bluuebunny/crossref_metadata_2025 huggingface dataset:
Determining the optimal duration of plyometric training for enhancing vertical jump performance: a systematic review and meta-analysis
Authors: Kumar Deepak , Dhull Sandeep , Nara Kuldeep , Kumar Parveen
Published: September 2023

Introduction. Plyometric training is done in many ways, but countermovement jumps and squat jumps are easy and safe methods involving minimal use of equipment to increase lower body muscular power. There is enough evidence in the literature to support the notion that plyometric training increases vertical jump height. But the combination of countermovement jumps and squat jumps and its impact on vertical jump height is still unclear.

Purpose. Therefore, to examine the importance of various plyometric training techniques, this meta-analytical evaluation was created. 

Materials and Methods: PubMed, MEDLINE, and Google Scholar databases were searched through August 2022. Empirical studies are expressed in the English language and issued within the last twenty-eight years. Included squat jump and countermovement jump interventions for improving vertical jump height. The studies used a training duration of a minimum of four weeks or above involving a control group included. As an approach to plyometric training that raises vertical jump height, the effects of countermovement jump and squat jump training were evaluated. To assess the level of heterogeneity, the I2 statistics were utilized. The value of I2 above 75% indicates significant heterogeneity and leads to the subgroup analysis method. Summary effects were calculated using standardized mean difference. With the help of the Cochrane tool, the risk of bias was assessed.

Results: The 22 study results all met the enclosure criteria. The meta-analysis indicated that the total impact of squat jumps training had high effects on vertical jump height [Effect Size = 0.96, (95% CI,0.57 to 1.35)]. A moderate degree [Effect Size = 0.91, (95 % CI,0.46 to 1.37)] of effects of countermovement jumps training on vertical jump height was reported by included interventions. Lesser than 10 weeks of plyometric training intervention duration they probably had a small effect on countermovement jumps [Effect Size = 0.79, (95 % CI, 0.30 to 1.29)].

Conclusion: Squat jumps and countermovement jumps are an efficient kind of training to increase the vertical jump height of male and female athletes, according to our study on plyometric training. Higher posttests mean differences were found in the studies including male subjects. The length of intervention has proportional effects on vertical jump height the recommended length of training should lie between 8 to 12 weeks. The effect size ranged between small to large degrees was observed in overall and subgroup analysis.
The Impact of Applying Deming's Model on Institutional Performance in Air Navigation: A Study on Quality and Customer Satisfaction
Authors:   University of Akron, Projects Specialist, Kuwait., Alfooderi Sulaiman
Published: September 2023

This study investigates the influence of applying Deming's model on the institutional performance of air navigation, with a specific focus on the concept of quality and its alignment with the present and future needs and expectations of customers. The research was conducted within the Department of Air Traffic in Kuwait, specifically within the Air Navigation Services Company, utilizing a sample of 206 employees. To achieve its objectives, the researcher developed a questionnaire as the primary research tool, designed to assess the relationship between the application of the Deming model and institutional performance. The study reveals several significant findings. Firstly, there exists a statistically significant relationship at a significance level of α≤0.05 between the practices of the Deming model and the promotion of administrative innovation within the Air Navigation Company in Kuwait. Additionally, the research demonstrates a statistically significant effect at the α≤0.05 level of Deming model practices on internal institutional innovation. Moreover, a similar statistically significant effect at α≤0.05 was observed for Deming Model Management practices on creating value within the Air Navigation Company in Kuwait. Among the key recommendations arising from this study is the importance of assessing the quality of air navigation services from the perspective of customers, particularly in light of the application of the Deming model. Understanding customer perceptions and expectations can play a pivotal role in further enhancing the quality and effectiveness of air navigation services. This research contributes valuable insights into the application of Deming's model in the context of air navigation, shedding light on its potential benefits in terms of innovation, quality, and value creation.
Bilateral axillary aneurysm repair by open surgery: A case report
Authors: Távara Laura Isabel Inga , Corte Giuseppe , Manteca Jorge Bartolomé Cuenca
Published: September 2023

Axillary aneurysms are rare pathologies and although most of them are the result of traumatic events, there is a percentage that is due to atherosclerotic disease or is the result of a degenerative process over time. Once the aneurysm develops, it can cause distal ischemic events and/or neurological symptoms related to embolism or compression. Therefore, the diagnosis and treatment of axillary aneurysms is crucial for the patient. Most of them can be treated effectively by surgical excision and vascular grafting. We present a case of a patient with bilateral axillary aneurysms diagnosed after embolic complications
A NECESSIDADE DA CLT PROTEGER OS JOGADORES ELETRÔNICOS PROFISSIONAIS NOS E-SPORTS
Authors: Ferreira Rosa Angélica , Zanini de Sá Duarte Nunes Taís , Gabriel Viríssimo da Silva Hugo
Published: September 2023

O presente estudo teve como necessário principal proporção a necessidade de necessário pela CLT dos contratos de trabalho de jogadores eletrônicos profissionais. Simultaneamente, pretende-se compreender e corroborar o trabalho como um direito humano e fundamentalmente inerente a todas as pessoas; analisando sistematicamente o eSports e o projeto de lei brasileiro, reputando sua real necessidade de exigir trabalhista. Tratou-se de uma Pesquisa Bibliográfica e Documental, de caráter qualitativo, respeitando as regulamentações éticas que regem as investigações científicas no campo jurídico brasileiro.Os resultados mostram que não se pode ignorar o avanço dessa indústria, principalmente durante a pandemia global de 2020, sendo uma única atividade de entretenimento e esporte que nunca foi suspensa, mas aumentou em termos de número de torneios, competições e jogadores. É por isso que devemos proclamar que deve ser regulamentado o mais rapidamente possível.
RIGHT TO TRUTH AS A RIGHT TO MEMORY
Authors: Faza da Silveira Fernandes Geovana , De Souza Salles Sergio , Núnez Nascimento Lopes Salles Denise Mercedes
Published: September 2023

