bluuebunny/crossref_metadata_2025 huggingface dataset:
Análise do escoamento em poços horizontais injetores completados com a técnica de furação diversiva
Authors: Mantegazini Isabela Silva , Romero Oldrich Joel
Published: June 2019

A depender de sua magnitude, as perdas de carga devido ao atrito podem influenciar significativamente o perfil de fluxo em poços horizontais injetores. Perfis de fluxo não-uniformes são responsáveis pela perda da injetividade e pela diminuição da eficiência de varrido, que são efeitos indesejados na recuperação de petróleo. Neste contexto, a técnica de furação diversiva, analisada neste trabalho, é proposta para uniformizar o perfil de fluxo através da distribuição diferenciada dos furos ao longo do liner, que é um tubo metálico utilizado na completação. O presente trabalho utiliza uma tubulação horizontal com furação diferenciada para analisar o escoamento em poços horizontais injetores completados com a técnica de furação diversiva, destacando os efeitos das forças inerciais e viscosas sobre o perfil de perda de carga e, consequentemente, sobre o perfil de fluxo. A solução das equações é obtida com auxílio do software da família Ansys 15.0 para cinco cenários com diferentes viscosidade do fluido injetado. Os resultados demonstram que o perfil de fluxo utilizando a furação diversiva do liner segue a tendência da perda de pressão ao longo da seção horizontal do poço. Observa-se também que o domínio das forças inerciais resultou em perfis de fluxo mais uniformes e, por consequência, maior injetividade, enquanto que o domínio das forças viscosas resultou em baixa influência dos efeitos hidráulicos.
Um relato sobre a incorporação de textos originais para a educação matemática – de Isabelle Coelho da Silva
Authors: Lira Arianny de Sousa , Silva Alison Sousa da , Bezerra Francisco Hedyleno Coelho , Paiva Tácito Trindade de , Vasconcelos Ana Karine Portela
Published: June 2019

Este relato trata-se de uma resenha da dissertação de mestrado acadêmico, “Um estudo da incorporação de Textos Originais para a Educação Matemática: buscando critérios na articulação entre história e ensino”, apresentado ao Programa de Pós-Graduação em Ensino de Ciências e Matemática do Instituto Federal de Educação, Ciência e Tecnologia do Estado do Ceará (IFCE). A temática emerge sobre a importância de investigar o uso de um documento original para o ensino de matemática, o Papiro de Rhind, elaborando atividades para serem aplicadas no ensino médio. A pesquisa teve abordagem metodológica qualitativa, bibliográfica, e um estudo documental a partir de coletas de dados. Dentre as contribuições advindas do processo, destacou-se a abordagem dos critérios usados para inserir a história da matemática no contexto de sala de aula. Como conclusão observamos à necessidade do conhecimento das perspectivas historiográficas e sobre os critérios para se tratar um documento original para o ensino. E a partir dos resultados, ressalta-se a importância da formação profissional sobre o tema.
WHEN FANS AND HATERS ARE ON THE SAME BOAT: A DECONSTRUCTIVE READING OF BOWO AND TIK TOK
Authors: Priyawan Pepen , Rusdianti Alisya , Nurfauziah Adinda , Asmarani Asmarani
Published: June 2019

This study analyses the viral impact of Bowo, a teenage celebrity from TikTok (a socialmedia site) as well as comments from netizens who happened to be Bowo’s fans orhaters. In addition, the study used theories of cultural studies from Derrida, Adorno andHorkheimer to analyze the entertainment industry as well as netizens, both fans andhaters of Bowo. The role and judgments of fans and haters of Bowo will be shown to seethe paradoxes and parallel of this phenomenon. Thus, the study applied a descriptivequalitative method to analyze data. The results indicate that although netizens know thatwhat they see in TikTok may be fabricated, some netizens still felt deceived by Bowo’sappearances in TikTok. Those feelings were shown in their comments in social media. Inaddition to feeling deceived, the results show how female teenagers who engaged inonline discussions regarding Bowo seemed torn into adoring and abhorring Bowo.
STRATEGI PROGRAM RADIO DALAM MEMPERTAHANKAN EKSISTENSINYA
Authors: Rahayu Tresna Yumiana , Dewi Katili Kartini Rosmalah
Published: June 2019

Umumnya, program hiburan lebih banyak disajikan radio dan disukai oleh pendengar. Maka tidaklah mudah bagi stasiun radio dengan format khusus untuk menyiarkan programkeagamaan agar dapat diterima dengan baik. Kajian Tematik adalah salah satu program dakwahyang mampu bertahan sejak 2005 hingga sekarang. Dalam hal ini, tentunya dibutuhkan strategiyang tepat bagi program tersebut untuk mempertahankan eksistensinya di Radio Rodja 756 AM.Penelitian ini bertujuan untuk mengetahui strategi program Kajian Tematik dalammempertahankan eksistensinya dengan menggunakan konsep strategi program Peter Pringleyang terdiri dari perencanaan, produksi dan pembelian, eksekusi, serta pengawasan danevaluasi. Metode penelitian yang digunakan adalah kualitatif deskriptif. Berdasarkan hasilpenelitian, ada enam hal pokok dalam strategi program Kajian Tematik untuk mempertahankaneksistensinya. Pertama, adanya ilmu atau informasi keagamaan dalam setiap tema yangdihadirkan secara aktual. Kedua, narasumber yang berkompeten dalam bidangnya. Ketiga,mengumpulkan ide melalui angket, media sosial, dan diskusi. Keempat, melakukan inovasidengan menyelenggarakan kegiatan off air, promosi melalui media sosial dan secara word ofmouth, membuat jadwal siaran, dan memaksimalkan potensi. Kelima, konsisten dalam ciri khas,yaitu nama dan kemasan program. Keenam, perluasan distribusi program melalui radio analog,streaming, satelit, dan relay. Penulis merekomendasikan untuk penelitian selanjutnya mengenaieksistensi media menggunakan teori niche (ekologi media).
Olasılığın Romeo’su ve Juliet’i
Authors: KORKMAZ Adil
Published: June 2019

