bluuebunny/crossref_metadata_2025 huggingface dataset:
Discounted payments theorems for large deviations
Authors: Kasparavičiūtė Aurelija , Deltuvienė Dovilė
Published: November 2019

Let Z(t) = Σ j=1N(t) Xj, t ≥ 0, be a stochastic process, where Xj are independent identically distributed random variables, and N(t) is non-negative integer-valued process with independent increments. Throughout, we assume that N(t) and Xj are independent. The paper considers normal approximation to the distribution of properly centered and normed random variable Zδ =∫0∞e- δt dZ(t), δ > 0, taking into consideration large deviations both in the Cramér zone and the power Linnik zones. Also, we obtain a nonuniform estimate in the Berry–Essen inequality.
Transformation of criteria with a-priori chosen optimal values
Authors: Podviezko Askoldas , Podvezko Valentinas
Published: November 2019

Aim of multiple criteria decision-aid (MCDA) methods is to find the best alternative among the ones that are available or to rank alternatives in the order of preference. There are the following core pillars of the methods: the set of criteria and matrix with values of criteria that characterise the evaluated alternatives (decision matrix); and vector of weights that reflect relative importance of criteria. Usually, two types of criteria are used by researchers. Maximising criteria (e.g. profits) reflect a better situation whenever the larger value has been attained. While in case a criterion is minimising (e.g. costs), the better situation is reflected when its value is smaller. Such situations, when the best value of a criterion has a certain value, which differs from the maximal or the minimal, are usually not considered. This paper aims to fill this gap. Such criteria will be named as criteria with a-priori chosen optimal values. The aim of the paper is to propose appropriate types of transformation for criteria with a-priori chosen optimal values. Such transformations appear to be general and can be used with all three types of criteria.
On the security of RSA textbook signature scheme on Paillier ciphertext
Authors: Mihalkovich Aleksejus , Sakalauskas Eligijus
Published: November 2019

In this paper we consider Pailler encryption and RSA textbook signature. We show that due to valuable homomorphic property these algorithms can be used together to obtain a valid signature on a certain combination of ciphertexts. Our goal is to show that this combination of algorithms provide security against chosen plaintext and chosen ciphertext attacks.
Revised fast convolution
Authors: Pupeikis Rimantas
Published: November 2019

It is assumed that linear time-invariant (LTI) system input signal samples are updated by a sensor in real time. It is urgent for every new input sample or for small part of new samples to update a convolution as well. The idea is that fast Fourier transform (FFT) algorithm, used to calculate output frequency samples (f.s.), should not be recalculated with every new input sample. It is needed just to modify the convolution algorithm, when the new input sample replaces the old one. An example of computation of the convolution with ordinary and modified 8-point Fourier code matrix is presented.
Ex Vivo Evaluation of a Restoration Protocol for Teeth with Simulated Incomplete Rhizogenesis
Authors: Retana-Lobo DDS, MSD Cristina , Reyes-Carmona DDS, MSD, PhD Jessie
Published: November 2019

The use of phosphate buffered saline (PBS) as an intracanal medication triggers a biomineralization process within mineral trioxide aggregate (MTA) apical plugs during the apexification process in teeth with incomplete rhizogenesis. However, no consensus is available in the literature regarding a restorative protocol for this type of treatment. Thus, the objective of this study was to use scanning electron microscopy (SEM) to evaluate the processes of biomineralization and adhesion in a restorative protocol for teeth with simulated incomplete rhizogenesis. Methodology: Root sections with a thickness of 2mm and cavities with a diameter of 2mm were used. The sections were randomly prepared and filled with the following materials: Group 1 (n=12), ProRoot MTA; and Group 2 (n=12): MTA Exp. Subsequently, the samples were immersed in PBS for 35 days. Every 5 days, the PBS was replaced, and the precipitates were collected, dried, and weighed. Two samples from each group were analyzed by SEM. Moreover, 24 single-rooted teeth were standardized, incomplete rhizogenesis was simulated, and 5-mm-long apical plugs were created with Pro Root MTA. As an intracanal medication, PBS was used for different periods of time: Group 1:48 h; Group 2:7 days; and Group 3:15 days. Then, fiberglass posts were cemented with the REBILDA® Post System. The samples were prepared and analyzed by SEM. Results: ProRoot MTA and MTA Exp effectively promoted the formation of carbonated apatite precipitates and biomineralization with dentin. ProRoot MTA yielded more carbonated apatite precipitates compared to MTA Exp (p=0.0536). The use of PBS as an intracanal medication for 7 and 15 days promoted intratubular mineralization (MIT), and treatment for 15 days was more effective (p < 0.05). The REBILDA® Post System effectively promoted the microimbrication of the adhesive system and the formation of resinous tags with lateral adhesive branches. Conclusion: Apexification with MTA associated with the use of PBS as an intracanal medication for 15 days, in addition to the use of the REBILDA® Post System, seems to be a feasible restorative protocol.
PENGELOLAAN IKAN BATAK (Neolissochilus thienemanni) DI PERAIRAN UMUM DARATAN, DANAU TOBA, PROVINSI SUMATERA UTARA
Authors: Rachmad Basuki , Sihombing Emalia , Sabariyah Nunung
Published: November 2019