In the discourse of international law, the right to truth emerges as a new legal concept to mobilize a diversity of agendas and interests. The present study seeks to interpret the right to the truth as a right to memory from the analysis of the sentence of condemnation of Brazil by the Inter-American Court of Human Rights in the Gomes Lund et al. Case (“Araguaia Guerrilla”). As an exemplary case of petition before the Inter-American Court of Human Rights, it is sought to demonstrate that the persistent ignorance of the truth amounts to forced institutional amnesia and the persistence of crimes of forgetfulness which seek to erase the traces of past violence against the dignity of human person.
OPPORTUNITIES AND CHALLENGES OF DIGITAL TRANSFORMATION IN EDUCATION IN THE COVID DISASTER IN VIETNAM
Authors: The Vinh Luu , Thi Thu Huong Pham
Published: September 2023

Coronavirus affects the education system in the world. Schools, colleges, and universities are closed to control the spread of the coronavirus. School closure brings difficulties for students, teachers, and parents. So, online learning is a solution to continue the education system. However, the lack of network infrastructures, computers, and internet access is challenging. This paper aims to review the impact of the COVID-19 pandemic on the education and status of digital transformation in education in Vietnam. Verify the opportunities and challenges in the digital transformation in education and recommend some issues that need to do be concerned to promote the transformation process in education in Vietnam.
Penyuluhan Tentang Teknik Menyusui Pada Ibu Menyusui Di Wilayah Kerja Puskesmas Kawatuna Palu
Authors: Arini Arini , Octaviana Iin , Masfufah Masfufah
Published: September 2023

Menyusui adalah proses memberikan makanan pada bayi dengan menggunakan air susu ibu langsung dari payudara ibu. Salah satu kandungan dari ASI yaitu mengandung zat infeksi, bayi akan terlindungi dari berbagai macam infeksi, baik yang disebabkan oleh bakteri, virus, jamur atau parasit. Teknik menyusui adalah suatu cara pemberian ASI yang dilakukan seorang ibu kepada bayi, demi mencukupi kebutuhan nutrisi bayinya. Teknik menyusui ialah cara membrikan ASI untuk bayi dengan mendekatkan posisi tubuh ibu dan bayi dengan benar. Untuk mencapai keberhasilan menyusui diperlukanpengetahuan mengenai teknik menyusui. Banyak para ibu yang tidak mengetahui teknik menyusui yang benar mengalami masalah terutama lecet pada puting, ASI tidak lancar keluar, bayi tidak mau menyusui, sehingga para ibu mengalami kesulitan. Diharapakan dengan adanya penyuluhan mengenai teknik menyusui dapat membantu para ibu dalam mengatasi masalah menyusui. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberikan informasi kepada ibu menyusui tentang tentang posisi menyusui. Metode yang digunakan dalam program pengabdian masyarakat ini adalah penyuluhan dan pendampingan yang ditujukan kepada masyarakat terutama ibu menyusui. Metode penyuluhan dan pendampingan ditujukan untuk meningkatkan pemahaman para ibu menyusui.
Internalization Of Humanistic Values In The Learning Process For The Millennial Generation
Authors: Nurlaelah Nurlaelah
Published: September 2023

In this era of globalization, Science and Technology (S&T) have become incredibly popular in daily life. S&T has brought people closer together and made the world more transparent. This situation poses a dilemma stemming from the remarkable progress of S&T. On one hand, this progress has made life more convenient for humans. On the other hand, our conscience raises concerns as we find ourselves in a situation that is no longer human-centric but rather technocentric. The millennial generation, born between the 1980s and the 2000s, is deeply intertwined with technological advancements, hence the term "millennial." They have experienced and actively participated in the development of technology. The millennials are the intelligent successors of the nation, continuously engaging with positive technological advancements. They possess positive attributes such as critical thinking, social media wisdom, creativity, and a desire to create harmonious relationships. However, they also exhibit negative traits such as communication difficulties, self-confidence issues, a sense of superiority, self-destructive tendencies, and a fear of job loss. One way to address the negative aspects observed in the millennial generation is through the internalization of humanistic values, particularly within the educational process at schools or in classrooms through humanistic education. Humanistic education as a whole provides a more comprehensive perspective, emphasizing an education that engages all dimensions and potential of humans, making individuals aware of their processes in becoming meaningful contributors to life, family, society, nation, and religion. The objective of this article is to describe the internalization of humanistic values in the millennial generation to counteract the potential negative aspects they might exhibit. The outcomes of this internalization are expected to shape millennials into intelligent, creative individuals who are human-centric in a techno-centric world
ESTIMATING SENSITIVE POPULATION PROPORTION USING A COMBINATION OF BINOMIAL AND
HYPERGEOMETRIC RANDOMIZED RESPONSES BY DIRECT AND INVERSE MECHANISM
Authors: Dihidar Kajal , Bhattacharya Manjima
Published: September 2023

