bluuebunny/crossref_metadata_2025 huggingface dataset:
Ortaokul Öğrencilerinin Okuma Kaygıları ve Akademik Özyeterlik İnançlarının Çeşitli Değişkenler Açısından İncelenmesi
Authors: ARSLAN Aysel
Published: March 2018

Bu
araştırmanın amacı ortaokul öğrencilerinin okuma kaygıları ve akademik özyeterliklerinin
cinsiyet, sınıf, anne ve baba eğitim durumu değişkenlerine göre incelenmesi ve okuma
kaygıları ile akademik özyeterlikleri arasındaki korelasyonun belirlenmesidir. Araştırma
yöntemi olarak ilişkisel araştırma modeli içinde bulunan tesadüfi olmayan örnekleme
yöntemi kullanılmıştır. Araştırmanın örneklemini 2016-2017 eğitim-öğretim yılı
bahar döneminde Sivas il merkezinde bulunan 11 farklı ortaokulda eğitim
görmekte olan 241 kız, 255 erkek olmak üzere toplamda 496 öğrenci
oluşturmaktadır. Öğrencilerin okumaya yönelik kaygılarını belirlemek amacıyla Çeliktürk
ve Yamaç (2015) tarafından geliştirilen “Okuma
Kaygısı Ölçeği” kullanılmıştır. Ölçeğin güvenirliği .92 bu çalışmada ise .96
olarak bulunmuştur. Öğrencilerin akademik özyeterliklerini belirlemek amacıyla Muris
(2001) tarafından geliştirilen Türkçeye uyarlaması ise Telef ve Karaca (2012)
tarafından yapılan “Çocuklar İçin Özyeterlik
Ölçeği”nin alt ölçeği olan “Akademik
Özyeterlik Ölçeği” kullanılmıştır.
Ölçeğin güvenirliği .86 bu çalışmada ise .82 olarak bulunmuştur. Araştırmaya
ilişkin veriler Kolmogorov-Smirnov (K-S), Aritmetik Ortalama, Standart Sapma,
Bağımsız T Testi, Anova, LSD, Spearman Brown Korelasyon Katsayısı kullanılarak
analiz edilmiştir. Yapılan analizler sonucunda elde edilen bulgular
incelendiğinde; öğrencilerin okuma kaygılarının sınıf ve baba eğitim durumu
değişkenleri; akademik özyeterliklerinin sınıf, anne ve baba eğitim durumu
değişkenleri açısından farklılaştığı tespit edilmiştir. Öğrencilerin akademik
özyeterlikleri ile okuma kaygı puanlarının korelasyon sonuçlarına göre aralarında
negatif yönde orta düzeyde bir ilişkinin (-.34) olduğu görülmüştür.
PENGARUH SUSU SKIM TERHADAP PENAMPILAN AYAM PETELUR JANTAN
Authors: Dianto Sulis , Kunharjati Agustina Widyasworo
Published: March 2018

One effort to improve the efficiency and effectiveness of the production of roaster of broiler, can be done by improving the quality of feed is one of the skim milk dairy products in the solid form with the potential to supply poultry feed. Skim milk contains all the nutrients of milk except fat and vitamins that are fat soluble. This study aims to determine the effect of skim milk on the growth of roaster of broiler. Research using experimental design completely randomized design (completely randomized design). The material used in this study were male laying hens as much as 60 head aged 30 days to harvest at the age of 58 days. Skim milk from KUD Cement. Feed used is BR 1 of PT. Cargill Indonesia. Stage enclosure for maintenance, measuring 2m x 1.5m and is divided into 12 plots and each 1 plot size is 50cm x 50cm, each plot contained 5 chickens. The variables in this study were feed consumption, body weight gain and feed conversion ratio (FCR). Research results obtained three conclusions that the addition of skim milk significant effect (P> 0.01) on increasing body weight roaster of broiler P1 = 120 g / head / week. The addition of milk skin significant (P> 0.01) in penurunkan figures feed convertion ratio (FCR) roaster of broiler by P1 = 1.90. Treatment addition of 7.5% skim milk gives the best effect on improving body weight gain and feed convertion ratio (FCR) of roaster of broiler. Based on the results of the study suggested, adding skim milk can be used up to the level of 7.5% in the diet of roaster of broiler, but need considering economic efficiency.Keywords: Skim milk, appearance, roaster of broiler.
ANALISIS BIAYA PRODUKSI PETERNAKAN AYAM PETELUR DI KABUPATEN TULUNGAGUNG (Studi Kasus di Dofir Layer Farm)
Authors: Santoso Zeni Budi , Sudjani Eddy Trijana , Andaka Adi
Published: March 2018