Olasılık gündelik dilde olduğu gibi olasılık felsefesinde de iki farklı anlamda kullanılır: Öznel olasılık ve nesnel olasılık. Kimi filozoflara göre gerçek olasılık öznel olasılıktır. Bu olasılık bir ilerisürüme duyulan inanç düzeyini yansıtan bir ölçüdür. Söz konusu ölçü, ilerisürüme tam inanılması durumunda 1, hiç inanılmaması durumunda 0, eşit ölçüde olmak üzere biraz inanılıp biraz inanılmaması durumunda ise 0.5 olur. Kimi filozoflar bu olasılığı gerçek olasılık biçiminde değerlendirmezler. Onlara göre gerçek olasılık nesnel olasılıktır. Nesnel olasılık bir denemedeki herhangi bir sonucun olmaktaki kolaylık düzeyini yansıtan bir ölçüdür. Olmaktaki kolaylık soyuttur ve bu nedenle de uzun dönemdeki göreceli sıklık ile somutlaştırılır. Buna göre bir denemedeki bir sonuca ilişkin nesnel olasılık söz konusu sonuç denemelerin hepsinde gerçekleşiyorsa 1, hiçbirinde gerçekleşmiyorsa 0, yarısında gerçekleşip yarısında gerçekleşmiyorsa ½ olur. Bu çalışma, olasılığın Romeo’su ve Juliet’i diye adlandırılabilecek yukarıdaki olasılık anlamlandırmalarını, olasılık kuramı tarihini dört döneme ayırarak incelemeyi amaçlamaktadır
Preliminary Study: Application of Spot-mapping Technique for Estimating the Size of Oriental Magpie Robin Cospychus saularis (Aves: Muscicapidae) Territories in Universiti Malaysia Sarawak (UNIMAS)
Authors: LUKING KATHLEEN MICHELLE , GAWIN DENCY FLENNY , MENTIE JESSIE
Published: June 2019

Breeding territoriality plays a role in determining the reproduction outcome of many passerines species. The spot-mapping was used to estimate the breeding territory size of a territorial male of Oriental Magpie robin (Cospychus saularis) at Dahlia College, Universiti Malaysia Sarawak which is located within Kota Samarahan. It was conducted by mapping the song perching locations established by a marked male. The breeding territory size of the male was estimated to be 0.78 hectares. The data analysis was done using Minimum Convex Polygon (MCP) which was constructed by using Google Earth Pro software. Study on breeding territory size of this bird species is crucial to understand more regarding the breeding behaviour of this species. Data on the behavior of this species could be used for future studies of this bird in Borneo.
Comparative Prevalence of Ectoparasitic Fauna on Birds from Selected Mainland and Island of Sarawak
Authors: RAJA AZIZI RAJA NUR ATIQAH , ADRUS MADINAH
Published: June 2019

A survey of ectoparasitic fauna on birds was conducted in October 2017 until January 2018. The aims of this study were to investigate the ectoparasitic fauna on birds and to compare its prevalence in the selected mainland and island of Sarawak. A series of sampling by using mist-net has been done in Mount Sadong and Satang Besar Island with a total of 1440 hours of sampling effort for each locality. A total of 53 individuals of birds were captured and examined for its ectoparasites. Twenty-one species of ectoparasites were recorded comprising four species of lice and 17 species of mites. Four species of lice and 11 species of mites were detected in Mount Sadong while eight species of mites and no lice were detected in Satang Besar Island. The prevalence of ectoparasites infested on birds in Mount Sadong (33.33%) was higher than Satang Besar Island (17.39%). The p-value (p= 0.474) indicated there was no significant difference between the prevalence of ectoparasites from both localities. The result is important since ectoparasites infestation could affect the survival of birds and has the potential transmission of zoonotic disease.
Attendance Of Mass Media And Parents In Defining The Value Of Agriculture In The Eyes Of Rural (Case Study of Rural Youth at Horticulture Center in Cianjur Regency)
Authors: Valdiani Dini , Adinugraha Yogaprasta , Siregar Mariana R.A
Published: June 2019

The scarcity of human resources in the agricultural sector or the semi-forced involvement of most of agricultural labors due to the unavailability of other alternatives, has resulted in the unoptimized production process. The young peoples attitude toward farmer as a profession and its agriculture activity is affected by three major aspects, i.e. micro aspect (parents, friends, and mass media); messo aspect (the nearby community); and macro aspect (the society). This study investigates the micro aspect in building agricultural values on young people. The study used a descriptive qulitative approach to reveal the reality of value transfer from parents and also mass media to young people in rural area. The study finds that parents particularly the father as the main actor in transferring agricultural values to young people. Television is the most accessed mass media by young people. Young people still have the interest in working in the agricultural sector, not as a main job but as a side job.Keywords: attendance of mass media and parents, value of agriculture in the eyes of rural
Analysis of Satisfaction to The User of The Elementery Teacher Study Program Graduates Faculty of Teacher Training and Education, Pakuan University
Authors: Sukmanasa Elly , Novita Lina , Sundari Fitri Siti
Published: June 2019