For various reasons individuals in a sample survey may prefer not to confide to
the interviewer the correct answers to certain potentially sensitive questions such as
the illegal use of drugs, illegal earning, or incidence of acts of domestic violence,
etc. In such cases the individuals may elect not to reply at all or to reply with
incorrect answers. The resulting evasive answer bias is ordinarily difficult to assess.
The use of a randomized response method for estimating the proportion of individuals
possessing those sensitive attributes can potentially eliminate the bias. Following
Chaudhuri and Dihidar (2014) and Dihidar (2016), here, as a possible variant, we have
made an attempt to estimate the sensitive population proportion using a combination of
binomial and hypergeometric randomized responses by direct and inverse mechanism. Along
with the traditional simple random sampling, with and without replacement, we consider
here sampling of respondents by unequal probabilities. Essential theoretical derivations
for unbiased estimator, variance and variance estimators are presented for several
sampling schemes. A numerical illustration is performed to make a comparative study of
the relative efficiencies of the direct and inverse mechanism.
EXAMINING TESTS FOR COMPARING SURVIVAL CURVES WITH RIGHT CENSORED DATA
Authors: Karadeniz Pinar Gunel , Ercan Ilker
Published: September 2023

Background and objective: In survival analysis, estimating the survival
probability of a population is important, but on the other hand, investigators want to
compare the survival experiences of different groups. In such cases, the differences can
be illustrated by drawing survival curves, but this will only give a rough idea. Since
the data obtained from survival studies contains frequently censored observations some
specially designed tests are required in order to compare groups statistically in terms
of survival. Methods: In this study, Logrank, Gehan-Wilcoxon, Tarone-Ware, Peto-Peto,
Modified Peto-Peto tests and tests belonging to Fleming-Harrington test family with (p,
q) values; (1, 0), (0.5, 0.5), (1, 1), (0, 1) ve (0.5, 2) are examined by means of Type
I error rate obtained from a simulation study, which is conducted in the cases where the
event takes place with equal probability along the follow-up time. Results: As a result
of the simulation study, Type I error rate of Logrank test is equal or close to the
nominal value. Conclusions: When survival data were generated from lognormal and inverse
Gaussian distribution, Type I error rate of Gehan-Wilcoxon, TaroneWare, Peto-Peto,
Modified Peto-Peto and Fleming-Harrington (1,0) tests were close to the nominal
value.
Bayesian model averaging and jointness measures: theoretical framework and application to the gravity model of trade
Authors: Beck Krzysztof
Published: September 2023

The following study presents the idea of Bayesian model averaging (BMA), as well as the benefits coming from combining the knowledge obtained on the basis of analysis of different models. The BMA structure is described together with its most important statistics, g prior parameter proposals, prior model size distributions, and also the jointness measures proposed by Ley and Steel (2007), as well as Doppelhofer and Weeks (2009). The application of BMA is illustrated with the gravity model of trade, where determinants of trade are chosen from the list of nine different variables. The employment of BMA enabled the identification of four robust determinants: geographical distance, real GDP product, population product and real GDP per capita distance. At the same time applications of jointness measures reveal some rather surprising relationships between the variables, as well as demonstrate the superiority of Ley and Steel’s measure over the one introduced by Dopplehofer and Weeks.
An application of functional multivariate regression model to multiclass classification
Authors: Krzyśko Mirosław
Published: September 2023

In this paper, the scale response functional multivariate regression model is considered. By using the basis functions representation of functional predictors and regression coefficients, this model is rewritten as a multivariate regression model. This representation of the functional multivariate regression model is used for multiclass classification for multivariate functional data. Computational experiments performed on real labelled data sets demonstrate the effectiveness of the proposed method for classification for functional data.
Stacked regression with a generalization of the Moore-Penrose Pseudoinverse
Authors: Górecki Tomasz , Łuczak Maciej
Published: September 2023

In practice, it often happens that there are a number of classification methods. We are not able to clearly determine which method is optimal. We propose a combined method that allows us to consolidate information from multiple sources in a better classifier. Stacked regression (SR) is a method for forming linear combinations of different classifiers to give improved classification accuracy. The Moore-Penrose (MP) pseudoinverse is a general way to find the solution to a system of linear equations. This paper presents the use of a generalization of the MP pseudoinverse of a matrix in SR. However, for data sets with a greater number of features our exact method is computationally too slow to achieve good results: we propose a genetic approach to solve the problem. Experimental results on various real data sets demonstrate that the improvements are efficient and that this approach outperforms the classical SR method, providing a significant reduction in the mean classification error rate.
Subjective approach to assessing poverty in Poland – implications for social policy
Authors: Morawski Leszek , Domitrz Adrian
Published: September 2023

The poverty rates based on the OECD scales are frequently used in public debate. In this scale, large families are usually identified as those most in need of financial support. Poland is an interesting case for applying an alternative, subjective approach to calculating equivalent scales, as Poland has a large mean size for households, and is dependent on means-testing in social policymaking. The overall poverty rates for the two approaches are not distinctly different but they lead to significantly different distributions of poverty, as different types of households are considered in line with the result in Bishop et al. (2014) for the eurozone countries. The subjective approach suggests that one-person households, not large families, should be considered most at risk of material poverty. Futhermore, the relative positions of households in the income distributions also differ considerably. As a consequence, the current shape of social policy in Poland may need to be reconsidered in order to distribute public transfers more accurately.
Selecting the optimal multidimensional scaling procedure for metric data with R environment
Authors: Walesiak Marek , Dudek Andrzej
Published: September 2023

