bluuebunny/crossref_metadata_2025_split huggingface dataset:
Developing the Tissue Engineered Heart Valve – a Descriptive Hemodynamic and Ultrasound in Vitro Characterization Study of Heart Valves in a Bioreactor
Authors: Movileanu Ionela , Nistor Dan Octavian , Sierad Leslie , Brinzaniuc Klara , Oprita Codrut , Harpa Marius Mihai , Preda Terezia , Cotoi Ovidiu , Hussein Hussam AL , Hussein Hamida AL , Chertes Alexandru , Suciu Horatiu , Simionescu Agneta , Simionescu Dan 
Published: October 2021

Abstract
The inherent limitations of current heart valve substitutes create the premise for the Tissue Engineered Heart Valve (TEHV), considered the perfect substitute. We aimed to compare in vitro hemodynamic performances of our TEHV, the conventional prosthetic valve and similar porcine valves, by ultrasonography and geometry resulting in six valve models analysis. In a bioreactor, pulmonary and aortic physiology were replicated thus hemodynamic characteristics were tested. Using ultrasound, transvalvular pressure gradients and flow were measured and used to calculate their valvular functional area (VFA) and using a high-speed camera, the geometric peak opening area (GOA) was assessed. The obtained results were normalized to the diameter of the biological prosthesis in order to increase the measurement's accuracy. The ultrasound revealed normal function of all valves and physiologic transvalvular pressure gradients. The TEHV scaffold revealed absence of laceration or dehiscence, and performances in accordance with the control prostheses. The GOA was facile to obtain and the normalized values proved to be greater than the calculated functional area in all analyzed cases and the peak opening areas resulted lesser for the aortic conditions for all six used valves prototypes. To our knowledge, this is the first study to use bioreactors, for in vitro evaluation of heart valves.
Serial Drawing
Authors: Graham Joe 
Published: October 2021

Serial Drawing offers a timely and rigorous exploration of a relatively little-researched art form. Serial drawings – artworks that are presented as singular works but are made up of distributed parts – are studied in fresh, contemporary terms with a novel philosophical approach, emphasizing both the way in which this unique form of visual art exists in the world, and how it is encountered by the beholder.
Inspired by the quadruple framework of Graham Harman’s object-oriented ontology, Joe Graham explores a variety of serial drawings according to the idea that, in being serially arrayed, such artworks constitute a rather particular form of art object: one which is both unified yet pluralised, visible yet withdrawn. Examining works by artists such as Alexei Jawlensky, Ellsworth Kelly, Hanne Darboven, Jill Baroff and Stefana McClure, Graham interrogates the manner in which serial drawings are able to be appreciated by the viewer who beholds them in object-oriented terms. This task is carried out by paying attention to the manner in which three tensions – space, time and seriality – emerge for consideration within the beholder’s performative encounter with the work: an encounter which is ‘seen serially’, and which the medium of drawing specifically directs their attention towards.
Meningkatkan Hasil Belajar Siswa Menggunakan Model Pembelajaran Make A Match Pada Pelajaran IPA Materi Sifat-Sifat Cahaya Di Kelas V SD Negeri 060952 Medan Labuhan T.P. 2019/2020
Authors: Johannes Johannes 
Published: October 2021

Penelitian ini dilatar belakangi oleh model pembelajaran yang digunakan guru tidak sesuai dengan materi pelajaran sehingga menyebabkan rendahnya minat belajar hasil belajar siswa. Pelaksanaan penelitian ini bertujuan untuk mendeskripsikan peningkatan hasil belajar belajar siswa dengan menggunakan strategi pembelajaran make a macth pada mata pelajaran IPA materi Sifat-Sifat Cahaya kelas V SD Negeri 060952 Medan Labuhan. Jenis penelitian ini adalah penelitian tindakan kelas yang terdiri dari siklus perbaikan pembelajaran. Sebagai subjek penelitian ditetapkan sebanyak 30 siswa yang berasal dari siswa kelas V SD Negeri 060952 Medan Labuhan. Kegiatan penelitian dilakukan pada saat pembelajaran IPA berlangsung dengan materi Sifat-Sifat Cahaya. Untuk memperoleh data yang dibutuhkan untuk penelitian ini menggunakan instrumen test hasil belajar siswa dan kegiatan observasi. Berdasarkan hasil penelitian maka dapat dikemukakan kesimpulan bahwa dengan menggunakan model make a macth aktivitas pembelajaran semangkin meningkat, siswa belajar lebih aktif, pembelajaran berpusat pada guru sehingga dapat meningkatkan hasil belajar siswa IPA siswa materi Sifat-Sifat Cahaya di kelas V SD Negeri 060952 Medan Labuhan.
Penerapan Metode Outbond Pada Sekolah Alam Untuk Menciptakan Pembentukan Leadership
Authors: Setiawati Nanda Ayu 
Published: October 2021