This research uses qualitative approach. The problem in this research is that students of PGSD graduates still have to deepen their mastery of English, lack of implementing the use of technology and information tools, and lack of expertise in self-development field. User satisfaction of graduates can be measured from 7 (seven) aspects of the ability of PGSD graduate in the field. The seven aspects are integrity (ethics and morals), professionalism (expertise by field), English, information technology skills, communication, teamwork, and self-development. User satisfaction graduates produce good values in six aspects (85.7%), namely aspects of integrity, professionalism, communication, use of information technology, teamwork, and self-development. While as much as one aspect (14.3%) the results are quite good. This aspect is English proficiency. This indicates that the study program must be really serious in improving the English language skills of PGSD students to be able to learn it better. Good listening, writing, speaking, and grammar skills.Keywords: satisfaction, users, students
The Role Of Transformational Leadership In Improving Job Satisfaction
Authors: Rianty Ida
Published: June 2019

The purpose of this study to determine the role of Transformational Leadership in increasing Job Satisfaction. The samples have been taken by random sampling technique selecting amounted to 249 samples from permanent lecturers of private Islamic High School in Jambi Province. This research uses a Sequential Explanatory Design Mixed Method that is first research using a quantitative method then deepen it with a qualitative method. This is intended to result in more in-depth and comprehensive research.The result shows that there is a positive correlation between transformational leadership which has a high effect on job satisfaction of the lecturers. The coefficient correlation is ry = 0,483 and coefficient determination ry = 0,233. It means that 65.90% of job satisfaction is influenced by transformational leadership, and the rest of it influenced by other factors.
EFFECTIVENESS OF THE USE OF MAP MEDIA AGAINST SPATIAL LITERACY OF CLASS V ELEMENTARY SCHOOL STUDENTS IN SOCIAL STUDIES (IPS) LEARNING
Authors: Prastya Dicky , Maharani Winda
Published: June 2019

This research is motivated by the lack of utilization of the media in conducting learning related to space, making spatial literacy of students less explored. In addition, students tend to be more passive and bored quickly when the teacher in delivering learning comes only from the student's textbook. The lack of understanding of students' spatial literacy, in the end causes students to be less careful in making decisions and also solving spatial problems that occur in everyday life. This research was conducted related to the effectiveness of media maps in social studies learning in class V students of elementary schools in Metro City. The purpose of this study was to provide an understanding of students' spatial literacy, especially in material related to space in social studies subjects. The type of this study is quasi-experimental research using the design of nonequivalent groups pre test-post test from Fraenkel and Wallen. The design of nonequivalent groups pre test - post test was started by setting the experimental group and the control group, then doing the pre test, followed by giving treatment to the two classes and ending with a post test. The subjects in this study were fifth grade elementary school students in Metro City. Data collection techniques in the form of tests. The research instrument is a spatial literacy test sheet. Data were analyzed using normality test and Mann Whitney test. The results of this study indicate that the effectiveness of using media maps in social studies learning can provide an understanding of spatial literacy of fifth grade elementary school students in Metro City. This can be seen from the increase in the correct number of each indicator of spatial literacy that is given in the form of determining the location, identifying spatial orientation, determining the closest distance and identifying objects through symbols on the map. The results of this study can be a suggestion for teachers and schools to continue to facilitate social studies learning with appropriate media, especially media maps for material related to space, so as to provide students with more understanding of spatial literacy. Keywords: media map, spatial literacy, elementary students
ANALYSIS OF SOCIAL INTERACTION OF MENTALLY RETARDED CHILDREN
Authors: Suchyadi Yudhie , Ambarsari Yulia , Sukmanasa Elly
Published: June 2019

Differences in the characteritics of children with special needs will require the ability of teachers to combine various abilities and talents of each child, such as mentally retarded children who need communication like children in general. His developmental delays are often excluded from his playing enviranment, thus the need for good social interaction with mentally retarded children. Based on these problems, a study was conducted to describe the findings of social interaction in mentally retarded children in extraordinary school Mentari Kita. The research is a descriptive analysis with qualitative research approach. Technique of data analysis was performed with data reduction stage, the presentation of data, and verification (conclusions). Researchers used the test of credibility, transferabilitas, dependabilitas, and konfirmabilitas to obtain the validity of the data. The result showed that the way social interaction with mental retardation children how do social contacts and communication as being able to respond when invited to communicate but it should be repeated over and over,the subject has a weakness in the concentration of so when invited to talk hard staring at your opponents interlocutor. When did the subject communication using language that sounds stilted. Social contact subject well againts his peers is characterized by sensitivity to her friends when in distress, want to help his friend like get a pencil, and divide the food per day taken by subject. Based on the above research result it can be concluded that the way the social interactions of the child with mental retardation how do social contacts and communication in accordance with the terms of the occurrence of social interaction. Keywords: Social Interaction, Mental Retardation
Genotyping by Sequencing and Plastome Analysis Finds High Genetic Variability and Geographical Structure in Dactylis glomerata L. in Northwest Europe Despite Lack of Ploidy Variation
Authors: Hodkinson Trevor , Perdereau Aude , Klaas Manfred , Cormican Paul , Barth Susanne
Published: June 2019