ABSTRAK            Ikan batak (Neolissochilus thienemanni) merupakan ikan endemik Sumatera Utara khususnya Danau Toba, Hulu Sungai Asahan, dan telah masuk dalam kategori terancam punah (vulnerable) berdasarkan IUCN Red List dan sudah sangat sulit untuk ditemukan di habitat alaminya. Ikan ini termasuk famili Cyprinidae yang merupakan ikan omnivora dan hidup di sungai beraliran deras. Tujuan penelitian untuk mengetahui aspek biologi, aspek perikanan, kualitas perairan serta upaya pengelolaan ikan batak. Lokasi penelitian adalah tiga kabupaten di Provinsi Sumatera Utara pada bulan Agustus hingga Oktober 2018. Penelitian ini dilakukan dengan menggunakan metode sensus. Hasil pengamatan ditemukan 38 ekor ikan batak (25 ekor jantan; 13 ekor betina) dengan ukuran panjang berkisar 16 s.d 41.9 cm dan berat berkisar 73 s.d 392 gram. Pertumbuhannya bersifat allometrik negatif. Sex ratio menunjukkan tidak ada perbedaan nyata antara jantan dan betina (1 : 0,52).  Di dominansi adalah TKG III dengan jumlah 16 ekor (11 ekor jantan ; 5 ekor betina). Nilai Lc = jantan 26,00 cm; betina = 25,04 cm, dan Lm = jantan 25,89 cm; betina 23,29 cm. Hubungan antara Lc dan Lm menunjukkan bahwa ikan yang tertangkap sudah matang gonad terlebih dahulu. Kebiasaan makan ikan didominasi oleh biji-bijian 37%, plankton 25%, siput 22% dan serangga 16%. Berdasarkan hasil penelitian, belum adanya pengelolaan yang berkelanjutan mengenai ikan batak, baik dari pemerintah maupun masyarakat lokal. Jika dalam waktu panjang penangkapan ikan endemik terus meningkat, maka akan mengakibatkan hilangnya populasi sementara ikan batak dan perubahan rantai makanan.
Impacts of advanced physiotherapy: A narrative literature review
Authors: Williams Anna H. , Stotter Gill , Hefford Cheryl , Warren Jonathan , Darlow Ben
Published: November 2019

Changes to healthcare design and delivery involving advanced physiotherapy roles may help health systems to meet challenges imposed by ageing populations, long-term conditions and unsustainable healthcare costs. This narrative literature review examined recent peer-reviewed literature (2010–2017), including primary studies and systematic reviews, that investigated the impact of advanced physiotherapy on healthcare efficacy, efficiency, service design or perceptions (consumers or health professionals) of these advanced roles. Thirty-five studies were included that investigated advanced physiotherapy roles in primary care, emergency department, orthopaedic outpatient and rheumatology clinic contexts. Implementation of these roles was found to reduce waiting times for appointments, reduce length of stay, improve access to care, reduce other clinicians’ workload in primary care and emergency departments, streamline orthopaedic surgeons’ caseload, and improve patient satisfaction. Some studies observed patient recovery outcomes following advanced practice physiotherapist care, but none compared these to existing models of care. In addition, few studies explored non musculoskeletal physiotherapy fields or the New Zealand context, and no studies investigated the impact on consumer choice. More clearly defined and consistent use of advanced physiotherapy roles within the literature would enable a better understanding of the potential impact on health care. Overall, evidence suggested that advanced physiotherapy roles may provide benefits to the public and health system when implemented in innovative, interdisciplinary and non-traditional ways.
Physiotherapy student experience of a mindful movement and a mindful stress-reduction intervention: A qualitative study
Authors: McConville Janet , Lewis Deborah , Chambers Richard , Hassed Craig
Published: November 2019

Increasing levels of psychological distress in university student populations are a growing concern. Mindfulness training provides a potential intervention to improve well-being outcomes. This paper uses a thematic analysis approach to explore the experiences of pre-clinic physiotherapy students participating in a six-week mindfulness programme based on either sitting meditation or mindful movement. Semi-structured interviews were conducted with 12 students immediately post intervention and six students at a six-week follow-up. Interviews were transcribed and coded, and the data analysed and interpreted. One main theme (increased self-awareness) and five sub-themes (mental health, self-care, communication, study engagement, and awareness of movement) were identified. Participants were more aware of their own stress response and the mental processes, such as rumination, that gave rise to these experiences. Participants reported making healthier lifestyle choices, including increased exercise and improved diet. They reported improved listening and communication, and study time was more focused and productive. Participants in the mindful movement group also reported increased awareness of their own physical movement and that of others. Participants engaged well with both the six-week mindful stress-reduction intervention and six-week mindful movement intervention, reporting improvements in well-being, communication and academic engagement.
Bibliometric analysis of dividend policy research
Authors: Millán-Toledo Cristian
Published: November 2019

Bibliometrics focuses mainly on the scientific literature analysis in a quantitative way, both in production and consumption, as it can be used as a source of detailed and systematized information of the scientific production in a discipline. The objective of this article is to use bibliometric indicators to provide a scientific production analysis about dividend policy focusing on key aspects in its analysis: scientific journals, articles, institutions, authors and the most influential countries. The sample covers the period from 1975 to 2016.RESUMENLa bibliometría se centra en el análisis de la literatura científica de manera cuantitativa, ya sea tanto en la producción como en su consumo. Pudiendo servir como fuente de información detallada y sistematizada de la producción científica en una disciplina. El presente artículo tiene por objetivo utilizar indicadores de bibliometría, para entregar un análisis de la producción científica acerca la política de dividendos. Centrándose en aspectos claves en su análisis: revistas científicas, artículos, instituciones, autores y países más influyentes. La muestra abarca el periodo desde 1975 a 2016.RESUMOA bibliometria enfoca principalmente na análise da literatura científica de maneira quantitativa, tanto na produção quanto no seu consumo. Podendo servir como fonte de informação detalhada e sistematizada da produção científica em uma disciplina. O presente artigo tem como objetivo utilizar os indicadores de bibliometria, para fornecer uma análise da produção científica sobre a política de dividendos. Focando em aspectos-chave em sua análise: revistas científicas, artigos, instituições, autores e países mais influentes. A amostra cobre o período de 1975 a 2016.
Education and quality
Authors: Bonaveri Pablo , Sanabria Landazábal Néstor Juan
Published: November 2019

