epicondyles were measured pre- operatively, post-operatively as well as the difference between the two states. These measurements were analysed for their impacts on patient outcome using the Kujala score.Both medial and lateral antero-posterior patellofemoral offsets had statistically significant, moderate inverse correlations with the overall Kujala score. However, no statistically significant relationship was observed between the post- operative Kujala score and the pre-operative AP offsets or the change in AP offset between the pre- and post-operative states.The results suggest that a higher medial or lateral post-operative patellofemoral AP offset, potentially due to the overstuffing of the patellofemoral joint, may result in inferior patient outcomes and residual AKP. Overall, it is imperative to consider the possible causes of post-operative AKP and models should be developed to inform surgeons in a clinical setting.
Pengaruh Model Pembelajaran Berbasis Masalah pada Kemampuan Literasi Ilmiah Siswa dalam Materi Transfer Panas Kelas V di Sekolah Dasar
Authors: Audina Khilda , Widya Murni Arie , Jannah Novaria Lailatul , Luqiyah Kartikasari Hikmah 
Published: March 2024

Thesis This aim For know influence of learning models based problem to ability literacy participant educate on the material displacement heat fifth grade school base . As for the background study This based on results interviews and observations carried out , where ability literacy science participant still studying in class V spelled out low as well as lack of understanding
teacher towards various various learning models . Study This carried out at SDN Banjarkemantren 2 in the even semester year 2022/2023 teachings . Method research used _ is Pre Experimental Design with One Group Pretest-Posttest Design type . Sample in study is participant educate VA class totaling 31 participants educate . Instruments used _ form instrument test form question choice double as well as sheet observation teacher and participant activities students , data obtained from test choice double and observation related with ability literacy science . Data analysis used the normality test and t-test. Analysis results show that the data is normally distributed because sig value . > 0.05 and in the t- test with using paired sample t-test results sig value <0.05 at level significance 5% then can it is concluded that h0 is rejected and ha is accepted . This matter show that application of learning models based problem give influence to ability literacy science participant educate on the material displacement heat in class V school base
Innovation of Interactive Tests in Maharah Kitabah in Class VIII Arabic Textbooks
Authors: Nurazim Okitra Asri , Baroroh R Umi 
Published: March 2024

Tests or evaluations applied by teachers or educators in various educational institutions are still considered less interesting and tend to be monotonous, so there is no intense interaction between educators and students in the evaluation process carried out. Often, students feel bored with ordinary tests or text forms that are rigid and monotonous, so there needs to be an update in the model or form of tests that are interactive, innovative, fun, and not boring for students. The purpose of this research is to develop various models of interactive Arabic tests or quizzes so that Arabic learning becomes more interesting and fun. This study uses literature research with a qualitative descriptive approach. Secondary data used as a data source, with data collection techniques in the form of documentation. And the result of this research is that there are various forms or models of interactive tests that can be utilized by teachers or instructors of the Arab language, either by developing their own using several computer-based applications or by utilizing website-based test or quiz applications that already exist on the Internet, where some of these applications can be accessed for free (free).
GAME EDUKASI MATCH PUZZLE MENGGUNAKAN ALGORITMA FISHER-YATES SHUFFLE BERBASIS ANDROID
Authors: Virginia Maria , Ginting Jusia Amanda 
Published: March 2024

<em>Games are one of the entertainment facilities that are in great demand by various groups and ages. Not just games, games can also be an interesting learning intermediary so that the learning process becomes more enjoyable. The use of games as a learning intermediary can improve the quality of learning because children are not easily bored in teaching and learning activities. A game that is suitable to support the quality of children's learning is a puzzle game where puzzle games train children to focus and solve the puzzles. The algorithm used to create the puzzle game is Fisher-Yates Shuffle. The Fisher-Yates Shuffle method is an algorithm that generates random permutations of an infinite set, in other words to randomize a set. The result of this research is an android-based puzzle educational game that implements the Fisher-Yates Shuffle algorithm to randomize puzzle objects so that users cannot memorize the position of objects. </em>
Basic study of kanji recognition patterns in non-kanji-background Japanese learners based on eye-movement analysis
Authors: Fukuda Makiko 
Published: March 2024