In multidimensional scaling (MDS) carried out on the basis of a metric data matrix (interval, ratio), the main decision problems relate to the selection of the method of normalization of the values of the variables, the selection of distance measure and the selection of MDS model. The article proposes a solution that allows choosing the optimal multidimensional scaling procedure according to the normalization methods, distance measures and MDS model applied. The study includes 18 normalization methods, 5 distance measures and 3 types of MDS models (ratio, interval and spline). It uses two criteria for selecting the optimal multidimensional scaling procedure: Kruskal’s Stress-1 fit measure and Hirschman-Herfindahl HHI index calculated based on Stress per point values. The results are illustrated by an empirical example.
Teacher Competency Development Through On-The-Job Training: A Case Study at SDIT Lan Tabur Purwodadi
Authors: Istiqomah Devi , Purwanto Nurtanio Agus
Published: September 2023

On-the-job training is practical if it suits the needs of the teacher. However, there still needs to be more competence and training in schools. This study aims to analyze teacher competency development through on-the-job training. This research uses a qualitative approach in the form of a case study at SDIT Lan Tabur Purwodadi. The data collection method uses observation, interviews, and documentation. The subjects in this study were principals and teachers. Data analysis techniques with data collection, data reduction, data presentation, conclusion, and data verification. The results showed that through on-the-job training, teacher competence could develop well, teacher pedagogic competence develops in managing learning in the classroom, and teacher social competence is also well developed and can provide a foundation for social problems in schools. Teacher personality competence develops with on-the-job training, but it is different from the professional competence of teachers, which is less developed due to the lack of teachers conducting research and the use of technology, which still needs to be improved. This is because the facilities and infrastructure at SDIT Lan Tabur Purwodadi need to be improved. Through on-the-job training, teacher competence becomes very developed. The implications of this research are expected through on-the-job training to develop teacher competence and provide solutions to teacher competence problems in schools.
Faktor-Faktor yang Berhubungan dengan Tingkat Stres pada Santri dan Santriwati Remaja di Pondok Pesantren Al-Ikhlas Negara
Authors: Rahmah Aulia , Agustini Meti , Darmayanti Darmayanti , Raya Mardha
Published: September 2023

Latar Belakang: Remaja merupakan masa peralihan dari anak ke dewasa yang memerlukan perhatian khusus untuk pencarian identitas diri, eksplorasi, dan eksperimentasi berbagai peran sosialnya. Masa remaja merupakan salah satu masa yang rentan terhadap kejadian stres. Stres merupakan perasaan ketidaksesuaian individu ketika berinteraksi dengan lingkungannya baik secara fisik, psikologis, maupun sosial. Kondisi stres ini juga bisa dirasakan oleh remaja yang menempuh pendidikan di Pondok Pesantren atau yang disebut dengan santri. Ada banyak faktor yang menyebabkan terjadinya stres baik itu faktor internal maupun eksternal.

Tujuan: Penelitian ini bertujuan untuk mengetahui faktor apa saja yang berhubungan dengan tingkat stres pada santri dan santriwati remaja di Pondok Pesantren Al-Ikhlas Negara.

Metode: Rancangan penelitian ini merupakan penelitian kuantitatif dengan jenis penelitian analitik menggunakan desain cross sectional. Sampel pada  penelitian ini adalah santri dan santriwati remaja yang berusia 15-20 tahun berjumlah 218 orang dengan teknik pengambilan sampel yaitu proportionate random sampling. Pengumpulan data dilakukan dengan menggunakan kuesioner yang telah dimodifikasi dan dianalisis menggunakan spearman rank.

Hasil: Penelitian ini diperoleh nilai p-value pada masing-masing variabel adalah <0,05 dengan kesimpulan faktor yang berhubungan dengan tingkat stres adalah kepribadian, stres akademik, lingkungan, dan support system.

Kesimpulan: Faktor yang berhubungan dengan tingkat stres pada santri dan santriwati perlu menjadi perhatian khusus bagi pihak pengelola Pondok Pesantren ke depannya.
Impact of financial condition index on inflation: the case of Vietnam
Authors:   Banking Academy of Vietnam, Phạm Thị Hoàng Anh , Nguyễn Nhật Minh
Published: September 2023

This paper investigates the impact of the financial condition index on inflation in Vietnam by using the Autoregressive- Distributed Lag Model (ARDL) combined with a time series dataset from January 2013 to December 2022. Research results show that loosening financial conditions will put pressure on inflation in the short term but not in the long term. In addition, the oil price and M2 money supply also have a positive impact on Vietnam’s inflation. On that basis, this paper also proposes policy recommendations to improve the effectiveness of monetary policy in Vietnam
El material didáctico: una estrategia para potenciar la conciencia ambiental de los educandos de ciencias experimentales.
Authors: Flores Hinostroza Elizeth Mayrene , Ruiz Serrano María del Cisne , Martínez Matute Evelyn Alexandra
Published: September 2023

Esta indagación tiene como propósito promover la construcción de recursos didácticos en el contexto de las ciencias experimentales, en pro del mejoramiento de la conciencia ambiental que conlleve a la disminución de los conflictos socioambiental para el fortalecimiento de un entorno más sano y sostenible. Este proyecto se ejecuta en la Universidad Nacional de Educación ubicada en el Cañar, Ecuador. A partir de la cosmovisión verde, este estudio se enfoca desde una investigación teórica documental desarrollando algunas actividades teóricas-prácticas que emergieron de las experiencias vivenciales de sus prácticas vinculación con la sociedad, en que los estudiantes realizaron material didáctico que contribuyó al aprendizaje de las ciencias desde otra perspectiva experimental necesaria en la enseñanza del bachillerato general ecuatoriano. Para obtener resultados se realizaron grupos focales, así como dos actividades centrales como el Reciclafest y la casa abierta que organizó la alcaldía de la comunidad de Azogues.
Citations and addressability
Authors: Eve Martin Paul
Published: September 2023