Some general aspects of quality and higher education
Entrepreneurs in México, an approach to their quality of life
Authors: Charles-Leija Humberto , Sánchez Rodríguez Rogelio , Ramírez Jaramillo Ana Laura , Aguirre Peña Jonathan
Published: November 2019

The objective of the research is to compare the levels of satisfaction between entrepreneurs and subordinates. For the study, data from the Self-Reported Welfare Survey (Biare) of 2014 are used. The work method is a statistical exploration of the data on entrepreneurs. The results suggest that there is no significant difference between the levels of job satisfaction of the two groups. A relevant finding is that entrepreneurs declare less satisfaction with life and with health than subordinates. This may be related to the fact that the owners of SMEs have high workloads with repercussions on their health. Among the limitations of the study is that the survey was prepared by INEGI and not by the researchers, given that it was not possible to incorporate some questions. The originality of the work lies in being a pioneer in the study of entrepreneurs about their subjective well-being.RESUMENEl objetivo de la investigación es contrastar los niveles de satisfacción personal entre emprendedores y subordinados. Para el estudio se emplean datos de la Encuesta de Bienestar Autorreportado (Biare) del 2014. El método del trabajo es una exploración estadística de los datos sobre emprendedores. Los resultados apuntan a que no existe diferencia significativa entre los niveles de satisfacción laboral de los dos grupos. Un hallazgo relevante es que los emprendedores declaran menor satisfacción con la vida y con la salud que los subordinados. Ello puede relacionarse con que los dueños de Pymes tienen elevadas cargas de trabajo con repercusiones en su salud. Entre las limitaciones del estudio se encuentra que la encuesta fue elaborada por INEGI y no por los investigadores, dado lo cual no fue posible incorporar algunos cuestionamientos. La originalidad del trabajo radica en ser pionero en el estudio de los emprendedores en referencia a su bienestar subjetivo.RESUMOO objetivo da pesquisa é comparar os níveis de satisfação pessoal entre empreendedores e subordinados. Para o estudo, são utilizados dados do Self-Reported Welfare Survey (Biare) de 2014. O método de trabalho é uma exploração estatística dos dados sobre empreendedores. Os resultados sugerem que não há diferença significativa entre os níveis de satisfação no trabalho dos dois grupos. Uma descoberta relevante é que os empresários declaram menos satisfação com a vida e com a saúde do que os subordinados. Isso pode estar relacionado ao fato de que os proprietários de PMEs têm altas cargas de trabalho com repercussões em sua saúde. Entre as limitações do estudo, a pesquisa foi elaborada pelo INEGI e não pelos pesquisadores, uma vez que não foi possível incorporar algumas questões. A originalidade do trabalho está em ser pioneira no estudo de empreendedores em referência ao seu bem-estar subjetivo.
Design Sprint versus Design Thinking: A comparative analysis
Authors: Figueiredo Lucas Baraças , Fleury André Leme
Published: November 2019

Context: Design Sprint (DS) is a new design methodology for designing new products that resembles Design Thinking (DT) in designing solutions that diverge and focus on the problem and solution fields, to be then tested in prototypes. Yet it differs from DT by incorporating Lean Startup concepts such as agility and elimination of costly or low-value activities. Although it gained increased interest in the organizational world, it is still unexplored in the literature, without an analysis of best practices, and how this process may be more appropriate than traditional DT processes. Objective: In spite of the improvements proposed by the design community to the original process, this study aims to perform a comparative analysis of the DS process, as prescribed in the book that originated the methodology, against traditional DT processes, considering its phases and techniques , and what the advantages and disadvantages of each methodology are. Method: The research used the methodological approach of multiple case study by evaluating three DS processes in a company that executes processes with both methodologies. In addition to observing the processes and documenting the decisions made, six interviews were conducted with company partners and experts from the area, who participated in the processes. Results: The article describes the execution of DS processes in detail and then summarizes the advantages of these processes against DT processes, such as: low experimentation barrier, alignment with high management for continuing the work, orientation to incremental innovations. Nevertheless, the coexistence of the two methodologies is proposed, such that DS can be more efficient when used as an initial stage of requirements of new products, while DT proves to be more useful as a methodology for generating new ideas. Conclusion: The research on theoretical and practical contributions by investigating a topic not yet explored in the literature, positioning positive and negative aspects of DS in relation to other more established design methodology (DT), and suggesting how these methodologies can be applied more efficiently to creating new products and services.
A Importância de Incentivos Governamentais para Aumentar o Uso da Energia Solar
Authors: MELIN Monise Fernanda Maciel , Camioto Flávia de Castro
Published: November 2019

A produção de energia renovável vem crescendo em todo o planeta tendo como um dos objetivos atender a demanda crescente da população e cumprir o compromisso firmado na 21ª Conferência das Partes. Nesta, os países se comprometeram a reduzir a emissão de gases do efeito estufa, causada por fontes tradicionais como a queima do carvão, e assim manter a temperatura média global inferior a 2ºC. Diante desse cenário, a energia solar tem obtido grande foco por ser uma energia limpa, abundante e pouco explorada em todo o planeta. O Brasil recebe irradiação suficiente para atender toda a demanda do país somente com esta fonte, mas devido ao investimento inicial, não tem atraído a população a instalar os sistemas fotovoltaicos. Logo, o trabalho discutiu a importância dos incentivos governamentais para que haja um aumento efetivo da produção de energia solar fotovoltaica no Brasil. Para isso, países líderes nesta geração, como China, Japão, Alemanha e Estados Unidos foram estudados, observando o crescimento antes e depois das políticas implementadas, suas premissas e resultados, a fim de comparar com o que vem sendo feito no Brasil, um país com grande potencial de geração, mas que possui apenas 0,02% de sua energia produzida desta fonte. Averiguou-se que os incentivos aplicados atualmente no Brasil são de âmbito fiscal, e pouco se investiu em políticas de compra de energia ou mesmo subsídios efetivos para instigar a população, resultando no baixo crescimento de geração solar anual comparado aos países analisados.
Análise ergonômica do trabalho: utilização dos métodos OWAS e RULA em uma indústria do ramo alimentício na cidade de Mossoró-RN
Authors: Lima Paulo Ricardo Fernandes de
Published: November 2019