Learning kanji is one of the greatest challenges that non-kanji-background Japanese learners face. Kanji have a complicated structure and are fundamentally different from the characters of the Latin alphabet. Recognising them can thus be difficult for learners from places whose writing systems do not include kanji. Studies on the fixation and eye movements observed in kanji recognition by such learners are therefore important to clarify the kanji-recognition and -learning process. The present study attempts to shed light on this subject by using an eye-tracker to study such eye movements.
The analysis of the data obtained from the fixation and eye-movement experiments shows that students exhibit different kanji recognition patterns depending on how long they have been studying kanji: while students who have been studying kanji for a short time tend to look repeatedly at different parts of the kanji to grasp its shape and structure, those with more experience exhibit a pattern more similar to that of native Japanese speakers.
Pengaruh Metode Latihan Jarak Tetap Dan Jarak Bertahap Terhadap Kemampuan Passing Futsal
Authors: Yulianto Prabowo Hermawan , Nurhidayat Nurhidayat 
Published: March 2024

Futsal menjadi salah satu kegiatan ekstrakulikuler yang dilaksanakan di sekolah. Untuk meningkatkan mutu permainan futsal maka diperlukan kemampuan teknik dasar passing yang baik. Dalam meningkatkan kemampuan passing dapat dilakukan latihan jarak tetap dan jarak bertahap. Untuk itu penelitian ini bertujuan untuk mengkaji tentang pengaruh metode latihan jarak tetap dan jarak bertahap terhadap kemampuan passing futsal pada siswa SMA Negeri 2 Boyolali. Penelitian ini menggunakan metode penelitian kuantitatif eksperimen dengan mengambil sampel sebanyak 20 siswa dari 46 siswa yang mengikuti ektrakulikuler futsal. Pengambilan data dilakukan dengan pemberian tes pretest dan posttest, setelah seluruh data terkumpul maka dilakukan pengujian menggunakan bantuan SPSS. Pertama dilakukan uji prasayarat dengan uji normalitas Shapiro-Wilk dan uji homogenitas Levene, setelah uji prasyarat terpenuhi maka dilanjutkan dengan uji hipotesis dengan Uji Paired Sample T-Test. Dengan seluruh data telah di analisis maka diperoleh hasil bahwa disimpulkan bahwa tidak terdapat perbedaan signifikan dari implementasi passing jarak tetap dengan passing jarak bertahap. Namun, jika dilihat hasil rata-rata kemampuan passing futsal menunjukkan bahwa metode latihan jarak bertahap lebih efektif daripada metode latihan jarak tetap.

Kata kunci: futsal, jarak bertahap, jarak tetap, passing
Pengaruh Circuit Training Terhadap Umpan Jarak Jauh (Long Pass) Dan Kecepatan Tendangan Pemain Ssb Karlos Malang Usia 15 Tahun
Authors: Amri Biskhah Satria Prada  
Published: March 2024

Penelitian ini memiliki tujuan untuk melihat pengaruh circuit training terhadap long pass dan kecepatan tendangan pemain SSB Karlos Malang usia 15 tahun. Metode latihan untuk meningkatkan long pass dan kecepatan tendangan menggunakan metode latihan circuit training 7 pos latihan. Jenis penelitian ini termasuk penelitian pre-experimental, dengan rancangan one group pretest-posttest design. Populiasi pada penelitian ini sebanyak 101 pemain dan sampel yang sesuai kriteria sebanyak 15 pemain. Teknik pengambilan data menggunakan instrumen tes yaitu tes long pass dan tes kecepatan tendangan yaitu menggunakan tes shooting 16,5 meter. Data di uji dengan menggunakan uji normalitas, uji homogenitas dan uji hipotesis dengan uji t amatan ulangan (paired sample t-test) dibantu menggunakan aplikasi SPSS statistic for windows version 25. Teknik analisis data yang digunakan adalah uji t amatan ulangan (paired sample t-test) dengan signifikansi α < 0,05. Berdasarkan dari hasil analisis data, diperoleh bahwa circuit training memberi pengaruh signifikan terhadap peningkatan long pass pemain SSB Karlos usia 15 tahun (sig 0,000 < 0,05) dan circuit training memberikan pengaruh signifikan terhadap peningkatan kecepatan tendangan pemain SSB Karlos usia 15 tahun (sig 0,000 < 0,05). Hasil dari penelitian menunjukkan adanya pengaruh circuit training terhadap umpan jarak jauh (long pass) dan kecepatan tendangan.
Kata kunci; Circuit Training, Kecepatan Tendangan, SepakBola, Umpan Jarak Jauh (Long Pass)
Association Between Small Vessel Disease and Financial Capacity: A Study Based on Cognitively Normal Older Adults
Authors: Luo Xiao , Hong Hui , Li Kaicheng , Zeng Qingze , Liu Xiaocao , Hong Luwei , Li Jixuan , Zhang Xinyi , Zhong Siyan , Xu Xiaopei , Chen Yanxing , Zhang Minming , Huang Peiyu ,   for the Alzheimer’s Disease Neuroimaging Initiative
Published: March 2024