Large collections of the forage and bioenergy grass Dactylis glomerata were made in northwest (NW) Europe along east to west and north to south clines for genetic resource conservation and to inform breeding programmes of genetic diversity, genepools, and ploidy. Leaves were sampled for genetic analysis and seed and rhizome for ex-situ conservation. Genotyping by sequencing (GBS) was used to assay nuclear DNA diversity and plastome single nucleotide polymorphism (SNP) discovery was undertaken using a long-read PCR and MiSeq approach. Nuclear and plastid SNPs were analysed by principal component analysis (PCA) to compare genotypes. Flow cytometry revealed that all samples were tetraploid, but some genome size variation was recorded. GBS detected an average of approximately 10,000 to 15,000 SNPs per country sampled. The highest average number of private SNPs was recorded in Poland (median ca. 2000). Plastid DNA variation was also high (1466 SNPs, 17 SNPs/kbp). GBS data, and to a lesser extent plastome data, also show that genetic variation is structured geographically in NW Europe with loose clustering matching the country of plant origin. The results reveal extensive genetic diversity and genetic structuring in this versatile allogamous species despite lack of ploidy variation and high levels of human mediated geneflow via planting.
Motivation of Owners to Purchase Pedigree Cats, with Specific Focus on the Acquisition of Brachycephalic Cats
Authors: Plitman Liran , Černá Petra , Farnworth Mark J. , Packer Rowena M.A. , Gunn-Moore Danièlle A.
Published: June 2019

Background: Cats are globally popular pets and pedigree cats are increasingly prevalent, with brachycephalic breeds being the most registered breeds. How owners decide upon and acquire their cats is poorly understood. Moreover, there are growing concerns about the health and welfare of brachycephalic (BC) dogs and recent studies are raising the awareness of health and welfare problems in BC cats. Methods: An online survey investigated owners’ motivations, perceptions and behaviours prior to, during and following acquisition of non-pedigree (NP), extreme brachycephalic pedigree (BC; i.e., Persian and Exotic Shorthair) and mild to non-BC pedigree (P) cats. Results: The survey received 1367 valid responses (NP n = 882, P n = 400, BC n = 85 (6.2%)). There were marked differences between NP, P and BC owners’ perception of their cats’ health and welfare, reason(s) for acquisition and its process. Owners of NP were less influenced by appearance, behaviour and other features than P or BC owners. In contrast, P and BC owners were highly influenced by appearance, with P owners also placing greater importance on good breed health than BC owners. BC owners were less likely to recommend their breeds to prospective cat owners, apparently concerned by high maintenance requirements. Conclusion: Further research is needed to determine how decision-making is constructed and how it may be improved, especially in respect of welfare outcomes for extreme BC cats given the increased weighting given to appearance over health.
Avoidance Distance in Sheltered Cows and Its Association with Other Welfare Parameters
Authors: Sharma Arvind , Phillips Clive J. C.
Published: June 2019

The human–animal relationship is an important welfare parameter in animal welfare assessment in cows, and the avoidance distance of cows to a stranger at the feed bunk is measured to assess this relationship. The assessment of the human–animal relationship in cow shelters in India, where old, unproductive, and abandoned cows are sheltered, is important to explore the welfare of cows in these shelters. The cows observed were of indigenous Indian breeds and breeds which were crosses between indigenous breeds and pure bred exotic cows. The human–animal contact in this context is of particular interest for welfare assessment as traditional Indian farming and sheltering systems involves regular close human–animal contact. In a cross-sectional study across 6 states, 54 cow shelters were visited and 30 cows in each shelter were randomly selected (1620 in total) for the assessment of avoidance distance and other cow-based (27 parameters) and resource-based (15 parameters) welfare parameters. Avoidance distance was assessed 1 h after morning feeding. Cows standing at the feeding manger were approached from the front at a rate of one step/s, starting 2 m away from the manger. The distance between the assessor’s hand and the cow’s head was estimated at the moment the cow moved away and turned its head, using a four-point scale (0, touched; 1, 0–50 cm; 2, 51–100 cm; and 3, >100 cm). The majority, 52%, of the cows allowed touch by the assessor and another 32% allowed approach within 50 cm, demonstrating tolerance, or even solicitation of close human–animal relationships by the cows. Avoidance distance increased with the proportion of cows with dirty hind limbs, tarsal joint swellings, and hair loss, and the extent of rumen fill. There was also evidence of reduced avoidance distances in cows with high levels of body condition score (BCS), dirty flanks, tarsal joint ulceration, carpal joint injuries, diarrhoea, hampered respiration, lesions on the body due to traumatic injuries, and body coat condition, probably as a result of moving difficulties. The avoidance distance was thus related to the health and welfare of the cows, providing a vital insight into the factors affecting human–animal contact in the shelters.
Optimization of Ultrasound-Assisted Extraction of Antioxidant Polyphenols from the Seed Coats of Red Sword Bean (Canavalia gladiate (Jacq.) DC.)
Authors: Zhou Yue , Xu Xiao-Yu , Gan Ren-You , Zheng Jie , Li Ya , Zhang Jiao-Jiao , Xu Dong-Ping , Li Hua-Bin
Published: June 2019