Pelaksanaan belajar mengajar memiliki ketrkaitannya dengan tiga ranah perkembangan, yaitu ranah kognitif, ranah afektif dan ranah psikomotorik. Metode outbound merupakan melatih perkembangan psikomotorik peserta didik. Selain itu, dapat mengembangkan kemampuannya dan melihat peserta didik lainnya dalam menghadapi tantangan yang besar sekalipun. Metode outbound selalu memperturutkan permainan yang besifat riang bagi peserta didik, menuntut eserta didik berpikir secara logis, serta menantang yang membutuhkan keberanian peserta didik untuk melakukannya. Penelitian yang dilakukan bertujuan untuk memperoleh gambaran tentang pelaksanaan metode outbond di School of Univere. Teknik pengumpulan data, antara lain: :wawancara, observasi , serta dokumentasi. Analisis data penelitian ini menggunakan model interaktif Miles dan Huberman, adapun langkah-langkah yang ditempuh seperti data reduction, penyajian data, kesimpulan/verifikasi. Metode outbond ini dianjurkan dapat diterapkan di sekolah konvensional, dengan cara mengakolaborasi kurikulum dan model pembelajaran khas School of Universe. Metode outbond berupaya melatih sikap tunggang hati peserta didik, mampu bekerjasama dengan kelompok yang merupakan bagian dari karakter leadership
Ditadura, repressão e resistência: memórias de um militante polí­tico
Authors: Hebling Milene Cristina 
Published: October 2021

Luiz Marcos de Magalhães Gomes foi um importante militante polí­tico durante o regime militar no Brasil. Devido í sua grande participação no movimento estudantil e na organização chamada Ação Popular, ele atraiu para si a atenção de órgãos repressores, tendo sido preso por motivos polí­ticos. Sua entrevista fornece elementos importantes para a compreensão dos movimentos de resistência í ditadura e da repressão organizada pelo governo.
Território de afetos: práticas femininas antirracistas nos quilombos contemporâneos do Rio de Janeiro
Authors: Almeida Mariléa 
Published: October 2021

A visibilidade atual das mulheres quilombolas é o ponto de partida deste artigo que pergunta sobre os modos femininos de fazer política, especialmente a dimensão antirracista dessas ações. O recorte temporal parte do final de 1980, quando foi criado o direito territorial para as comunidades remanescentes de quilombo. O trabalho focaliza práticas de quilombolas do Rio de Janeiro que, ao transmitirem saberes, fortalecem os laços entre as pessoas e os territórios onde vivem. Essas ações, compreendidas como territórios de afetos, ampliam espaços de subjetivação por meio dos deslocamentos de sentimentos provocados pelos dispositivos racistas, sexistas e classistas que incidem sobre seus corpos e territórios.
Naar een adequate aanpak van naastplaatsingen
Authors: de Vries Chris , Epskamp Martijn , van Ostaaijen Julien 
Published: October 2021

Towards an adequate approach for overflowing garbage containers
Litter in the street is a great annoyance for many people, especially in the large cities. This includes overflowing garbage containers caused by people incorrectly placing garbage: next to these containers. In this study, carried out in the municipality of Rotterdam, we have developed a model that provides insight into which factors contribute to where this is done (or not). In summary, days when people are not working, the number of people that depend on the container(s), the bonding and social cohesion of that group, and the social-economic circumstances of the people in that group are the most important factors in determining at which container locations people incorrectly place their garbage. These insights provide starting points for an effective municipal approach to overflowing garbage containers and thereby reducing the residents’ feelings of nuisance and unsafety.
Risicoprofiling of risicovolle profiling tijdens grenscontroles?
Authors: Van der Auwera Jop , Van de Velde Lore 
Published: October 2021