O presente estudo tem o objetivo de realizar uma análise ergonômica do trabalho em uma indústria do ramo alimentício localizada na cidade de Mossoró-RN. Devido às condições encontradas, optou-se pela utilização dos métodos OWAS e RULA. A pesquisa classifica-se como aplicada, descritiva e quantitativa, com realização de um estudo de caso. Escolheu-se duas atividades para a análise: Posto de trabalho I – Embalagem; Posto de trabalho II – Carregamento/Paletização. Através de observações, registros e relatórios diários, coletou-se informações do local e dos colaboradores. Utilizando-se o software Ergolândia, versão 6.0, compilou-se os dados e verificou-se risco 2 e 3 de criticidade para os postos I e II, respectivamente. Isto sugere a necessidade de mudanças a médio prazo sob pena de problemas maiores em um futuro próximo. Assim, houve a elaboração e implantação de um plano de ações interventoras no ambiente estudado. Ao fim das modificações propostas, verificou-se, por meio de uma nova análise ergonômica de trabalho, melhores condições laborais. Além disso, entrevista com funcionários comprovou a percepção dos benefícios reais alcançados com as alterações aplicadas.
Ei tverrfagleg tilnærming til scenespråk
Authors: Gjefsen Ragnhild
Published: November 2019

This article explores a possible methodological framework for investigating verbal theatre language. Using an interdisciplinary approach, combining theatre studies with sociolinguistics, it is possible to increase knowledge about conventions and changes in Norwegian theatre language in the 20th century. I will demonstrate how sociolinguistics can provide a broader understanding of the development in Norwegian theatre, through investigating socially meaningful variation in theatre language.
Effect of torsion on the undrained limiting lateral resistance of piles in clay
Authors: Georgiadis Konstantinos , Sheil Brian
Published: November 2019

The behaviour of piles subjected to lateral loads has been explored by a number of investigators over the past five decades. However, the vast majority of the previous literature has ignored the potential influence of additional torsional effects due to horizontal eccentricities of the applied lateral loads. In this paper, an upper bound mechanism and a lower bound stress field are presented for the calculation of the ultimate combined torsional and lateral loads on single piles in clay. The corresponding analytical upper and lower bound plasticity solutions are shown to be in excellent agreement, bracketing the theoretically exact failure loads with an error of less than 0·5%. Two-dimensional finite-element analyses are also presented and the computed ultimate loads and observed failure mechanisms are shown to compare very well with the plasticity solutions. Based on the numerical results and analytical solutions, failure load interaction diagrams and a simple empirical equation are presented that allow the calculation of the lateral bearing capacity factor for any level of applied torsion and pile–soil adhesion factor. It is demonstrated that the effect of torsion can be very significant, causing reduction in lateral bearing capacity of up to 50% and therefore should be considered in design.
Editöre Mektup
Authors: ALTAY Murat
Published: November 2019

Tıp
Dergisi 2016; 6(3): 60-4 sayısında,
Dr. Mehmet Faruk Çatma, Dr. Alper Öztürk ve Dr Mehmet Atıf Erol Aksekili
tarafından  “Kalça ekleminden kurşun çekirdeği çıkarılmasının klinik ve fonksiyonel
sonuçları: Üç olgunun 5 yıllık takibi” makalesi ile ilgili olarak
tarafınıza göndermiş olduğum Editöre Mektup; Cilt:9, Sayı:1, Mart 2019’da yayınlanmıştı. Bu
mektuba istinaden yazarlar tarafından Cilt: 9, Sayı: 3, Eylül 2019’da yayınlanan cevabi
mektuba yanıt.
Salmonella blood culture surveillance: SOP's ITM v1
Authors: Tack Bieke
Published: November 2019

Standard operating procedures for Salmonella blood culture surveillance of the unit of tropical bacteriology at the Institute of Tropical Medicine in Antwerp (Belgium): - Blood culture work-up - Pathogen identification - Salmonella serotyping - Antibiotic susceptibility testing
Hochflexible Produktion mit agentenbasierter Steuerung
Authors: Adolph Thomas
Published: November 2019

Industrie 4.0 ist in aller Munde. Die vierte industrielle Revolution ist in vollem Gange: Vernetzung und Steuerung von Maschinen und Abläufen verändern die Produktionsprozesse gravierend. Die Sick AG hat auf diesem Feld Pionierarbeit geleistet und ein zukunftsfähiges Produktionssystem geschaffen, das Anforderungen insbesondere im Hinblick auf Industrie 4.0 erfüllt. Das Unternehmen hat den Weg von einer klassischen über eine zukünftige Struktur von Arbeitsplätzen, Maschinen und Produktionslinien hin zu einer Produktionssteuerung, die auf einem Multiagentensystem basiert, gemeistert. Teilweise wurden hierfür Lösungsansätze aus der Softwareentwicklung auf die Bedürfnisse der Produktion übertragen sowie Konzepte allgemein beschrieben, um diese auf verschiedene Fertigungsbereiche anpassen zu können.
Determination of Formaldehyde Lizardfish (Saurida tumbil) during Freezing Storage
Authors: Nurhayati Tati , Abdullah Asadatun , Sari Sharah Novita
Published: November 2019