What is the point of a citation? As Anthony Grafton puts it in his history of the footnote, “the culturally contingent and eminently fallible footnote offers the only guarantee we have that statements about the past derive from identifiable sources. And that is the only ground we have to trust them” (233). So the point of a footnote/citation is to be able to lookup and check that epistemic claims are true? Sometimes.
Heinz Pampel über die neue Open-Access-Policy der USA: Ein „wegweisendes Memorandum“
Authors: Fischer Georg
Published: September 2023

Als führende Wissenschaftsnation dominiert die USA auch das Publikationswesen weltweit. Die neue Open-Access-Policy dürfte daher über die Vereinigten Staaten hinaus wirken und Freies Wissen befördern. Wie das aussehen könnte, erklärt Heinz Pampel vom Helmholtz Open Science Office im Gespräch mit iRights.info.
Diagrams of Theory: Parsons' and Merton's Typology of Deviance
Authors: Stoltz Dustin S.
Published: September 2023

In nearly every undergraduate sociology course, we discussed the mid-century sociological tradition “structural functionalism.” But, for me at least, discussions of Talcott Parsons, the theoretical powerhouse that spearheaded the rise of structural functionalism, was strangely absent from my undergraduate sociology courses.
KI und OER: Wie gut passen sie zusammen?
Authors: Fischer Georg
Published: September 2023

KI-Technologien laden dazu ein, wie durch Zauberhand neue Texte, Bilder oder Musik generieren zu lassen. Unter bestimmten Umständen eignen sich KI-Schöpfungen gut als OER. Doch die Entwicklung ist dynamisch. Nicht auf alle urheberrechtlichen Fragen gibt es derzeit Antworten.

Wie funktionieren KI-Technologien?

Technologien Künstlicher Intelligenz (KI) beruhen auf maschinellem Lernen.
Wieso Forschungsdatenmanagement künftig zum wissenschaftlichen Alltag gehört
Authors: Hornung Christoph
Published: September 2023

Daten sammeln, auswerten und sie der wissenschaftlichen Gemeinschaft verfügbar machen – das gehört zum Alltag vieler Forscher*innen. Je mehr und unterschiedliche Daten dabei zusammen kommen, desto notwendiger wird ein sorgsamer Umgang mit ihnen. Christoph Hornung über Grundlagen und Potentiale des Forschungsdatenmanagements. Wissenschaftliches Arbeiten bedeutet in vielen Disziplinen, Daten zu erheben, zu beschreiben und auszuwerten.
Die besten 200 OER-Seiten – „Monobloc“ als Doku – Wie man als A&R in der Musikindustrie arbeitet
Authors: Fischer Georg
Published: September 2023

Auf der Suche nach offen lizenzierten Bildungsmaterialien (OER) oder Tipps, wie man sie am besten nutzt? Eine Liste mit 200 besonders empfehlenswerten OER-Seiten schafft Abhilfe für viele Anliegen. Außerdem in unserer Webschau: Ein Film über den sagenhaften Siegeszug des Plastik-Stuhls „Monobloc“ und eine FAZ-Reportage über die Arbeit von A&Rs in der Musikindustrie.
Handreichung neu aufgelegt: Audiovisuelle Medien rechtssicher in Forschung und Lehre nutzen
Authors: Fiebig Peggy
Published: September 2023

Vor acht Jahren erschien die Handreichung zu urheberrechtlichen Fragen bei der Nutzung von audiovisuellen Materialien in Forschung und Lehre erstmals. Nun wurde sie von den beiden Autoren grundlegend aktualisiert und ist jetzt in einer neuen Fassung veröffentlicht.
Creative-Commons-Lizenzen zurücknehmen oder ändern
Authors: Fischer Georg
Published: September 2023

In manchen Fällen überdenken Urheber*innen die eigens gewählte  Creative-Commons-Lizenz (CC-Lizenz) und möchten sie nachträglich ändern. Solche Änderungen sind allerdings nur in bestimmten Fällen im Nachhinein möglich und empfehlenswert.
Fotos von Personen im Internet veröffentlichen
Authors: El-Auwad Maya
Published: September 2023

Bei Fotos, die Abbildungen von Personen enthalten, spielen insbesondere Datenschutz und Persönlichkeitsrechte eine Rolle. Welche Bedeutung das hat, wann es einer Einwilligung bedarf und welche Ausnahmen es gibt, erläutert der zweite Teil unseres Fotografie-Schwerpunkts.

Fotos machen und Fotos veröffentlichen

Schnappschüsse

anderer Menschen macht wahrscheinlich jede*r, zum Beispiel im Urlaub.
Contrataciones públicas con empresas extranjeras para material aeronáutico de uso militar. Una revisión sistemática
Authors: Salizar Moquillaza Fidel Adrian , Cucat Vilchez Carola Patricia
Published: September 2023

La contratación pública es un mecanismo en donde se hace una intervención responsable en lo económico, social y político de la sociedad, lo que permite orientar el comportamiento de factores que intervienen en un contrato público. El objetivo de esta investigación es realizar una revisión de la literatura publicada en el período 2018-2023 sobre contrataciones públicas con empresas extranjeras para material aeronáutico de uso militar. La metodología empleada fue la revisión sistemática de la literatura científica relacionada con las contrataciones públicas con empresas extranjeras para material aeronáutico de uso militar en las bases de datos Scopus, Web of Sciences, Scielo y Google Académico. Se aplicó la guía Prisma para la selección de estudios y Strobe para evaluar la calidad editorial y metodológica. En la búsqueda inicial se identificaron 338 investigaciones científicas, de las cuales se tamizaron 130 que incluyeron la variable contrataciones públicas en compras militares en Perú en título o resumen, con base en la aplicación de criterios de inclusión y exclusión se meta-analizaron 10 publicaciones científicas. La mayoría de estudios (60%) se distribuyen entre los años 2020-2022, publicados en su totalidad en Perú sobre personal perteneciente al Ejercito (30%) y la Policía Nacional (30%), y solo u 10% de estos pertenecen a la Fuerza Aérea. La totalidad de las investigaciones fueron publicadas en la base de datos Google Académico.
Comparison of Soft Magnetic Composites and Lamination Assemblies
Authors: Lindsley Bruce , Kraus Neal
Published: September 2023