Risk profiling or risky profiling during border controls? Towards a responsible use of proactive risk profiles by law enforcement authorities
Although risk profiling can by no means be considered as a ‘new’ crime prevention tool, its application has gained popularity over the years. Both in the screening of asylum seekers, in border control at airports (e.g. behavioural profiling or the use of risk profiles in the European Passenger Information Unit) and in the designation of hotspots at the local level (e.g. the Crime Anticipation System), attempts are now being made to identify persons with criminal intentions more often on the basis of ordinal risk assessment tools. This sudden increase in popularity is not remarkable, since random police patrols or undirected security checks have long been shown to have negligible impact on crime reduction. Risk profiles, on the other hand, have a certain potential for shaping more effectively the interventions by law enforcement authorities at border crossing points. Nevertheless, the use of such profiles also raises some pertinent questions. It is precisely in the light of this ambivalence that the present theoretical contribution will consider the pitfalls and success factors of risk profiling during border checks, in order to determine when one can speak of ‘risk profiling’ and when the concept of ‘risky profiling’ must be used.
Mechanical systems of precise robots with vibrodrives, the vibrating mass of the exciting force of which performs impacts into deformable support and direction of the exciting force coincides with the line of relative motion of the system
Authors: Ragulskis Kazimieras 
Published: October 2021

Manipulator consisting from one sided self stopping mechanism and two masses which interact through an elastic – dissipative member is investigated. The drive of the manipulator is the generator of mechanical vibrations. With such elements the system is nonlinear. A separate case is investigated when static positions of equilibrium of both masses are located in one point. Because of this spectrums of eigenfrequencies are linear and infinite. All those facts mean that the operation of the manipulator is optimal.
Fast development of robots gives rise to the investigations of increasing intensity creating various types of robots especially in the area of high precision. Mechanical systems of robot must perform laws and trajectories of motion, positioning in space with highest possible precision as well as ensure dynamicity of highest possible stability. Those aims are achieved in the presented paper by creating a structure of the best design, based on vibroimpacts as well as by choosing corresponding nonlinear parameters of the system. The investigation is performed by analytical – numerical method. The obtained results enable to create mechanical systems for precise robots.
Prevalence of non-specific chronic low-back pain and risk factors among male soldiers in Saudi Arabia
Authors: Sidiq Mohammad , Alenazi Wadha , Kashoo Faizan Z. , Qasim Mohammad , Lopez Marisia Paz , Ahmad Mehrunnisha , Mani Suresh , Shaphe Mohammad Abu , Khodairi Omaymah , Almutairi Abdulqader , Mir Shabir Ahmad 
Published: October 2021

BackgroundNon-specific chronic low back pain (NSCLBP) is the most common musculoskeletal disorder affecting health and work among the military population. NSCLBP is a complex disorder with several risk factors contributing to its occurrence. Therefore, the objective of our study was to estimate the prevalence and contribution of risk factors towards NSCLBP among male soldiers in Saudi Arabia.MethodsA cross-sectional study was conducted from March 2020 to January 2021 among the military personnel at Hafar Al-Batin military base, Saudi Arabia. The entire population (n = 62, 000) at the military base were invited to participate in the study. The participants were invited to participate in the study either through direct referral from in-patient and out-patient departments of the military hospital or by invitation through pamphlets, email, and advertisement across the offices and residential areas. Soldiers reporting lower back pain for at least 12 weeks were screened for inclusion criteria at the physical therapy department of the military hospital. Inclusion criteria included pain or discomfort originating from the lower back without any known spinal diseases. Participants with a systemic inflammatory disorder, trauma, neurological symptoms, and recent spinal surgery were excluded. All eligible participants were assessed for demographic variables and risk factors and complete the Rolland Morris Disability Questionnaire and WHO-Five Well-Being Index.ResultsThis study identified a 46.3% prevalence of pain originating from the spine with a 2.7% prevalence of NSCLBP. Spearman’s rho correlation between the severity of disability due to NSCLBP was strongly associated with age (rs= 0.834,p < 0.01), quality of sleep (rs= 0.790,p < 0.01), body mass index (BMI) (rs= 0.617,p < 0.01), smoking (rs= 0.520,p < 0.01), co-morbidity (rs= 0.357,p < 0.01), but not with the level of physical activity (rs= 0.044,p = 0.07).ConclusionThere was a high prevalence of pain originating from the spine among male Saudi soldiers with a relatively low prevalence of NSCLBP. However, the prevalence of disability due to NSCLBP was strongly associated with age, sleep quality, BMI, smoking habit, and co-morbidity.
A study on Economic Analysis of Organic Coconut Cultivation in Coimbatore District
Authors: Parthiban J. J. , Anjugam M. 
Published: October 2021