This research was conducted at the lender Layer Farm owned by H. Dofir located in the village Rejotangan Rejotangan Tulungagung subdistrict. The aim was to determine the analysis of financial analysis in laying hens at the DLF Rejotangan Tulungagung subdistrict, It examines some of the financial aspects of the financial analysis used are, Net B/C Ratio, Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (PP) and Switchings Value. Based on the results of the calculation of financial feasibility of the business laying on Dofir Layer Farm then obtained when the initial conditions of business where there has been no increase productivity showed NPV greater than 0, namely Rp 2,359,608,260.73 IRR is greater than the discount rate that is equal to 71 percent, Net B/C of 3.28 is greater than one, PP is shorter than the life of the project is 2 years and 3 months. Business sensitivity analysis is feasible because decrease of production by 26 percent, the price increase of 28.6 percent DOC and feed prices rise by 37 percent NPV indicates value greater than zero, the Net B/C is greater than 1, IRR more greater than the discount rate and the PP before the age of the business end. In the conditions of development of the results obtained from the analysis showed that this business is financially feasible when done business development by improving the productivity of laying chickenKeyword : poultry, financial and business.
MENINGKATKAN MOTIVASI DAN KETERAMPILAN PEMBACAAN ALAT UKUR PADA MATA PELAJARAN MENGGUNAKAN ALAT UKUR DENGAN PENDEKATAN CONTEXTUAL TEACHING AND LEARNING DAN QUANTUM TEACHING
Authors: Hartono Sulistyo J
Published: March 2018

This study implements classroom action research to increase motivation and skills to apply readability of measurement tool kit, using contextual and quantum teaching.  The study used classroom action research method. The process of the research subsequently includes planning, action, observation and reflection. The observation includes notifications, recording and interview. The result of this research reveals that the student obtained improved competence in the end of the second cycle. All of the student passed the examination with score above 80 (A) and 80% student handed these competency
PENGEMBANGAN MATERI AJAR EKOSISTEM UNTUK SMP MENGGUNAKAN PENDEKATAN SAINS TEKNOLOGI MASYARAKAT DAN TIM HIJAU SEKOLAH
Authors: Sukarsih Sukarsih
Published: March 2018

This research was development of learning equipment research that have oriented at Kemp. It was implemented through Science Techonoloy Society Approach and School Green Team. The subject of this research were  39 students of SMP Negeri 3 Bontang assigned as One Group Pretest and Posttest Design. The research discovered the following findings: activity of  Teacher’s School Green Team to guide student’s activity (25,31%),  motivation (24,75%) and student activity observing (23,75%) with the degree of instrument reliability 87.70%. The rising of student’s activity indicated: observing (27,00%), sharing and discusion (25,23%) with the degree of instrument’s reliability average 98,47%. The completeness of student learning individually and classically were reached feasibility and the learning plan was in good category. Generally this research showed that learning by Science Technology Society Approach through School Green Team increased learning achievement.
MENINGKATKAN PENGUASAAN MENELADANI KHALIHAF ABU BAKAR DAN UMAR MENGGUNAKAN TEKNIK BERCERITA MELALUI TUTOR SEBAYA PADA SISWA KELAS VI SDN 005 BONTANG
Authors: Zaitun Zaitun
Published: March 2018