Formaldehyde (FA) in fish is formed as a result of fish quality decreasing, in particular the freshness of fish. The level of fish freshness can not be increased but maintained. Quality of fish can be maintained by proper handling processes, one of them is handling with low temperatures. The purpose of this study was to determine the formation process of FA lizardfish (Saurida tumbil) during freezing storage. The treatments applied were gutted and ungutted. Observations were made every 2 weeks for 22 weeks. The parameters measured were sensoric, pH, total volatile base (TVB), trimethylamine (TMA), formaldehyde (FA) and dimethylamine (DMA). The results obtained showed that FA formed after two weeks. Levels of FA formed in gutted lizardfish are 12.96 ppm and 17.77 ppm for ungutted. Formaldehyde (FA) formation occurs when the condition of the fish is still fresh with TVB content of below 20 mg N/100 g. Dimethylamine (DMA) levels when FA is formed of 7.99 ppm for gutted lizardfish and 5.50 ppm for ungutted. Formaldehyde (FA) formation also accompanied by the increation of other decay indicators.
Profiling of Collagens from Swim Bladder of Catfish (Pangasius sp.) by Acid Extraction
Authors: Br Sitepu Gressty Sari , Santoso Joko , Trilaksani Wini
Published: November 2019

Swim bladders of catfish contain high protein, therefore it is can be used as a raw material for collagen. The study aims to determine the chemical characteristics of swim bladders, the pretreatment of non-collagen, extraction of collagen dissolves acid and to evaluate the characteristics of collagen. The method of this study is KOH pretreatment with a concentration of 0,05; 0,1; and 0,15 for 12 hours. The extraction process is done by soaking the sample in a solution of acetic acid with a concentration of 0,25; 0,5 and 0,75 M (ratio 1:10; b/v) and extraction time for 24; 48; and 72 hours at 4oC. The experimental design used for alkaline and acetic acid pretreatment were factorial completely randomized design. The result showed that the protein content of swim bladder was 85,26% (db), the profile of amino acids were dominated by three amino acids namely glycine (56,85 mg/g), prolyne (31,03 mg/g), and alanyne (23,85 mg/g). Using 0,05 M KOH for 8 h was selected as the best pretreatment method for collagen extraction. Extraction method using 0,50 M acetic for 48 h resulted he best collagen which revealed the existence of a triple helix structure and had Tg 84oC.
Effects of Alkaline Pretreatment on the Characteristics of Collagen from Mangrove Conch (Telescopium telescopium)
Authors: Purwaningsih Sri , Triono Riyan
Published: November 2019

The horn snail (Telescopium telescopium) is a gastropod living in mangrove forests and is considered as a pond pest. This study was aimed to determine the effects of alkaline and acetic acid pretreatment on the characteristics of collagen from the horn snail meat. The immersion of the meat in NaOH 0.20% for 10 hours gave a significant reduction in non-collagen protein content (α = 0.05). Further immersion with acetic acid 0.05% for 6 hours also significantly affected (α = 0.05) the swelling degree and the collagen solubility. The extraction yield was 1.08±0.21%, with 72.23% of brightness, and the viscosity was 16.34 cP. The proline content of the collagen was 9.21%.
Using Oven Microwave for Synthesis ZnO Nps using Sargassum sp. and Padina sp. Extract
Authors: Sari Rodiah Nurbaya , Irianto Hari Eko , Ayudiarti Diah Lestari
Published: November 2019

An oven microwave was established for synthesis of zinc oxide nanoparticles using Sargassum sp. and Padina sp. extract and 0.1 M ZnCl2 solution as a precursor. The ZnO nanoparticles had been characterized such as chemical structure by Fourier transform infrared (FTIR) spectroscopy, particle size distribution with Particle Size Analyzer (PSA), Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEMEDS) and crystalline properties with X-ray diffraction (XRD). The result showed that FTIR spectra revealed the involvement of hydroxyl groups and sulfate polysaccharide in the formation of ZnO NPs and protein was involved in stabilizing. PSA analysis showed that the size ranged of ZnO NPs extract Sargassum sp. synthesized 351,14 and 1.336.19 nm for extract Padina sp. The particle size distribution was homogeneous but their size hadn’t met the size of nanometers. The range of %mass elements Zn and O ZnO extract Sargassum sp. and Padina sp. synthesized didn’t approach standard ZnO. The crystallinity properties showed only ZnO extract of Padina sp. synthesized which had a peak with an angle value of 2θ was almost equal to standard ZnO and after confirmed to Match program! 3 crystal structure ZnO synthesized wasn’t imperfect hexagonal wurtzite. Ovens microwave could be used to synthesize ZnO from Padina sp. extract but it was still necessary to develop a method so that ZnO could be obtained with nanoparticle size and ideal hexagonal wurtzit structure.
Student Consultancy Service: Prediction of Course Grades in Course Selection Phases Using Artificial Intelligence Techniques
Authors: KAYNAK Sümeyye , KAYNAK Baran , EVİRGEN Hayrettin
Published: November 2019