The seed coat of red sword bean (Canavalia gladiata (Jacq.) DC.) is rich in antioxidant polyphenols. It is often discarded as a byproduct with the consumption of red sword bean, since it is very thick and not consumed by people. The aim of this study was to develop an ultrasound-assisted extraction method to extract natural antioxidants from the seed coats. The extraction process was optimized by using response surface methodology. After the single-factor experiments, three key factors, including ethanol concentration, liquid/solid ratio, and extraction time, were selected and their interactions were studied using a central composite design. The optimal extraction condition was 60.2% hydroethanol, a liquid/solid ratio of 29.3 mL/g, an extraction time of 18.4 min, an extraction temperature of 50 °C, and ultrasound power of 400 W. Under the optimal conditions, antioxidant activity of the extract was 755.98 ± 10.23 μmol Trolox/g dry weight (DW), much higher than that from maceration (558.77 ± 14.42 μmol Trolox/g DW) or Soxhlet extraction (479.81 ± 12.75 μmol Trolox/g DW). In addition, the main antioxidant compounds in the extract were identified and quantified by high-performance liquid chromatography–diode array detection–tandem mass spectrometry (HPLC–DAD–MS/MS). The concentrations of digalloyl hexoside, methyl gallate, gallic acid, trigalloyl hexoside, and digallic acid were 15.30 ± 0.98, 8.85 ± 0.51, 8.76 ± 0.36, 4.27 ± 0.21, and 2.89 ± 0.13 mg/g DW. This study provides an efficient and green extraction method for the extraction of natural antioxidants from the bean coat of red sword bean. The extract of antioxidants might be added into functional foods or nutraceuticals with potential beneficial functions.
Effect of Sterigmatocystin or Aflatoxin Contaminated Feed on Lipid Peroxidation and Glutathione Redox System and Expression of Glutathione Redox System Regulatory Genes in Broiler Chicken
Authors: Balogh Krisztián , Kövesi Benjámin , Zándoki Erika , Kulcsár Szabina , Ancsin Zsolt , Erdélyi Márta , Dobolyi Csaba , Bata-Vidács Ildikó , Inotai Katalin , Szekeres András , Mézes Miklós , Kukolya József
Published: June 2019

Authors studied the effect of sterigmatocystin from infected corn (STC), purified sterigmatocystin (PSTC), and aflatoxin B1 from infected corn (AFB1) on lipid peroxidation and glutathione redox parameters, including the expression of their encoding genes in a sub-chronic (14 days) trial. A total of 144 three-week-old cockerels was divided into four experimental groups (n = 36 in each). Control feed was contaminated with STC or PSTC (1590 µg STC/kg or 1570.5 µg STC/kg feed), or with AFB1 (149.1 µg AFB1/kg feed). Six birds from each group were sampled at day 1, 2, 3, 7 and 14 of mycotoxin exposure. As parameters of lipid peroxidation, conjugated dienes (CD) and trienes (CT) were measured in the liver, while malondialdehyde (MDA) concentration was determined in blood plasma, red blood cell hemolysate and liver. Reduced glutathione (GSH) concentration and glutathione peroxidase (GPx) activity were determined in the same samples, and expression of glutathione peroxidase 4 (GPX4), glutathione synthetase (GSS) and glutathione reductase (GSR) genes was measured by RT-PCR in the liver. STC, PSTC or AFB1 caused a slight, but not significant, increase in CD and CT levels; however, in the case of MDA, no increase was found in the liver. Glutathione redox system was activated in the liver by AFB1, but less markedly by STC/PSTC. PSTC and AFB1 resulted in a higher expression of GPX4, while GSS expression was down-regulated by AFB1 on day 1, but up-regulated by STC on day 2 and by both mycotoxins on day 7. However, on day 14, GSS expression was down-regulated by PSTC. Expression of GSR was low on day 1 in AFB1 and PSTC groups, but later it was up-regulated by AFB1. The observed changes regarding gene expression strengthen the hypothesis that the mild oxidative stress, caused by the applied STC doses, activates the glutathione redox system of broiler chickens.
Evaluation of Dynamic Soil-Pile-Structure Interactive Behavior in Dry Sand by 3D Numerical Simulation
Authors: Kwon Sun Yong , Yoo Mintaek
Published: June 2019

A 3D numerical model based on finite-difference approximation was formulated to predict the dynamic soil-pile-structure interaction (SPSI) in dry sand. A non-linear elastic, Mohr–Coulomb plastic soil-constitutive model was adopted for the proposed methodology with a hysteretic damping model which can simulate nonlinear behavior of soil and an interface model which can predict separation and slippage between soil and pile according to the external load condition. Simplified continuum model was used to properly simulate the semi-infinite boundary and improve analysis efficiency. The proposed numerical model was validated by comparison with experimental results performed by Yoo (2013). Thereafter, a parametric study was also carried out to investigate the complex dynamic behavior of pile foundation under varying conditions. It was demonstrated that inertial force induced by superstructure is dominant for dynamic SPSI in dry sand whereas the kinematic force induced by soil deformation is relatively insignificant. Pile peak bending moment occurs at 30% of the pile length when pile length is no longer than 5 T and at about 30% of 5 T (1.6 T) when the pile length is longer than 5 T. The pile head fixity governed the peak bending moment profile of pile and affected the dynamic responses of the system in conjunction with other factors, such as pile rigidity.
Hybrid Ionic Liquid–Silica Xerogels Applied in CO2 Capture
Authors: S. Aquino Aline , O. Vieira Michele , Ferreira Ana Sofia D. , Cabrita Eurico J. , Einloft Sandra , O. de Souza Michèle
Published: June 2019