This study is aimed at increasing mastery on the history of teaching values of Abu Bakar and Umar Bin Khattab, the emperor after Nabi Muhammad.  The study uses classroom action research as the design to implement the same age tutor through story telling techniques.  Using two cycles, this study assignes teh sixth grade students of SDN 005 Botang as research subject.  This study discovers that learning actuivities increase and the average score increases from 6,5 to 8.2.  The participations and involvements during the learning process also increase so that the study is finished in the second cycle.  This study proves that using the same-age tutor to teach haracters of Abu Bakar and Umar as kulafaur rasyidin is favorable.
MENEGOSIASIKAN PENDIDIKAN PADA MASYARAKAT PEDALAMAN
Authors: Bunu Helmuth Y.
Published: March 2018

Education problems in remore areas in the border province at Central Kalimantan have long been identified but minor policy has been induced to solve.  This paper anylize practices to overcome problems all stakeholders may tparticipate though a concept of negotiation of education empowerment.  Basically, education problems in Central Kalimantan include: isolated and remoted area, low perception on education impact for children,  low societal participation on education, paucityof education nuancein public areas,  low social-economy of hinterland people, short number of teachers assigned in hinterland areas, ineffective menagement of teachers distribution and control.  At the secondary and senior level, availablity of SMP and SMA schools nearby has been crucial to solve.  Negotiation among stakeholders to overcome the basic education problems are required to facilitate facilities, empowerment, participations, and involvments of community, parents, schildren and traditional head, and government.
PENGUKURAN KINERJA DOSEN UNSERA DENGAN PENDEKATAN BALANCED SCORECARD
Authors: Suryaman Suryaman , Hamdan Hamdan
Published: March 2018

This study reports performance of lecturers of Serang Raya University (UNSERA) measured using scorecard balanced approach.  This study used survey method describing findings in numerical data and narrative data each of which was incurred in four perspective measures: finance, students’ satisfaction, business, and growth and instruction. Data were collected using questionnaire, documents, and Focus Group Discussion.  The study revealed that description of research and social charity in 2011-2014, (1) finance perspectives showed that lecturer incurred small attainment as lecturers received small amount of donor provided by other institutions;   (2) a significant increase was achieved in perspectives of growth and instruction in that lecturers were motivated to conduct researches and improved teaching-learning performances; (3) in all, lecturer performance of UNSERA was good, indicated by the increase of journal articles published in national and international journals.
IMPLEMENTASI BAHAN AJAR MEMBACA BERBASIS MASALAH UNTUK MELATIH KEMAMPUAN BERPIKIR KRITIS DAN PEMECAHAN MASALAH SISWA KELAS VIII SMPN 25 MALANG
Authors: Yasin Muhammad , Priyatni Endah Tri , Suyono Suyono
Published: March 2018

The objective of this study is to see effectiveness of problem based reading materials to improve critical thinking skills, problem solving skills, and learning outcomes. The study used experimental study of One-Group Pretest-Posttest design assigning 25 students of VIII graders of SMPN 25 Malang as sample. Data were collected using observation, test, and questionnaire. The study revealed that (1) students ability of critical thinking improved after implementation of problem solving skills, as indicated by n-gain score in positive manner with average 0.7 in high criteria; (2) students problem solving skills improved seen in n-gain score with positive value and average 0.4 based upon enough criteria; (3) student improvement seen by the classical completeness improved up to 100%.
LESSON PRESENTATION MELALUI TEKS UNTUK MENINGKATKAN KETERAMPILAN MENGAJAR GURU
Authors: Susanto Heri
Published: March 2018

This paper describes lesson presentation to improve teachers’ skills in classroom interactions. Lesson presentation or teaching to transfer is skills a teaher should demonstrate to enhance and convince students on a concept.  It helps students identify material context, guides students to summarize, and broadens thinking skills through reflection and teacher giude. This paper argues in Indonesian language teaching, lesson presentation improves if teachers implement text structures in a variety of genres.  The way teachers are formally trapped into teacher-centered that teacher talks dominate will be minimized using lesson presentation of  appropriate contexts.  Presentation should be temporary, at the beginning, at the core, or at the closing encouraging fluency in appropriate exposures.  Equipped with compsite texts,  lesson presentation signifies beneficials for teaching skills.
MENINGKATKAN HASIL BELAJAR BIOLOGI MELALUI MODEL PEMBELAJARAN MAKE A MATCH PADA SISWA SMP
Authors: Mudrikah Mudrikah
Published: March 2018