Universities offer
technical elective courses to allow students to improve themselves in various
parts of their majors. Each semester, the students make a decision regarding
these technical electives, and the most common expectations students have in
this context include, getting education at a better school, getting a better
job, and getting higher grades with a view to securing admission into more
advanced degree programs. Electing a course on the basis of the interests and
skills of the student will naturally translate into achievement. Advisors, in
this context, play a major role. Yet, the substantial workload advisors have
already assumed prevent them dedicating enough time for exploring the interests
and skills of the students, and hence hinder the development of the required
relationship between students and their advisors. This study attempts
to estimate the achievement level a student intends to elect, on the basis of
graduate data received from the database of students of Sakarya University,
Faculty of Computer and Information Sciences, and led to the development of a
decision-support system. The application used ANFIS and artificial neural
network methods among the artificial intelligence techniques, alongside the
linear regression model as the mathematical model, whereupon the performance of
the methods were compared over the application. In conclusion, it was observed
that artificial intelligence techniques provided more relevant results compared
to mathematical models, and that, among the artificial intelligence techniques
feed forward backpropagation neural network model offered a lower standard
deviation compared to ANFIS model.
A Case Study on Students’ Identity Perceptions Using Literary Sources in Reading Courses
Authors: ÖZSEVGEÇ Yıldırım , MUTLU Volkan
Published: November 2019

Literary works are
conventional materials used in reading lessons because of their accessibility
and ease of use. Regarding that situation, the purpose of this study is to
gather the prep class students’ perceptions about literary works as course
materials and examine the data by taking into consideration the national
identity and class distinction. In this case study, JaneAusten’s
two novels Pride and Prejudice and Sense and
Sensibility are discussed in reading lessons in prep classes. At the end of
this process, 36 students are asked to complete an unstructured form to express
their thoughts on these books. As the results show, half of the students state
that choosing literary sources make them aware of author’s intentions, and the
contextual factors such as the political, social, and historical background of
the text. Students generally read novels, but they do not give importance to
reading these novels in English or reading literary sources which will be a
preliminary preparation for their department.
Teacher Roles in the Blended Classroom – Swedish Lower Secondary School Teachers’ Boundary Management between Physical and Virtual Learning Spaces
Authors: GYNNE Annaliina , PERSSON Marcus
Published: November 2019

The purpose of the study is to explore how Swedish lower secondary school teachers manage blended learning environments, established through using a specific learning management system (LMS) application. In the study, four teachers were followed during a four-month (n)ethnographic fieldwork. Based on analyses of data from video-recordings and observations in physical and virtual classrooms, the study examines teachers’ practices of integrating and segmenting the two classroom domains. In order to unpack the realms of these practices, the study employs affordance and boundary theories. Through the analysis of participants’ boundary practices and their use of communicative affordances in and across space and time, four teacher roles, enacted and emerging through teaching practices, are presented. The paper concludes with a discussion of how participants’ engagement with virtual and physical learning environment compels teachers to reflect upon their preferred teacher role in the new multidimensional classrooms.
Öğretmen Adaylarının Ölçüler Konusunda Öğrenci Hatalarını Tespit Etme Becerileri ve Hataların Giderilmesine İlişkin Önerileri
Authors: USTA Neslihan
Published: November 2019

Bu çalışma, öğretmen adaylarının yazılı açıklamaları ve bu adaylar arasından amaçlı örnekleme yöntemiyle seçilen 10 öğretmen adayı ile yapılan görüşmelerle öğrenci hatalarına yaklaşımlarını ve bu hataların giderilmesine yönelik çözüm önerilerini konu edinmektedir. Bu nedenle çalışmada nitel yaklaşıma dayalı durum çalışması yöntemi tercih edilmiştir. Katılımcılar Batı Karadeniz Bölgesi’nin bir ilinde bulunan bir devlet üniversitesinde öğrenim gören 45 dördüncü sınıf öğrencisidir. Çalışma 2015-2016 eğitim öğretim yılında gerçekleştirilmiştir. Veri toplama aracı olarak 8 açık uçlu sorudan oluşan form uygulanmıştır. Verilerin analizinde nitel veri analizi teknikleri kullanılmıştır. Verilerin çözümlenmesinde Gökkurt, Şahin, Soylu ve Soylu’nun (2013) temaları ve kodları kullanılarak betimsel analiz yapılmıştır. Çalışma sonucunda, öğretmen adaylarının ölçüler konusuna ilişkin öğrenci hatalarını çoğunlukla tespit edebildikleri ve genellikle öğrenci hatalarının giderilmesine ilişkin yapılandırmacı yaklaşıma dayalı yöntem, teknik ve stratejileri benimsedikleri görülmüştür.
Ortaokul 7. Sınıf Öğrencilerinin En Büyük Ortak Bölen ve En Küçük Ortak Kat Konusundaki Bilgi Oluşturma Süreçlerinin RBC+C Modeli ile İncelenmesi
Authors: ÇUBUKLUÖZ Özlem , ADIGÜZEL Tuba , GÖKKURT ÖZDEMİR Burçin , AKKAYA Recai
Published: November 2019

Bu çalışmanın amacı, 7.sınıf öğrencilerinin
tasarlanmış bir öğrenme ortamında en büyük ortak bölen ve en küçük ortak kat
(ebob-ekok) bilgisini oluşturma süreçlerinin RBC+C soyutlama modeli ile
incelenmesidir. Çalışma grubu, bir devlet ortaokulunda öğrenim gören altı 7.
Sınıf öğrencisinden oluşmaktadır. Bilgi oluşturma süreci, nitel araştırma
yöntemlerinden, yorumlayıcı yaklaşımı temel alan öğretim deneyi yöntemi ile
incelenmiştir. Öğrencilerin ebob-ekok bilgisine ulaşma süreçleri tanıma,
kullanma, oluşturma, pekiştirme bilişsel eylem adımlarına göre
değerlendirilmiştir. Veri toplama aracı olarak araştırmacılar tarafından her
bir eylem adımı kapsamında araştırma problemleri hazırlanmıştır. Araştırmanın
sonucunda, öğrencilerin ebob-ekok kavramlarını etkinlik sonunda yapılandırdıkları
gözlemlenmiştir.
Öğretmenlerinin Performans Görevlerine Bakışları: Hizmet İçi Eğitim Almış Zümre Başkanları Örneği
Authors: CANSIZ-AKTAŞ Meral
Published: November 2019