Background: Financial capacity is vital for the elderly, who possess a substantial share of global wealth but are vulnerable to financial fraud. Objective: We explored the link between small vessel disease (SVD) and financial capacity in cognitively unimpaired (CU) older adults via both cross-sectional and longitudinal analyses. Methods: 414 CU participants underwent MRI and completed the Financial Capacity Instrument-Short Form (FCI-SF). Subsequent longitudinal FCI-SF data were obtained from 104, 240, and 141 participants at one, two, and four years, respectively. SVD imaging markers, encompassing white matter hyperintensities (WMH), cerebral microbleeds (CMB), and lacune were evaluated. We used linear regression analyses to cross-sectionally explore the association between FCI-SF and SVD severity, and linear mixed models to assess how baseline SVD severity impacted longitudinal FCI-SF change. The false discovery rate method was used to adjust multiple comparisons. Results: Cross-sectional analysis revealed a significant association between baseline WMH and Bank Statement (BANK, β=-0.194), as well as between lacune number and Financial Conceptual Knowledge (FC, β= –0.171). These associations were stronger in APOE ɛ4 carriers, with β= –0.282 for WMH and BANK, and β= –0.366 for lacune number and FC. Longitudinally, higher baseline SVD total score was associated with severe FCI-SF total score decrease (β= –0.335). Additionally, baseline WMH burden predicted future decreases in Single Checkbook/Register Task (SNG, β= –0.137) and FC (β= –0.052). Notably, the association between baseline WMH and SNG changes was amplified in APOE ɛ4 carriers (β= –0.187). Conclusions: Severe SVD was associated with worse FCI-SF and could predict the decline of financial capacity in CU older adults.
Anatomical changes and dosimetric analysis of the neck region based on FBCT for nasopharyngeal carcinoma patients during radiotherapy
Authors: Chen Aoqiang , Chen Xuemei , Jiang Xiaobo , Wang Yajuan , Chi Feng , Xie Dehuan , Zhou Meijuan 
Published: March 2024

BACKGROUND: The study aimed to investigate anatomical changes in the neck region and evaluate their impact on dose distribution in patients with nasopharyngeal carcinoma (NPC) undergoing intensity modulated radiation therapy (IMRT). Additionally, the study sought to determine the optimal time for replanning during the course of treatment. METHODS: Twenty patients diagnosed with NPC underwent IMRT, with weekly pretreatment kV fan beam computed tomography (FBCT) scans in the treatment room. Metastasized lymph nodes in the neck region and organs at risk (OARs) were redelineation using the images from the FBCT scans. Subsequently, the original treatment plan (PLAN0) was replicated to each FBCT scan to generate new plans labeled as PLAN 1–6. The dose-volume histograms (DVH) of the new plans and the original plan were compared. One-way repeated measure ANOVA was utilized to establish threshold(s) at various time points. The presence of such threshold(s) would signify significant change(s), suggesting the need for replanning. RESULTS: Progressive volume reductions were observed over time in the neck region, the gross target volume for metastatic lymph nodes (GTVnd), as well as the submandibular glands and parotids. Compared to PLAN0, the mean dose (Dmean) of GTVnd-L significantly increased in PLAN5, while the minimum dose covering 95% of the volume (D95%) of PGTVnd-L showed a significant decrease from PLAN3 to PLAN6. Similarly, the Dmean of GTVnd-R significantly increased from PLAN4 to PLAN6, whereas the D95% of PGTVnd-R exhibited a significant decrease during the same period. Furthermore, the dose of bilateral parotid glands, bilateral submandibular glands, brainstem and spinal cord was gradually increased in the middle and late period of treatment. CONCLUSION: Significant anatomical and dosimetric changes were noted in both the target volumes and OARs. Considering the thresholds identified, it is imperative to undertake replanning at approximately 20 fractions. This measure ensures the delivery of adequate doses to target volumes while mitigating the risk of overdosing on OARs.
COMPARATIVE MORPHOLOGY AND IDENTIFICATION OF EGG CAPSULES OF SKATE SPECIES OF THE GENERA Atlantoraja MENNI, 1972, Rioraja WHITLEY, 1939 AND Sympterygia MÜLLER & HENLE, 1837
Authors: Oddone María Cristina , Vooren Carolus Maria 
Published: March 2024