Lamination sheet steel used for magnetic stator cores have excellent magnetic properties within individual sheets. The comparison of these individual sheet properties, such as maximum saturation and permeability, with powder-based soft magnetic composites appears unfavorable for SMC use. The properties of lamination assemblies, however, is lower than individual sheets due to stacking factor and the presence of insulation layers. Further, it is commonly understood that these stacks tend to work best at lower frequency, whereas SMC is more suited to higher frequency. The number of direct comparisons of SMC and lamination steel stacks is limited in the literature, resulting in broad generalizations. In this study, test rings made with assemblies of 2 lamination steel grades and 2 grades of SMC will be evaluated under different test conditions. The direct comparison will enable users of the technology to understand the benefits and limitations of each approach, leading to the best engineering solutions.
The Role Of Apparent Hardness On The Critical Defect Size Derived From Kitagawa-Takahashi Diagrams
Authors: Radis Christos , Wawoczny Dennis , Schneider Markus , Maassen Robert
Published: September 2023

The critical defect size a0 is that defect size a which can be tolerated by the material without a loss of strength. Its magnitude is of relevance for all Non-Destructive Testing methods because it defines the needed resolution limit. The critical defect size a0 depends on materials ductility (apparent hardness H) and on the loading ratio R. Four different sintered steels with a wide apparent hardness H range were chosen for the internal fatigue crack propagation campaign: AS 1000BMn + 2 % Cu + 0.6 % C, FD 4600A + 0.5 % C, FLD-49DH + 0.65 % C and AS 150 HP + 0.5 % C. Moreover, the sintered density ρ was varied between ρ=6.8 g/cm³ and ρ=7.2 g/cm³. Derived da/dN-ΔK curves were combined with existing s-N lines (“Woehler lines”) and the effect of the apparent hardness H on the critical defect size a0 was investigated.
Solvent-on-granules 3D-Printing and Material Extrusion of Soft Magnetic Fe-6.5Si Alloy
Authors: Carreño-Morelli E. , Meylan L. , Rodriguez-Arbaizar M. , Carthoblaz-Délèze X. , Sahli B. , Chandran R. , Balestra G.
Published: September 2023

Soft ferromagnetic parts have been produced by two sinter-based additive manufacturing techniques: Solvent on Granules 3D Printing (SG-3DP) and Material Extrusion (MEX). Fe2.7Si and Fe6.5Si powders were mixed with multicomponent binders, then shaped to granules. Different formulations suitable for SG-3DP and MEX respectively were processed. Square section toroids for magnetic measurements, test cubes and a rotor/stator prototype were printed. The green parts were debound under nitrogen and sintered under hydrogen atmosphere, in a single thermal cycle, using a retort furnace. The sintered parts were characterized by measurements of B‐H hysteresis cycles. The impurity contents of carbon and oxygen were measured by melt extraction. The performance of parts processed by both SG-3DP and MEX methods, was compared with literature values obtained from conventional powder metallurgy processes.
PENERAPAN MODEL PEMBELAJARAN PBL UNTUK MENINGKATKAN HASIL BELAJAR PADA MATERI IKATAN KIMIA
Authors: Asmandhani Suci
Published: September 2023

Penerapan model pembelajaran problem-based learning (PBL) untuk meningkatkan hasil belajar pada materi ikatan kimia. Penelitian ini adalah penelitian tindakan kelas yang bertujuan untuk meningkatkan hasil belajar pada materi ikatan kimia melalui Model PBL. Subjek penelitian ini adalah Siswa Kelas X Mipa 6 SMA Negeri 3 Jayapura sebanyak 34 siswa. Metode yang digunakan diskusi dan dengan pendekatan saintifik-TPACK. Pengumpulan data dilakukan dengan menggunakan teknik observasi dan evaluasi di akhir pembelajaran di setiap akhir siklus. Hasil penelitian ini menunjukkan bahwa: Nilai rata-rata hasil belajar pada mata pelajaran Kimia Siswa Kelas X Mipa 6 SMA Negeri 3 Jayapura pada akhir siklus I nilai rata-rata 75 dengan ketuntasan mencapai 65% , nilai rata-rata hasil belajar siswa pada siklus II terjadi peningkatan menjadi 87 dengan ketuntasan mencapai 83%, dan pada siklus III nilai rata-rata mencapai paling tertinggi yaitu 93 dan ketuntasan mencapai 100%. Hasil belajar pada materi ikatan kimia dapat meningkat dengan menggunakan model PBL.
PENGEMBANGAN MODEL HYBRID SINKRON MATA KULIAH EVALUASI PEMBELAJARAN PADA PRODI PENDIDIKAN TEKNIK ELEKTRO UNIVERSITAS NEGERI MAKASSAR.
Authors: Sari Rosa Mestika , Mangesa Riana T
Published: September 2023