The imidazolium-based ionic liquids (ILs) are solvents known for selectively solubilizing CO2 from a gas CH4/CO2 mixture, hence we have produced new hybrid adsorbents by immobilizing two ILs on xerogel silica to obtain a solid–gas system that benefits the ILs’ properties and can be industrially applied in CO2 capture. In this work, the ILs (MeO)3Sipmim.Cl and (MeO)3Sipmim.Tf2N were used at different loadings via the sol–gel process employing a based 1-methyl-3-(3-trimethoxysylilpropyl) imidazolium IL associated to the anion Cl− or Tf2N− as a reactant in the synthesis of silica xerogel. The CO2 adsorption measurements were conducted through pressure and temperature gravimetric analysis (PTGA) using a microbalance. SEM microscopies images have shown that there is an IL limit concentration that can be immobilized (ca. 20%) and that the xerogel particles have a spherical shape with an average size of 20 µm. The adsorbent with 20% IL (MeO)3Sipmim.Cl, SILCLX20, shows greater capacity to absorb CO2, reaching a value of 0.35 g CO2 / g adsorbent at 0.1 MPa (298 K). Surprisingly, the result for xerogel with IL (MeO)3Sipmim.Tf2N shows poor performance, with only 0.05 g CO2 / g absorbed, even having a hydrophobic character which would benefit their interaction with CO2. However, this hydrophobicity could interfere negatively in the xerogel synthesis process. The immobilization of ionic liquids in silica xerogel is an advantageous technique that reduces costs in the use of ILs as they can be used in smaller quantities and can be recycled after CO2 desorption.
Accelerated Correction of Reflection Artifacts by Deep Neural Networks in Photo-Acoustic Tomography
Authors: Shan Hongming , Wang Ge , Yang Yang
Published: June 2019

Photo-Acoustic Tomography (PAT) is an emerging non-invasive hybrid modality driven by a constant yearning for superior imaging performance. The image quality, however, hinges on the acoustic reflection, which may compromise the diagnostic performance. To address this challenge, we propose to incorporate a deep neural network into conventional iterative algorithms to accelerate and improve the correction of reflection artifacts. Based on the simulated PAT dataset from computed tomography (CT) scans, this network-accelerated reconstruction approach is shown to outperform two state-of-the-art iterative algorithms in terms of the peak signal-to-noise ratio (PSNR) and the structural similarity (SSIM) in the presence of noise. The proposed network also demonstrates considerably higher computational efficiency than conventional iterative algorithms, which are time-consuming and cumbersome.
Shaking Table Tests of Suspended Structures Equipped with Viscous Dampers
Authors: Cai Wenhua , Yu Bujun , Kaewunruen Sakdirat
Published: June 2019

In this study, a series of shaking table tests of a ten storey concrete suspended structure equipped with viscous dampers were carried out to evaluate the dynamic responses and vibration damping performance of suspended structures. The effects of link types between the primary structure and suspended floors and different seismic excitations on the response of suspended structure models was verified. The responses include the damping ratio, the frequency, maximum relative displacements, accelerations and maximum strains of the suspended structures. Test results showed that the damping ratio and the frequency of suspended structures installed with dampers (called damping suspended structure) are adjusted compared with a conventional suspended structure with rigid-bar links (conventional suspended structure). Maximum relative displacements of the primary structure of the damping suspended structure were distinctly smaller than those of the conventional suspended structure. However, the maximum relative displacement between the primary structure and the suspended floors of the damping suspended structure was significantly larger than that of the conventional structure, indicating that the swing of the suspended floor can help dissipate seismic energy. The peak acceleration and acceleration amplification factors of the damping suspended structure were less than the conventional suspended structure. Moreover, the peak acceleration response of the damping suspended structure was slightly behind the conventional suspended structure. The damping suspended structure certainly had a considerable and stable reduction for strain response, and the maximum strain response was decreased by 42.3%–72.7% for the damping suspended structure compared with the conventional suspended structure.
Waterproof Aerated Bricks from Stone Powder Waste through Nano-TiO2 Structured Hydrophobic Surface Modification
Authors: Li Tao , Zeng Shaopeng , Ji Yaxiong , Shen Boxu , Wang Zhuangmiao , Zhong Hong , Wang Shifeng
Published: June 2019

To eliminate the negative impacts of waste stone powder that arises from stone processing, the waste was recycled into aerated bricks with a porous structure that exhibited exceptional properties when applied in buildings. However, the pores easily absorb rainwater and dust, causing performance degradation and mold growth inside. In this paper, we have developed through hydrothermal reactions an environmentally friendly aqueous suspension, containing homemade highly dispersive TiO2 nanoparticles modified with super-hydrophobic groups on the surface. The suspension was coated onto the aerated bricks, creating a super-hydrophobic surface with a highly textured hierarchical structure. A large contact angle of 146° tested on the surface and negligible water absorption for 24 h immersion demonstrate the excellent water proofing performance, holding a great promise for large scale applications in construction and buildings.
Mass Collaboration and Learning: Opportunities, Challenges, and Influential Factors
Authors: Zamiri Majid , Camarinha-Matos Luis M.
Published: June 2019