The objective of this study is to increase achievement on biology subject using learning model make a match.  This study used classroom action research design with three cycles.  The study took place in SMPN 1 Karangploso Malang involving 32 students as subject.  Instruments of this study were obsevation sheets and questionnaire.  Data of the study were learning process the students involved in the make a match instructions.  Data were analyzed using descriptive statistics to draw students minimum score achievement and rate percentage in every cycle.  The study revealed: (1) rate percentage of mastery learning in cycle I is 63.2%, cycle II 72% and cycle III 86.9% respectively and (2) students’ mastery of achievement in cycle I is 7 (21.8%) finished and 25 (78.1%) unfinished, in cycle II: 19 (59.4%) finished and 13 (40.6%) unfinished; in cycle III:  28 (87.5%) finished and 4 (12.5%) unfinished.
PENERAPAN METODE NUMBERED HEADS TOGETHER UNTUK MENINGKATKAN HASIL BELAJAR GERAK PADA BENDA BAGI SISWA KELAS VIII SMPN 1 KARANGPLOSO
Authors: Fauzia Lilik
Published: March 2018

This study aims to improve student learning outcomes in terms of cognitive, affective, and psychomotor using NHT. This study is a classroom action research conducted in three cycles. This study assigned the VIII graders of SMPN 1 Karangploso Malang in 2013.  The results showed that (1) application of learning model using Numbered Heads Together increases student activities. Respectively, rate percentage of circle 1 to circle 3 is 69.35%, 76.61%, and third cycle of 87.58%; (2) the increased subject matters include motion on the body, basic competence to understand rectilinear motion and the influence of the force of the motion based on Newton's law, and its application in motion living beings and the motion of objects in everyday life.
READINESS OF TEACHING AND LEARNING ENGLISH AT ELEMENTARY SCHOOLS IN MATARAM CITY
Authors: Suhirman Lalu
Published: March 2018

This research is aimed at describing the readiness of teaching-learning English at elementary school (ES) in Kodya Mataram, accentuating on perception of respondents; English teacher’s qualifications; the availability of English techer and teaching facility; students’ interest of study English; and constrains in English instruction. This survey assigns its subjects to 14 principals without EP, 49 parens of children’s schools with EP, and 55 parents of children’s schools without EP. The instruments used to collect data are questionnaire, interview guide, and observation form. The study reveals that (1) most respondents in each group are ready to teach English at ES; (2) English teachers’ qualification meet the criteria; (3) Of 30 ES without EP, 7 (23.33%) are ready, English text books for ES with are categorized mostly ready; and (4) Students at ES with are mostly ready. In addition, 9 (30%) of students at 30 non-ESP schools are totally not ready.
PENGEMBANGAN TES READING FOR ACADEMIC PURPOSES UNTUK PROGRAM EAP DI IAIN SURAKARTA
Authors: Solikhah Imroatus
Published: March 2018

The objective of this study is to devise standardized test for Reading for Academic Purposes (WAP).  The test was focused on WAP as the main competency of reading for EAP and elaborated sub-competencies into literal, inferential, and critical reading.  The items of the test were developed from 9 passages before trials to explore critical reading as main academic literacy of EAP program.  A quantitative approach was used in this study emphasizing statistical analysis for manual and SPSS program.  Subjects of this study for three time trials were 30 students of EAP class at IAIN Surakarta.  Each trial involved 10 students.  The study revealed that of 40 items of reading test, 24 items derived from 6 passages performed accepted validation showing five criteria: difficulty indexes, degrees of difficulty, distractor effectiveness, validity, and reliability.
PENGARUH LAYANAN BIMBINGAN PENYULUHAN TERHADAP KENAKALAN ANAK KELAS VI SDN 005 BONTANG UTARA
Authors: Zaitun Siti
Published: March 2018