Bu araştırmanın amacı, hizmet içi eğitim almış olan öğretmenlerin performans görev konularının belirlenmesi, öğrencilerin izlenmesi ve değerlendirilmesi süreci ile ilgili görüş ve deneyimlerini incelemektir. Durum çalışması yönteminin kullanıldığı çalışmanın örneklemini on öğretmen oluşturmaktadır. Veriler görüş formu ile toplanmış ve içerik analizi ile analiz edilmiştir. Çalışmanın sonucunda, öğretmenlerin performans görevlerini daha çok ders içerisinde anlatılan konular ve kazanımları dikkate alarak belirledikleri ancak performans görevi olarak verilen bazı örneklerin anlatılan konulara uygun olmasına rağmen performans görevi niteliği taşımadığı anlaşılmıştır. Ayrıca öğretmenlerin performans görevlerinin hem öğrenciye ve hem de öğretmene bazı olumlu katkılar sağladığı yönünde görüşlere sahip oldukları sonucuna varılmıştır.
An Examination of Middle School 7th Grade Students’ Mathematical Abstraction Processes
Authors: KILIÇOĞLU Elif , KAPLAN Abdullah
Published: November 2019

In this study, abstraction processes of 7th grade students were examined. In addition, it has been tried to explain how the implementation of this process affects the students' academic success. For this purpose, the experiment and control groups were formed. While the current teaching program was applied to the control group, the experimental group was taught with the ACE teaching cycle which is the application dimension of the theory based on the abstraction philosophy. It can be stated that such a study is shaped according to semi-experimental method. The application was carried out in the 7th grade of a state secondary school in the province of Erzurum in the 2014-2015 academic year, with a total of 31 students in the experimental group and 32 students in the control group. Both quantitative and qualitative data were obtained in the study. The achievement tests developed by the researcher for the quantitative data and the interview forms developed by the researcher for the qualitative data were used as data collection tools. In addition, the application in the experimental group was recorded with the help of a camera for later review and these records were used for support of qualitative data. The involvement of the researcher as a participant in the process provided the opportunity to obtain observation notes, and these observation notes were added to the qualitative dimension of the study. Therefore, in this study, it was tried to provide reliability by data diversity. The analysis of the quantitative data was done by statistical tests and the analysis of the qualitative data was done by descriptive analysis method. At the end of the research, it is seen that students’ abstraction level of the equation subject is better in the group that ACE teaching cycle is applied than the other group. Furthermore, it is seen that teaching in application process keeps the students’ interest and motivation alive. According to the results obtained it can be said that classroom activities based on students’ abstraction process may be necessary for a qualified learning.
Phenomenon-Based Learning for Teaching ICT Subject through other Subjects in Primary Schools
Authors: WAKIL Karzan , RAHMAN Rupak , HASAN Dana , MAHMOOD Pakhshan , JALAL Trifa
Published: November 2019

Due to the lack of practical usage of the
learned subject, traditional learning is becoming an obstacle in front of
further knowledge gaining. Classical learning methods are out-dated for the
modernized world that required more productive, collaborative, and more curious
individuals. Therefore, a new learning method is essential to provide knowledge
and skills to pursue world development without falling behind. The purpose of
this study is to find the positive effects of using Phenomenon-Based Learning
(PhenoBL) as a studying approach in teaching ICT skills to students and its
impact on giving the motivation and improving ICT skills for students at
primary schools of Sulaimani city in Iraq. The key method is to teach ICTs
through other classes with a universal as PhenoBL, the cross-curricular
approach which is built into the classes. Then, a survey is established to
uncover the reason behind making students learn about the ICT from places other
than school and shortage in keeping those skills in student’s mind for a longer
time. Our results showed that using Phenomenon-based learning students’ scores
are improved by more than 10% which makes using this method significantly
effective. Furthermore, using phenomenon-based learning allows the student to
keep and maintain gained skills for longer periods of time.
Üç Aşamalı Kavram Tanı Testi Geliştirme Çalışması: 5. Sınıf Canlılar Dünyasını Gezelim Tanıyalım Ünitesi
Authors: AYMEN PEKER Evşen , TAŞ Erol
Published: November 2019

Bu çalışmanın amacı, 5. sınıf fen bilimleri dersi “Canlılar Dünyasını Gezelim ve Tanıyalım” ünitesine yönelik; öğrencilerin ünite ile ilgili başarı düzeyleri ve sahip oldukları kavram yanılgılarının tespit edilmesini sağlayacak geçerli ve güvenilir bir üç aşamalı kavram tanı testi geliştirmektir. Geliştirilen test, Samsun il merkezinde bulunan üç ortaokulda, beşinci sınıfta öğrenim gören 210 öğrenciye uygulanmıştır. Toplam 23 maddeden oluşan üç aşamalı kavram tanı testi için geçerlilik güvenirlik çalışması yapılmıştır. Kavram tanı testinin güvenirliği birinci aşama sorularının analizinden KR-20 formülü ile hesaplanmış ve 0,80 olarak bulunmuştur. Üç madde birlikte değerlendirildiğinde testin güçlük ve ayırt edicilik değerleri sırasıyla pj: 0.47 ve rjx: 0.52 olarak hesaplanmıştır. Bu veriler geliştirilen testin güvenilir, orta güçlükte ve çok iyi maddelerden oluşan bir yapıya sahip olduğunu göstermektedir.
Game, Environment and Peer Effect on Children on the Digital Gaming Habits in Game Arcades
Authors: ASLAN Alper , TURGUT Yiğit Emrah , KARAKUŞ YILMAZ Türkan
Published: November 2019