Learning ecosystems can benefit from mass collaboration where large numbers of minds collectively drive intellectual efforts to learn in the form of knowledge building and sharing. Mass collaborative learning represents a significant shift away from traditional teacher-centered approach towards a self-directed model in virtual communities in which contributing members take on creative roles to maximize their learning and that of their peers. In order to design, implement, and exploit such a learning approach, influencing constituents should be identified, and appropriate conditions need to be provided. This study aims to systematically review recent literature with a view to identifying relevant affecting constituents and success factors for mass collaboration and learning—namely, the type of organizational structures, collaborative learning techniques, adopted technologies, and methods for evaluating the quality of both members’ performance, and co-created knowledge. Therefore, 100 related papers are collected, and their findings are critically evaluated. The results of evaluation are then addressed and discussed.
Path Planning for Multi-UAV Formation Rendezvous Based on Distributed Cooperative Particle Swarm Optimization
Authors: Shao Zhuang , Yan Fei , Zhou Zhou , Zhu Xiaoping
Published: June 2019

This paper studies the problem of generating cooperative feasible paths for formation rendezvous of unmanned aerial vehicles (UAVs). Cooperative path-planning for multi-UAV formation rendezvous is mostly a complicated multi-objective optimization problem with many coupled constraints. In order to satisfy the kinematic constraints, i.e., the maximum curvature constraint and the requirement of continuous curvature of the UAV path, the Pythagorean hodograph (PH) curve is adopted as the parameterized path because of its curvature continuity and rational intrinsic properties. Inspired by the co-evolutionary theory, a distributed cooperative particle swarm optimization (DCPSO) algorithm with an elite keeping strategy is proposed to generate a flyable and safe path for each UAV. This proposed algorithm can meet the kinematic constraints of UAVs and the cooperation requirements among UAVs. Meanwhile, the optimal or sub-optimal paths can be obtained. Finally, numerical simulations in 2-D and 3-D environments are conducted to demonstrate the feasibility and stability of the proposed algorithm. Simulation results show that the paths generated by the proposed DCPSO can not only meet the kinematic constraints of UAVs and safety requirements, but also achieve the simultaneous arrival and collision avoidance between UAVs for formation rendezvous. Compared with the cooperative co-evolutionary genetic algorithm (CCGA), the proposed DCPSO has better stability and a higher searching success rate.
External Unilateral Fixator of Own Design for the Treatment of Selected Mandibular Fractures in Horses
Authors: Turek Bernard , Drewnowska Olga , Kapłan Marcin
Published: June 2019

Most of the mandibular fractures occur as a result of accidents, kicks, or falls. The treatment of fractures located in the incisor region is quite successful with the use of the wiring method. Fractures that occur within the body of the mandible are more complicated. Some of them are open and infected and involve the cheek teeth, which makes treatment quite challenging. In these cases, using bone plates mounted directly on the bone would constitute poor technique. External skeletal fixators can be a good alternative for treatment of complicated fractures. In this article we present the construction and the possible use of a unilateral external fixator dedicated for the treatment of mandibular body fractures. The fixator consists of one rod having a diameter of 8 mm and a length of 20 cm, four booms, four connectors, and four self-threading apex pins with a diameter of 6 mm. Stainless steel was used in the production of the fixator. The device has been successfully used for the treatment of open mandible fractures. The stabilizer is light and is small in size, simple to use, and easily assembled and disassembled. It can be adjusted in three planes.
An Approach for a Spatial Data Attribute Similarity Measure Based on Granular Computing Closeness
Authors: Liao Weihua , Hou Daizhong , Jiang Weiguo
Published: June 2019

This paper proposes a spatial data attribute similarity measure method based on granular computing closeness. This method uses the distance and membership degree of different index levels of spatial entities to measure the similarity of attributes. It not only reflects the degree of similarity of spatial entity types at different index levels but also reflects the integration similarity between spatial entity types under a comprehensive index. This method embodies the layered idea of granular computing and can provide a basis for spatial problem decision making and for spatial entity classification. Finally, the feasibility and applicability of the method are verified by taking the similarity measure of the land-use type attribute in Guangxi as an example.
A Novel Remote Sensing Index for Extracting Impervious Surface Distribution from Landsat 8 OLI Imagery
Authors: Fang Hong , Wei Yuchun , Dai Qiuping
Published: June 2019

The area of urban impervious surfaces is one of the most important indicators for determining the level of urbanisation and the quality of the environment and is rapidly increasing with the acceleration of urbanisation in developing countries. This paper proposes a novel remote sensing index based on the coastal band and normalised difference vegetation index for extracting impervious surface distribution from Landsat 8 multispectral remote sensing imagery. The index was validated using three images covering urban areas of China and was compared with five other typical index methods for the extraction of impervious surface distribution, namely, the normalised difference built-up index, index-based built-up index, normalised difference impervious surface index, normalised difference impervious index, and combinational built-up index. The results showed that the novel index provided higher accuracy and effectively distinguished impervious surfaces from bare soil, and the average values of the recall, precision, and F1 score for the three images were 95%, 91%, and 93%, respectively. The novel index provides better applicability in the extraction of urban impervious surface distribution from Landsat 8 multispectral remote sensing imagery.
Recommendation Framework Combining User Interests with Fashion Trends in Apparel Online Shopping
Authors: Ok Minjae , Lee Jong-Seok , Kim Yun Bae
Published: June 2019