A comparative study of the morphology of the egg capsule for six species of skates endemic to the southwestern Atlantic Ocean was carried out through literature review and analysis of new data. Egg capsules of Sympterygia acuta and S. bonapartii differ from those of genera Atlantoraja and Rioraja by their elongated, tendril-like posterior horns and their flat lateral margins. Egg capsules of the twoSympterygia species that occurring in the area in question differ from each other in size. In lateral view the egg capsule of Rioraja agassizi has convex ventral and dorsal faces, whereas in the three species of Atlantorajathe ventral face is flat. Within the genus Atlantoraja the most important taxonomical features for the identification of the capsules are the surface texture, the morphology of the velum and the capsule dimensions.The presence and location of attachment fibres is also an important character for capsules identification. Based on the aforementioned identification characteristics, a key to species for egg capsules of the six species is presented.
FAUNA DE ELASMOBRÂNQUOS DO ESTUÁRIO DO RIO CURU, CEARÁ, BRASIL
Authors: Basílio Thiago Holanda , Faria Vicente Vieira , Neto Manuel Antonio de Andrade Furtado 
Published: March 2024

Os estuários possuem relevante interatividade ecológica com ecossistemas vizinhos, sendo habitat de relativamente elevada diversidade de espécies. Poucos são os estudos que citam a ocorrência de elasmobrânquios nos estuários do Ceará. O objetivo principal deste trabalho foi caracterizar a fauna de elasmobrânquios do estuário do rio Curu. Entre setembro de 2004 e dezembro de 2007, pescarias artesanais realizadas no estuário foram mensalmente monitoradas. Foi registrada a ocorrência de seis espécies: Rhizoprionodon porosus (n=4), Carcharhinus limbatus (n=2),Dasyatis guttata (n=130), D. marianae (n=6),Gymnura micrura (n=8) e Aetobatus narinari(relato etnoecológico). A partir destes resultados, o número de espécies de elasmobrânquios registradas para o estuário do rio Curu triplicou (de duas para seis espécies), sendo que para os estuários do Estado, aumentou em 50% (de seis para nove espécies). A quase totalidade dos animais coletados correspondia a neonatos. O estuário do rio Curu atende pelo menos parcialmente a um dos três critérios que definem uma área de berçário. A confirmação desse status depende de pesquisas adicionais.
CARTILAGINOUS FISHES (CLASS CHONDRICHTHYES) OFF CEARÁ STATE, BRAZIL, WESTERN EQUATORIAL ATLANTIC - AN UPDATE
Authors: Queiroz Bruno Jucá , Neto Jones Santander , De Medeiros Ricardo Silveira , Nascimento Francisco C. P. , Neto Manuel Antonio de Andrade Furtado , Faria Vicente Vieira , Rincon Getulio 
Published: March 2024

Aproximadamente 1.100 espécies de Chondrichthyes (tubarões, raias e quimeras) são hoje conhecidas mundialmente. O inventário faunístico mais recente para águas brasileiras compilou a ocorrência de 160 espécies de elasmobrânquios (tubarões e raias). Entretanto, o conhecimento pleno da riqueza de espécies de Chondrichthyes no Brasil ainda está longe de ser alcançada porque faltam pesquisas no campo de inventários faunísticos. Isto se deve à falta de recursos para pesquisa e conservação. Os peixes cartilaginosos não recebem prioridade de financiamento de pesquisa porque geralmente não são alvo direto de pescarias. Até o presente momento, sabe-se que 50 espécies de elasmobrânquios ocorrem em águas ao largo do Estado do Ceará. O objetivo do presente estudo foi de atualizar o registro de ocorrência de peixes cartilaginosos ao largo do Ceará. Os novos registros foram obtidos durante monitoramento a bordo de pescarias industriais, bem como do monitoramento de desembarque de pescarias industriais e artesanais e um cruzeiro de pesquisas.Este esforço foi complementado com examinação de espécimens de uma coleção ictiológica local, registros de literatura e fotográficos. Os oito novos registros são:Cirrhigaleus asper, Breviraja cf. spinosa, Dipturussp., Dasyatis geijskesi ,Himantura cf. schmardae,Manta birostris, Mobula thurstoni e Hydrolagussp. Além disto, obteve-se também informação sobre a ocorrência Rhinobatos lentiginosus no Estado. Esses novos registros representam um aumento de 18% no número de registros de peixes cartilaginosos parao Estado, que agora somam 59 espécies
Сызыктық объектілердің ортофотопланьң кұру үшін zala 421 -16 е пилотсыз ұшу аппаратынын пайдаланылуы
Authors: Отжанов Т.К Отжанов Т.К , Жупархан Б. Жупархан Б. 
Published: March 2024

Сызыктық объектілердің ортофотопланьң кұру үшін zala 421 -16 е пилотсыз ұшу аппаратынын пайдаланылуы