The study analyses the economics of coconut production under organic farming in Coimbatore District of Tamil Nadu. Participatory Guarantee Scheme (PGS) was studied in accordance to how farmers get their organic farming certification under PKVY scheme in Tamil Nadu. The estimated variable cost was Rs. 43,025/ha. The total cost of cultivation was Rs.82,216/ha. The net income over operational cost was Rs.2,95,888/ha and net income over total cost was Rs.2,56,697/ha. Total yield was increasingly responsive with higher application of farm yard manure and bio- fertilizers. Results of scale efficiency shows majority of the farms were operating in optimum return to scale. Inadequate supply of labour and inadequate market for organic products poses as major constraints to organic coconut farming in the area of study.
Aim: The purpose of the study was to find out the profitability level and responsiveness of yield with input application of organic farming through Participatory Guarantee Scheme (PGS) and how farmers actively involved in organic farming to conserve natural resources.
Design of Study and Methodology: The study was conducted in Coimbatore district of Tamil Nadu (2020) with 60 sample respondents. Purposive sampling was adopted for the study and two blocks were selected based on the leading operator of PGS scheme. The data were collected through well-structured interview schedule which was prepared through pre-tested survey. The analytical methods followed in the study included cost and returns estimation, resource use efficiency and data envelopment analysis to reveal the exact scenario of organic farming practices.
Findings of the study:
The study showed about

Organic coconut is found to be one of the most important and sustainable crop options.
Estimates of Resource Use Efficiency show that coconut yield was relatively higher with use of farm yard manure and bio- fertilizers, compared to all other organic inputs
Nearly, 32.5 per cent of the farms considered under study were found to be operating in constant returns to scale.
The major marketing constraint faced by the sample farmers through organic farming was inadequate supply of labour and price fluctuations of coconut.
Academic Stress and Coping Strategies among Postgraduate Students: Comparative Study of Universities in Imo State, Nigeria
Authors: Ezelote J. C. , Eleanor Asuzu , Judith Obi , Joy Mbachu 
Published: October 2021

Aims: The study aimed to identify and compare the prevalence of stress among postgraduate students in Imo State University (IMSU)and Federal University of Technology, Owerri(FUTO)using General Health Questionnaire-12 (GHQ-12), to identify and compare their sources of academic stress using Postgraduate Stressor Questionnaire(PSQ); and to identify and compare the measures the students were using to cope with stress using Cope inventory.
Sample: All the postgraduate students admitted in 2015/2016 session in FUTO and IMSU were sampled for this study, with 10% and 8% attrition rates in IMSU and FUTO respectively.
Study Design: This is a comparative cross sectional study between the postgraduate students in IMSU and FUTO.
Place and Duration of Study: Imo State University (IMSU) and Federal University of Technology, Owerri (FUTO), between August 2017 to November 2017.
Methodology: All the postgraduate students admitted in 2015/2016 session in FUTO and IMSU were used for this study (121 were from IMSU while 832 were from FUTO). PSQ, GHQ-12 and COPE Inventory were for data collection used to collect data. Chi square was used to test the hypotheses and the significance level was p≤0.05.
Results: It was observed that 79% of FUTO students were under eustress while 36% of those at IMSU were under eustress. Majority (80%) of FUTO respondents were using positive coping strategies compared to 36% of IMSU students using positive coping strategies. There was significant difference in the prevalence of stress and coping strategies among the students in the two universities (<0.001*).
Conclusion: Academic stress leads to many physiological and mental illnesses. It results from the stressful situations that persist over time and produces negative health outcomes. Postgraduate students in Nigeria face a number of pressures that are distinct from the stresses that undergraduates face. If it is not managed with positive coping strategies it will leads to wearing effects on people.
Prevalence and Associated Risk Factors of Hypertension among Adults (40 Years and Above) in the Tano North District of the Ahafo Region, Ghana
Authors: Sumaila Issah , Asumah Mubarick Nungbaso , Dassah Rosaline Bierema 
Published: October 2021