Penelitian ini bertujuan untuk : (a) Menghasilkan model hybrid sinkron yang layak dipergunakan pada mata kuliah evaluasi pembelajan di Prodi PTE Universitas Negeri Makassar; (b) Mengetahui kepraktisan model melalui tanggapan mahasiswa terhadap model hybrid sinkron pada mata kuliah evaluasi pembelajaran dan (c) Mengetahui keefektifan penggunaan model hybrid sinkron pada mata kuliah evaluasi pembelajaran di Prodi PTE Universitas Negeri Makassar. Penelitian ini merupakan penelitian dan pengembangan atau Research and Development ( R & D). Prosedur yang digunakan dalam penelitian ini mengacu pada model ADDIE dengan 5 tahap. Uji validasi dalam penelitian ini melibatkan 4 orang ahli dibidangnya masing-masing. Uji coba dalam penelitian ini mengunakan pengujian disk and carey. Hasil penelitian ini menunjukkan: (a) Model hybrid sinkron sangat layak dipergunakan pada mata kuliah evaluasi pembelajaran berdasarkan hasil penilaian para ahli pendidikan; (b) Kepraktisan model dilihat dari hasil respon terhadap penggunaan model hybrid sinkron diperoleh penilaian dengan hasil penilaian 86 % dan (c) Sesuai hasil pengamatan keterlaksanaan model hybrid sinkron yang mengabungkan 3 media dan respon mahasiswa yang sangat baik, maka  model dinyatakan efektif dipergunakan pada mata kuliah evaluasi pembelajaran.
PENGEMBANGAN MODUL PEMBELAJARAN INSTALASI TENAGA LISTRIK PADA JURUSAN PENDIDIKAN TEKNIK ELEKTRO UNIVERSITAS NEGERI MAKASSAR
Authors: Arianti Wiwi , Rahman Edi Suhardi
Published: September 2023

Penelitian ini merupakan penelitian pengembangan dengan menggunakan modifikasi dari model pengembangan 4–D (Define, Design, Develop, Disseminate). Penelitian ini bertujuan untuk mengetahui hasil pengembangan modul pembelajaran Instalasi Tenaga Listrik dan untuk mengetahui tanggapan mahasiswa terhadap modul pembelajaran Instalasi Tenaga Listrik. Teknik pengumpulan data yang digunakan adalah wawancara, dokumentasi dan angket. Teknik analisis data yang digunakan adalah teknik analisis statistik deskriptif. Subjek pada penelitian ini melibatkan 44 orang mahasiswa Program Studi Pendidikan Teknik Elektro. Hasil penelitian menghasilkan Modul Pembelajaran Instalasi Tenaga Listrik. Hasil validasi dua orang ahli materi dan dua orang ahli media menyatakan bahwa modul pembelajaran yang dikembangkan telah memenuhi semua aspek pengembangan dan layak digunakan. Hasil uji coba kelompok kecil dan uji coba lapangan disimpulkan bahwa buku ajar yang dikembangkan berada pada kategori sangat baik.
Reversibility of Hepatic Histological Damage after Surgical Temporary Obstruction of the Common Bile Duct in a Murine Model
Authors:   Laboratorio de Farmacologia, Instituto Nacional de Pediatria, Mexico City, CP 04530, Mexico, Olguin H. Juarez , Hernandez J. L. Figueroa ,   Departamento de Farmacologia, Facultad de Medicina, Universidad Nacional Autonoma de Mexico. CP 04530, Mexico, Guzman D. Calderon ,   Laboratorio de Neuroquimica, Instituto Nacional de Pediatria, Mexico City, CP 04530, Mexico, Medina R. Alemon ,   Laboratorio de Farmacologia, Instituto Nacional de Pediatria, Mexico City, CP 04530, Mexico
Published: September 2023

The reversibility of hepatic histological damage after restoring bile flow in a murine model was assessed. 25 male Balb C mice (25-35 g, age 6 weeks) were divided into 5 groups and their common bile duct (CBD) fastened to obstruct the release of gall bladder and liver contents. Group I, CBD untied at day 10, group II at day 15, and groups III and IV at days 20 and 30, respectively. Hematoxilin-eosin stained liver slices were analysed 0, 5, 10 and 20 days after restoring bile flow. Group I showed slight histological lesions (second stage), as cholangiolar bile pigment concretion, pericholangiolar and portal collagen accumulation; group II, mild lesions (third stage), as cholangiolar hamartomatous proliferation and bile duct portal fibrosis; group III showed severe lesions (fourth stage), as loss of functional parenchyma, and also the second and first stage lesions. Group IV died before 30 days. First stage corresponds to absent lesions (control group). Group I recovered totally, group II recovered only from slight lesions and group III had irreversible damage. Severity of lesions increased gradually and accumulatively, irreversible hepatic damage was achieved at 20 days and is deadly at 30 days. Our model of temporary CBD obstruction was suitable to assess reversibility of hepatic histological damage.
Orthodontic Molar Brackets: The Effect of Three Different Base Designs on Shear Bond Strength
Authors:   Oral and Dental Research Institute, University of the Western Cape, Cape Town, South Africa, Grobler Sias R. , Hudson Athol P. , Harris Angela M. P. ,   Department of Orthodontics, University of the Western Cape, Cape Town, South Africa
Published: September 2023