This study was intended to see the relationship between counseling guidance and juvenile delinguency.  The subject of this study was 63 students of the sixth grade of SDN 005 Bontang Utara.  This study used questionnaire consiting of 10 items to identify main data on the effectiveness of counceling guidance and juvenile delinguency.  In addition, documentary analysis regarding the counceling and juvenile delinguency was used complimentary to the questionnaire.  The analysis of the data discovered three descriptions:  counceling guidance, juvenile delinguency, and the relationship between counceling guidance and juvenile delinguency.  Results of guidance counceling indicated that of 63 respondents, 33% or 21 received good services, 38% or 24 enough, and 29% or 18 low.  The juvenile delinguency indicated that of 63 respondents, 50% or 31 respondents performed low traits, 25% or 16 enough, and 25% or 16 high. The hypothesis testing indicated that r-value (0.850) was greater than r-table (0.244) at p=0.05, N=63. The result is significant, meaning the better the quality of guidance counceling, the lower the juvenile deinguency was performed by the respondents.
MOTIVASI BELAJAR DAN HASIL BELAJAR PSIKOMOTOR SISWA MTs SUNAN AMPEL SIMAN KEPUNG KELAS IX DALAM AKTIVITAS PRAKTIKUM IPA
Authors: Agustina Dwi Kameluh
Published: March 2018

This study describes how motivation promotes psychomotor learning outcomes of MTs students.  The objectives of this study are to see (1) learning motivation in practicum activities of sciences subject, and (2) psychomotor learning achievement in the practicum of sceince subject.  This study used descriptive design assigning grade IX of 34 students of MTs Siman Kepung Blitar as sample. Data were collected using questionnair and test.  Data were analyzed using descriptive statistics.  The study found that students average motivation is 83% indicating high motivation and good performance.  Rate percentage of motivation in each category is as follows: (1) interest 90% or good, (2) attention 86% very good, (3) focus of concentration 78% good, and (4) diligent 80% good. Average scor of psychomotor achievement is 80 or very good.
PEKERJA ANAK DI SEKTOR INFORMAL PENCUCIAN MOBIL TENGGARONG
Authors: Nur Jumaidi
Published: March 2018

Children labors in the Car Wash Units informal sector is particularly obtained in Tenggarong, the capital of Kutai Kartanegara county. This condition is beyond an expected condition that Free Children Labor Zone in Kutai Kartanegara is executed in Kutai Kartanegara.  This paper reports an identification on Children Labors in Car Wash Units in Tenggarong, providing other facts that a struggle is remaining necessary to make the program successful.
MODEL PENEMUAN TERBIMBING UNTUK MENGIDENTIFIKASI KEKURANGAN TEKS PROSEDUR SISWA KELAS VIII SMPN 1 KARANGPLOSO
Authors: Triningsih Diah Erna
Published: March 2018

The purpose of this study was to describe the learning procedure to identify deficiencies text guided discovery methods class VIII SMP Negeri 1 Karangploso. This study used a qualitative descriptive study. The results showed (1) model of guided discovery can be used for learning to identify the drawback text procedures, (2) RPP are designed teacher right good basic competencies, indicators, learning objectives, materials, lesson, source, medium, and apparatus as well as the design of attitude assessment and knowledge appropriate to reach KD, (3) determining the allocation of time on the basis of competence and promissory prota less precise, (4) assessment of the results overlap with text revising skills assessment procedure.
KOHESI PADA TEKS CERITA RUBRIK ANAK-ANAK, REMAJA, DAN DEWASA DALAM MAJALAH PANJEBAR SEMANGAT
Authors: Triasmoro Guntur Yuli , Sumarlam Sumarlam , Djatmika Djatmika
Published: March 2018

The aim of this research is to find grammatical and lexical cohesion in Javanese magazine Panjebar Semangat included in the rubrics: Wacan Bocah, Manja, and Cerkak.  The study used content analysis with qualitative approach.  Data of this study were  lingual units such as utterances, sentences, and clauses taken from the rubrics. Data were collected using review and note technique.  Data were analyzed using “agih method”, “bagi unsur langsung” (BUL), substitution and elliptisis technique.  The results shows that grammatical aspect used in Wacana Bocah, Manja, and Cekak rubric in Panjebar Semangat magazine included: reference, substitution, ellipsis, conjungtion. Lexical aspects in the disourses comprise of: repetition, synonym, antonym, collocation, hyponym, and equivalency. Theme that found in Wacan Bocah, Manja, and Cekak rubric is agriculture, education, love, friendship, life style, spirituality, law, and culture.
BACK MATTERS: Publication Ethics, Author Guidelines, Paper Template, Back Cover
Authors: Budiharso Teguh
Published: March 2018

This page consists of back cover, oublication guide and paper template
The Informatics Stack: A Heuristic Tool for Informatics Teaching
Authors: Lehmann Harold
Published: March 2018

Objective: To develop a heuristic framework for students to organize and apply the many concepts of informatics for rapid use.