Introduction: Increased prevalence of hypertension (HTN) has been attributed to commonly known risk factors such as obesity, low level of nutritional knowledge, lack of exercise, alcohol intake, and tobacco use.
Objective: The objective of this study is to determine the prevalence, and associated risk factors of hypertension among residents of the Yamfo community in the Ahafo Region of Ghana.
Methods: A community-based cross-sectional study of 174 participants aged ≥40 years were enrolled using simple random sampling. A structured questionnaire was used to elicit information on sociodemographic characteristics, behavioural/lifestyle risk factors and knowledge of hypertension. Data was analysed using SPSS version 23.
Results: Prevalence of hypertension was 63.2% (95% CI: 55.7–70.1) in adults 40 years and above. Risk factors that were significantly associated with hypertension were lack of physical activity (p=0.030), alcohol consumption (p=0.001), consumption of meals prepared with oil (p=0.016), reduced frequency of fruit consumption (p=0.008) and reduced frequency of vegetable consumption (p<0.001). Increasing age (aOR,1.9; 95%CI (1.3-2.4); p=.049), physical activity (cOR,2.12, 95% CI (1.07-4.21), p=.032), alcohol consumption (aOR, 57.03; 95% C1 (4.48-726.59); p=.002), and knowledge on the cause of hypeternsion (aOR, 3.41; 95% CI (1.93-5.17); p=.032) were observed as determinants of hypertension.
Conclusion: Majority of the study participants were hypertensive, with the majority of them having knowledge on risk factors of hypertension. Majority of participants had the opinion that hypertension is inevitable, because it comes with old age. Enough (Intensive) education concerning hypertension could be extended to the community, about the different, but equally relevant risk factors of hypertension, such as smoking, alcohol consumption, reduced fruit and vegetable consumption and inappropriate diet. This could be achieved by organizing outreach programs by the community health workers in places like markets and churches in order to remit the elderly that they can still be healthy in old age, and at schools and on social media to inculcate positive health behavior in the youth.
Egyptian Mathematics Disclosure
Authors: Denis Olivier 
Published: October 2021

Some fundamental mathematical researches have been carried out about mathematical certainties based on ancient Egyptian mathematical sources and their problems following ancient Egyptian Wisdom set of knowledge building the new scientific paradigm following the rediscovery of the true value of PI and following the new approach of Global Dimensional Mathematics [1].
Some fundamental mathematical researches on the foundations of Egyptian mathematics covering the mathematical problem of The Akhmin wooden tablets [2], the tenth and the fourteenth problem of The Moscow Mathematical Papyrus [3] as well as the forty-first and fiftieth problem from The Rhind Mathematical Papyrus [3] have been carried out, without forgotten, the resolution of the fundamental question of the quadrature of the circle which is now effective.
In the disclosure of Egyptian mathematics, the new approach to fundamental mathematical notions is established, adding the cornerstone to building the core of the new approach to Egyptian mathematics, mathematics and science in general.
The Egyptian mathematics disclosure solves, following the Egyptian approach to mathematics and following ancient Egyptian Wisdom set of knowledge, unsolved ancient Egyptian mathematical problems, such as finding the complete solution and decoding the glyph of the eye of Horus, as well as the problem of the truncated pyramid which has found a solution like the half basket problem found one. The question of the quadrature of the circle shatters the mathematical conceptions with all the consequences that we can only begin to understand.
The Egyptian mathematics disclosure forms the basis for building the new scientific approach based on ancestral Egyptian mathematical problems, the true rediscovered value of PI and the new original Global Dimensional Mathematics opening up a still unknown perspective on the world of science in general.