The purpose of the study was to assess the relative base designs of three different maxillary molar stainless steel brackets with reference to the shear bond strength of three different adhesive resins. The molar brackets used were Victory series (3M Unitek), Upper Molar (GAC) and Optimesh XRT (Ormco). The adhesives used were Transbond XT (3M Unitek), Enlight (Ormco) and Sure Ortho Light Bond (Sure Orthodontics). The human enamel specimens (144) were randomly divided into nine groups and each group (n=16) was allocated to a bracket/adhesive combination. The contact surface of each of the bracket bases was measured three dimensionally using a reflex microscope. The base designs were also subjected to further microscopic investigations. The brackets were bonded to the enamel, temperature cycled and the shear bond strength was measured. The size and design of each of the brackets was different. The base size, surface treatment, mesh strand diameter and aperture size of the bracket base mesh have a significant effect on the shear bond strength at the bracket/adhesive interface. The shear bond strengths of all three Ormco bracket/adhesive resin combinations (5.8-6.8 MPa) were significantly lower (p<0.05; Kruskal-Wallis) than the other six bracket/adhesive combinations (9.4-12.1 MPa). The different adhesive types (3 types) could not be mainly responsible for the low shear bond values found for the Ormco bracket. The 3M Unitek combination of the Victory series bracket and Transbond XT adhesive proved to have a high shear bond strength without enamel damage.
Statistical Analysis of Pseudoexfoliation Syndrome Prevalence, Glaucoma and Coronary Artery Disease of the Patients with Cataract
Authors:   Department of Mathematics and Statistics, Radford University, VA, 24142, USA, Xu Yong , Cosmas Nicolaos ,   Technological Educational Institute of Mesologgi, TEI, Greece, Gartaganis Sotirios ,   University of Patras, Greece
Published: September 2023

Cataract is a common disease of the eye and cataract development is usually a very gradual process of normal aging. Many people with cataract disease can also have pseudoexfoliation (PEX) syndrome, glaucoma and coronary artery disease (CHD). We use the data from the Department of Ophthalmology, Medical School of the University of Patras, Greece. These data contains 2140 Greek patients from the southwestern Greece with cataract disease. In order to investigate the association between any two variables statistical analysis were studied. Considering the binary behavior of the response we decide to use non parametric analysis in this study to deal with the testing the populations mean with different distributions.
Herbal Extract of Gynostemma Pentaphyllum Decreases Hepatic Glucose Output in Type 2 Diabetic Goto-Kakizaki Rats
Authors:   Depatment of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden, Yassin K. , Ostenson C. G. ,   Depatment of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden, Huyen V. T. T. ,   Department of Internal Medicine, Hanoi Medical University, Hanoi, Vietnam,   Department of Endocrinology and Diabetes, National Institute of Gerontology, Hanoi, Vietnam, Hoa K. N. ,   Department of Internal Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
Published: September 2023

The aim of the study was to explore the effect of Gynostemma pentaphyllum (GP) extract on hepatic glucose output (HGO) in spontaneously type 2 diabetic Goto-Kakizaki (GK) rats treated orally with GP or placebo extract 1600 mg/kg daily, during three days or three weeks. The three-week treatment of GP, but not three-day treatment, significantly reduced plasma glucose (PG) levels from 9.8 ± 0.6 to 6.8 ± 0.4 mmol/L (p=0.027) in GK rats, whereas PG levels were not significantly decreased in the placebo rats. Glucose tolerance assessed by an intra-peritoneal glucose tolerance test was significantly improved in GP treated compared to placebo treated group (areas under the glucose curves, AUCs, from 0 to 120 min were 1150 ± 200 vs. 1761 ± 87 mmol/L; p=0.013). The glucose response in an intra-peritoneal pyruvate tolerance test from minute 15 to minute 120, the AUC (15-120) was significantly lower in the GP group (415.5 ± 68.0 vs. 641.5 ± 41.8 mmol/L; p<0.05). In liver perfusions, the AUCs for HGO during 18 min (0-18 min) were significantly decreased in GP treated rats compared with control rats (302.8 ± 36.5 vs. 423.5 ± 44.7 µmol, p<0.05). The three-week GP treatment significantly reduced the hepatic glycogen content, but not glycogen synthase activity compared to placebo group (p<0.007). In conclusion, three-week treatment of GP extract exerted anti-diabetic effect in GK rats, reducing plasma glucose levels and HGO, suggesting that GP improves the hepatic insulin sensitivity by suppressing gluconeogenesis.
Pattern of Paediatric Neurological Disorders in Port Harcourt, Nigeria
Authors:   Department of Paediatrics, University of Port Harcourt Teaching Hospital, Port Harcourt, Nigeria, Frank-Briggs A. I. , Alikor E. A. D
Published: September 2023

Background: Paediatric Neurological disorders in developing countries are very challenging. This is due to its chronicity, late presentation and unavailability of modern diagnostic facilities in developing countries like Nigeria. Lack of these modern technology and manpower contribute significantly to increased morbidity and mortality. This study demonstrates the pattern of neurological disorders and the challenges in management in a developing country. Materials and Method: This was a retrospective hospital based analysis of neurological disorders seen in the Paediatric neurology unit of the University of Port Harcourt Teaching hospital, Nigeria from January 2004 to December 2009. Descriptive statistics was used to present the result. Result: A total of 35,473 patients were seen in the Paediatric unit. Of these 2,379 had neurological disorders. This gave a prevalence of 6.7% of Paediatric neurological disorders. There were 1,431 males and 948 females (male: female ratio of 1.51:1.0). The age ranged from 3 months to 15 years. The age group 1->5 years accounted for the most affected age group constituting 87.7%. The most frequent Paediatric neurological disorders were epilepsy (24.6%), cerebral palsy (15.4%), and central nervous system infections (9.5%). Conclusions/Recommendation: Wide spectrums of neurological disorders occur in our environment. The high incidence of epilepsy and cerebral palsy suggests that effort should be geared towards educating the populace about early diagnosis and prompt management.