Method: Organization of curriculum material and recurrent refinement by student feedback. An Informatics Stack was developed based on several existing informatics and software-development frameworks comprising several levels of abstraction, from what a system is supposed to accomplish (4 levels) to how it accomplishes it (5 levels). At each level, there are specific concerns, types of interoperability, ethical and legal issues, testing and evaluation approaches and methods, and relevant scientific disciplines, and privacy (upper 5 levels), confidentiality (middle 3 levels), and security (lower 4 levels ) concerns whose levels overlap. An 8-week Introduction to Informatics course was taught for 6 years to masters students of informatics and of public health, based on the Stack, with a Final Project continually filled in during the course, where students applied the Stack to existing reports describing health information systems and their deployments.

Results: Student feedback from 538 students working in 116 groups over 6 years shows near-universal appreciation that the Stack helped to organize their review of the report. Each student, from a wide variety of backgrounds, identified some level of the Stack as something they might have otherwise missed, and all levels were invoked by some student. Attributes identified by the students as missing from the Stack concerned the practicalities of system development.

Conclusion: The Stack is a broadly-encompassing heuristic whose application can be learned and applied by students from a wide variety of backgrounds in an 8-week course.
Scanning speed phenomenon in contact-resonance atomic force microscopy
Authors: Glover Christopher C , Killgore Jason P , Tung Ryan C
Published: March 2018

This work presents data confirming the existence of a scan speed related phenomenon in contact-mode atomic force microscopy (AFM). Specifically, contact-resonance spectroscopy is used to interrogate this phenomenon. Above a critical scan speed, a monotonic decrease in the recorded contact-resonance frequency is observed with increasing scan speed. Proper characterization and understanding of this phenomenon is necessary to conduct accurate quantitative imaging using contact-resonance AFM, and other contact-mode AFM techniques, at higher scan speeds. A squeeze film hydrodynamic theory is proposed to explain this phenomenon, and model predictions are compared against the experimental data.
Behavioral Characteristics and CO+CO2 Production Rates of Halley-type Comets Observed by NEOWISE
Authors: Rosser J. D. , Bauer J. M. , Mainzer A. K. , Kramer E. , Masiero J. R. , Nugent C. R. , Sonnett S. , Fernández Y. R. , Ruecker K. , Krings P. , Wright E. L. ,   The WISE and NEOWISE Teams
Published: March 2018

From the entire data set of comets observed by NEOWISE, we have analyzed 11 different Halley-type Comets (HTCs) for dust production rates, CO+CO2 production rates, and nucleus sizes. Incorporating HTCs from previous studies and multiple comet visits, we have a total of 21 stacked visits, 13 of which are active and 8 for which we calculated upper limits of production. We determined the nucleus sizes of 27P, P/2006 HR30, P/2012 NJ, and C/2016 S1. Furthermore, we analyzed the relationships between dust production and heliocentric distance, and gas production and heliocentric distance. We concluded that for this population of HTCs, ranging in heliocentric distance from 1.21 to 2.66 au, there was no significant correlation between dust production and heliocentric distance, nor between gas production and heliocentric distance.
BANYAN. XI. The BANYAN Σ Multivariate Bayesian Algorithm to Identify Members of Young Associations with 150 pc
Authors: Gagné Jonathan , Mamajek Eric E. , Malo Lison , Riedel Adric , Rodriguez David , Lafrenière David , Faherty Jacqueline K. , Roy-Loubier Olivier , Pueyo Laurent , Robin Annie C. , Doyon René
Published: March 2018