Although fashion-related products account for most of the online shopping categories, it becomes more difficult for users to search and find products matching their taste and needs as the number of items available online increases explosively. Personalized recommendation of items is the best method for both reducing user effort on searching for items and expanding sales opportunity for sellers. Unfortunately, experimental studies and research on fashion item recommendation for online shopping users are lacking. In this paper, we propose a novel recommendation framework suitable for online apparel items. To overcome the rating sparsity problem of online apparel datasets, we derive implicit ratings from user log data and generate predicted ratings for item clusters by user-based collaborative filtering. The ratings are combined with a network constructed by an item click trend, which serves as a personalized recommendation through a random walk. An empirical evaluation on a large-scale real-world dataset obtained from an apparel retailer demonstrates the effectiveness of our method.
Addressing Text-Dependent Speaker Verification Using Singing Speech
Authors: Shi Yan , Zhou Juanjuan , Long Yanhua , Li Yijie , Mao Hongwei
Published: June 2019

The automatic speaker verification (ASV) has achieved significant progress in recent years. However, it is still very challenging to generalize the ASV technologies to new, unknown and spoofing conditions. Most previous studies focused on extracting the speaker information from natural speech. This paper attempts to address the speaker verification from another perspective. The speaker identity information was exploited from singing speech. We first designed and released a new corpus for speaker verification based on singing and normal reading speech. Then, the speaker discrimination was compared and analyzed between natural and singing speech in different feature spaces. Furthermore, the conventional Gaussian mixture model, the dynamic time warping and the state-of-the-art deep neural network were investigated. They were used to build text-dependent ASV systems with different training-test conditions. Experimental results show that the voiceprint information in the singing speech was more distinguishable than the one in the normal speech. More than relative 20% reduction of equal error rate was obtained on both the gender-dependent and independent 1 s-1 s evaluation tasks.
Electric Vehicle Penetration in Distribution Network: A Swedish Case Study
Authors: Maninnerby Henrik , Bergerland Sune , Lazarou Stavros , Theocharis Andreas
Published: June 2019

This study aims to simulate the use of renewable energy in the form of different energy sources, such as solar cells, district heating, and in the presence of battery storage and for high penetration of electric vehicles in a typical Swedish power grid. The EnergyPLAN software is used. The purpose is to examine the demands in order to cope with the needs that may arise and to create a better understanding of how renewable energy affects the power balance and future investments in the case of a typical Swedish distribution system. The importance of this research is mainly based on the fact that it represents a real network, as it operates today, which is analyzed using the expected electric vehicle penetration. The aim is to investigate the expansion needs for maintaining the current quality for service despite the addition of new loads. In addition, the regional and national special regulatory and operational requirements are taken into account and described in this work.
Halogen-Substituted Derivatives of Dictyostelium Differentiation-Inducing Factor-1 Suppress Serum-Induced Cell Migration of Human Breast Cancer MDA-MB-231 Cells in Vitro
Authors: Totsuka Kyoko , Makioka Yuka , Iizumi Kyoichi , Takahashi Katsunori , Oshima Yoshiteru , Kikuchi Haruhisa , Kubohara Yuzuru
Published: June 2019

Triple-negative breast cancer (TNBC) is highly proliferative and metastatic, and because it lacks three major molecular targets for chemotherapy (estrogen receptor, progesterone receptor, and human epidermal receptor 2), it is extremely refractory. Differentiation-inducing factor 1 (DIF-1) and DIF-3, which are chlorinated alkylphenones, are lead anticancer compounds found in the cellular slime mold Dictyostelium discoideum. Here, we examined the in vitro effects of DIF-1, DIF-3, and 25 DIF derivatives on cell proliferation and serum-induced cell migration in human MDA-MB-231 cells, a model TNBC cell line. We found that Br-DIF-1, a chlorine-to-bromine-substituted derivative of DIF-1, strongly suppressed cell migration (IC50, 3.8 μM) with negligible effects on cell proliferation (IC50, >20 μM). We then synthesized 18 derivatives of Br-DIF-1 and examined the in vitro effects of these derivatives on cell proliferation and serum-induced cell migration in MDA-MB-231 cells. Among the derivatives, Br-DIF-1(+1), Br-DIF-1(+2), and Br-DIF-3(+2) exhibited strong anti-cell migration activities with IC50 values of 1.5, 1.0, and 3.1 μM, respectively, without affecting cell proliferation (IC50, >20 μM). These results suggest that these Br-DIF derivatives are good lead compounds for the development of anti-metastatic drugs against TNBC.
Neural Foundations of Ayres Sensory Integration®
Authors: Lane Shelly J. , Mailloux Zoe , Schoen Sarah , Bundy Anita , May-Benson Teresa A. , Parham L. Diane , Smith Roley Susanne , Schaaf Roseann C.
Published: June 2019

Sensory integration, now trademarked as Ayres Sensory Integration® or ASI, is based on principles of neuroscience and provides a framework for understanding the contributions of the sensory and motor foundations of human behavior. The theory and practice of ASI continues to evolve as greater understanding of the neurobiology of human behavior emerges. In this paper we examine core constructs of ASI identified in the seminal work of Dr. Jean Ayres, and present current neuroscience research that underlies the main patterns of sensory integration function and dysfunction. We consider how current research verifies and clarifies Ayres’ propositions by describing functions of the vestibular, proprioceptive, and tactile sensory systems, and exploring their relationships to ocular, postural, bilateral integration, praxis, and sensory modulation. We close by proposing neuroplasticity as the mechanisms underlying change as a result of ASI intervention.