Game arcades that have
turned into an important socialization area for children in Turkey, can affect
children in many ways. The aim of the study is to investigate the factors that
affect the digital game habits of children and young people in game arcades. In
this context, the effect of game, environment and peers on the habits of
children that are gaming in game arcades were investigated. Qualitative
research method was preferred in the study. The study group consisted of 50
male and 2 female participants randomly selected from four game arcades.
Semi-structured interview form was developed as a data collection tool and
individual interviews were conducted with the children participating in the
research. The findings show that children prefer digital games because they
find it amusing, fun, enjoyable and exciting. Together with the changing game
structure, it has emerged that multi-player online games affect the usage of
game arcades of children. Children stated that they prefer to play in game
arcades because they can be with their friends and there is no parental
supervision. It was determined that children knew these environments through their
friends and would not prefer these environments without their friends. Based on
these findings, it was concluded that multi-player online games had an effect
on the habits of children on using game arcades due to its facility of
socialization with friends and playing without any restrictions.
Öğretmenler Etik Davranıyor mu? Öğretmenlerin Meslektaşları Hakkındaki Algılarının İncelenmesi
Authors: SARIDAŞ Gürkan , YILDIRIM Özen
Published: November 2019

Öğretmenin mesleki etik davranması kendisini rol
model alan öğrencinin her yönden gelişimi için önemlidir. Araştırma kapsamında
geçerli ve güvenilir bir ölçek geliştirilmesi amaçlanmıştır. Araştırmanın
örneklemini Denizli ilinde görev yapan 394 ortaokul öğretmeni oluşturmaktadır.
Ayrıca ölçeğin doğrulayıcı faktör analizi için 276 kişilik ortaokul
öğretmeninden veri toplanmıştır. Verilerin analizinde temel bileşenler analizi,
doğrulayıcı faktör analizi kullanılmış ve diğer güvenirlik kanıtları
hesaplanmıştır. Öğretmenlerin algıları arasındaki farklılaşmayı ortaya koymak
için betimsel istatistiklerden, bağımsız örneklemler t-testi ve tek yönlü ANOVA
analizinden yararlanılmıştır. Araştırmanın sonuçlarına göre tek boyutlu bir
yapıya sahip geçerli ve güvenilir bir ölçek geliştirilmiştir. Öğretmenlerin
algıları, meslektaşlarının okul içinde ve dışında etik davrandığı yönündedir.
Ayrıca bu algıların cinsiyete ve kıdeme göre farklılaştığı belirlenmiştir.
Improving Mathematical Reasoning and Mathematics Attitude of Disadvantaged Children in Rural Regions
Authors: ERDEM Emrullah , FIRAT Tahsin , GÜRBÜZ Ramazan
Published: November 2019

This
study aims at examining the effects of an enriched learning environment on
improving Mathematical Reasoning (MR) and Mathematics Attitude (MA) of
disadvantaged children (11-and 12-year-olds). The participants were 5th
graders (N = 17) and 6th graders (N = 18) who were studying in a
rural school in a province of Turkey. The data were obtained via Mathematical
Reasoning Test (MRT), Mathematics Attitude Scale (MAS), and groups
argumentation. A Wilcoxon Signed Rank test was used to reveal the pre/post-test differences. Statistical
comparisons of the MR and MA were also made by using the tests’ mean scores.
There is evidence from the environment that the MR of both groups was
significantly developed but grade/age did not have a significant effect
on MR. The study found that the MA of both groups improved after the
intervention, but these improvements were not statistically significant. No
significant effect was determined regarding age on the improvement of MA. This
research has shown that the MR and MA of children of such disadvantaged rural
regions can improve when rich learning environments are designed.
DescomposiciÃ³n lagrangiana para resolver el problema de localizaciÃ³n de la p-mediana generalizado
Authors: Montes Giancarlo , Rojas Jenny
Published: November 2019

En el presente artÃ­culo se utiliza el mÃ©todo de descomposiciÃ³n lagrangiana para resolver el problema de localizaciÃ³n de la p-mediana generalizado. Se describe e interpreta geomÃ©tricamente la relajaciÃ³n lagrangiana y la descomposiciÃ³n lagrangiana. Se desarrolla un algoritmo heurÃ­stico basado en la descomposiciÃ³n lagrangiana para hallar la soluciÃ³n del problema en estudio y se analiza los resultados computacionales del mÃ©todo de descomposiciÃ³n lagrangiana y relajaciÃ³n lagrangiana mÃ¡s optimizaciÃ³n subgradiente para resolver el problema de localizaciÃ³n de la pmediana generalizado, mostrando la superioridad en tiempo de ejecuciÃ³n de la descomposiciÃ³n lagrangiana versus la relajaciÃ³n lagrangiana.
El MÃ©todo de los elementos finitos en problemas de vigas
Authors: Lara Romero Luis
Published: November 2019

En este artÃ­culo presentamos la aplicaciÃ³n del mÃ©todo de los elementos finitos para determinar las deformaciones verticales, deformaciones de giro, fuerzas y momentos de los elementos de una viga en voladizo y empotrada. Se muestra como se aplica los elementos barra a un problema de viga en voladizo para determinar las deformaciones en vertical y los Â´Ã¡ngulos de giro. Se aplica elementos tipo armadura un problema de viga doblemente empotrada sometida a una fuerza axial y a un problema de una viga elÃ¡stica.

Palabras clave: Elemento finitos, Refinamiento, Malla adaptativa.