BANYAN Σ is a new Bayesian algorithm to identify members of young stellar associations within 150 pc of the Sun. It includes 27 young associations with ages in the range ∼1–800 Myr, modeled with multivariate Gaussians in six-dimensional (6D) XYZUVW space. It is the first such multi-association classification tool to include the nearest sub-groups of the Sco-Cen OB star-forming region, the IC 2602, IC 2391, Pleiades and Platais 8 clusters, and the ρ Ophiuchi, Corona Australis, and Taurus star formation regions. A model of field stars is built from a mixture of multivariate Gaussians based on the Besançon Galactic model. The algorithm can derive membership probabilities for objects with only sky coordinates and proper motion, but can also include parallax and radial velocity measurements, as well as spectrophotometric distance constraints from sequences in color–magnitude or spectral type–magnitude diagrams. BANYAN Σ benefits from an analytical solution to the Bayesian marginalization integrals over unknown radial velocities and distances that makes it more accurate and significantly faster than its predecessor BANYAN II. A contamination versus hit rate analysis is presented and demonstrates that BANYAN Σ achieves a better classification performance than other moving group tools available in the literature, especially in terms of cross-contamination between young associations. An updated list of bona fide members in the 27 young associations, augmented by the Gaia-DR1 release, as well as all parameters for the 6D multivariate Gaussian models for each association and the Galactic field neighborhood within 300 pc are presented. This new tool will make it possible to analyze large data sets such as the upcoming Gaia-DR2 to identify new young stars. IDL and Python versions of BANYAN Σ are made available with this publication, and a more limited online web tool is available at http://www.exoplanetes.umontreal.ca/banyan/banyansigma.php.
The Effect of the Carbon Fiber on Concrete Compressive Strength
Authors: Liu De Jia , Chen Mei Jun , Xue Li , He Fan , Hu Jian
Published: March 2018

With the rapid development of construction, the high quality of the construction material is required. Mixing carbon fiber in concrete attracts more and more attention as it can reinforce concrete. However, the science research and engineering application of carbon fiber reinforced concrete is relatively few. In this paper, the effects of different mixing amount of carbon fiber and the sand ratio in concrete and the curing time of concrete and relationships between these factors were investigated. Proper carbon fiber and sand ratio can promote the compressive strength of concrete and it has a good resistance to cracking. The compressive strength of concrete with different mixing amounts of carbon fiber peaks when the sand ratio was 31% and the compressive strength was better when the carbon fiber mixing amount was 0.2% and 1% than any other ratios after 28 days. When the sand ratio was 31%, the compressive strength of carbon fiber mixing amount increased with the increase of curing time and it reached the top when the carbon fiber ratio was 0.8%. The mixing amount of carbon fiber also had a great influence on the early compressive strength to some extent. We anticipate that the research can offer certain reference for engineering practice.
An Improved Method for the Preparation for New Antibacterial Dressing Crosslinked with Carboxymethyl Chitosan
Authors: Wang Qian , Gong Ke , Cao Cheng Bo , Guo Jing , Wang Xiao Jiao
Published: March 2018

A new antibacterial acellular dermal matrix (AADM) dressing can not only resist infection, but also accelerate wound healing. AADM was prepared by SDS (0.40%), trypsin (0.40%) and keratin (0.30%), and then cross-linked with carboxymethyl chitosan (1%) with glutaraldehyde, whose tensile strength (MPa) is 10.66, thickness (mm), 0.53, the rate of permeable steam (g • m-2 • 24h-1), 3640, porosity (%), 81, degradation time in vitro (h), 24.33, pH, 6.5, and the average inhibition rate, more than 70%. At the same time, scanning electron microscopy showed that the structure of AADM was evacuated and the pores were interconnected. On such basis, a conclusion was drawn: the properties of AADM has been sharply increased, compared with acellular dermal matrix, which cannot resist infection, and the new antibacterial acellular dermal matrix completely meets the clinical requirements for burn dressings.
The Effect of Milling Time on the Size of Silica Particles from Silica Sand
Authors: Ismail Agus , Akbar Alamsyah Insan , Kholil Muhammad , Heru Susanto Bambang , Nasikin Mohamad
Published: March 2018

We report a method to adjust the size of silica nanoparticles from silica sand. In this study, synthesized silica nanoparticles by sol gel process from silica sand were conducted, with previously was controlled the size of silica sand by mechanical milling. Silica sand was milled by High Energy Milling in order to reduce the size into powder form. Effect of milling time shown the content of sodium and silicon is increased in sodium silicate solution obtained from various times of silica sand milling (30, 60 and 90 minutes, respectively) which is reacted with sodium hydroxide 8 M. The result of silica nanoparticles from sol gel process of sodium silicate solution were characterized using atomic absorption spectroscopy, scanning electron microscopy and X-ray diffraction techniques. It was found that the size of silica nanoparticles could be tailored with the change of milling time.
A Comparative Study of Delayed Hydride Cracking in Zr-3.5Sn-0.8Nb-0.8Mo and Zr-2.5Nb
Authors: Fang Qiang
Published: March 2018

A new test procedure for measuring the resistance to delayed hydride cracking was developed. The critical stress intensity factors for delayed hydride cracking and the crack growth velocities of Zr-3.5Sn-0.8Nb-0.8Mo alloy with different heat treatments were evaluated and compared with Zr-2.5Nb. It was found that Delayed Hydride Cracking (DHC) crack growth velocity increases with the alloy strength, and the critical stress intensity factor is independent of heat treatment history or alloy composition.
Effects of Manganese on the Microstructures, Mechanical Properties and Deformation Characteristics of Cu-29Zn Alloy
Authors: Basori Imam , Pratiwi Hafsah I. , Sofyan Bondan T.
Published: March 2018

Deformation characteristics of brass alloy are still under discussion, particularly concerning the critical level of when the change of deformation mechanism occurs. Previous research showed that the addition of Mn on brass alloys resulted in grain refinement and mechanical properties alteration. However, the effects of Mn on the deformation characteristic of brass alloys have not been investigated. In this research, Cu-Zn-xMn alloys were manufactured by gravity casting process using pure Cu and Zn ingots, as well as Mn chips as the feeding materials. Mn addition was varied to 1.26, 3.48, and 5.83wt.%. As-cast samples were homogenized at 800 °C for 2 h in a muffle furnace. The samples were then cold-rolled with the level of deformation of 20, 40, and 70 %. Samples characterization includes chemical composition analysis, microstructure observation, tensile and hardness testing. The results showed that addition of Mn for 5.83 wt.% and above created β’ phase, which is richer in Mn compare to that in the matrix. This phase segregated in the grain and along the grain boundary with irregular forms. Significant increase in hardness, yield and tensile strengths was observed with addition of Mn. The maximum elongation was achieved by addition of 3.48 wt.% Mn, while further addition tended to decrease it. At 20% deformation, slip dominated and its density reduced with addition of Mn. When the deformation level increased to 40%, twinning replaced slip as the predominant mechanism. Twinning density is slightly increase with the presence of Mn. Further deformation at 70% produced shear bands and flattened the β’ phase. Greater Mn content led to formation of more shear band.
Corrosion, Wettability, and Adhesion of Acrylic Coatings Containing Silane-Treated Mineral Fillers on Carbon Steel
Authors: Pajarito Bryan B. , Caguntas Andrew Joelle F. , Felices Niño B. , Tubalinal Honesto Ovid S. , Leuterio Giselle Lou D.
Published: March 2018

Acrylic coatings were modified by adding 0.5 and 1.0% (v/v) of epoxysilane-treated (aluminosilicate, muscovite, nepheline syenite, and wollastonite) and alkoxysilane-treated (aluminosilicate) mineral fillers. Corrosion behavior of coated carbon steel specimens was studied using polarization method. Wetting behavior and adhesion of specimens were evaluated by static contact angle and cross-cut tape test. Addition of silane-treated mineral fillers dramatically improved the corrosion resistance of acrylic coating, with composite coating filled with alkoxysilane-treated aluminosilicate at 0.5% concentration showing significantly low corrosion tendency and rate in 2 M HCl solution. Contact angle also increased with the addition of fillers, with composite coating containing alkoxysilane-treated aluminosilicate at 0.5% yielding the highest mean value. Adhesion of acrylic coatings was enhanced after addition of fillers at 0.5%, with composite coatings filled with wollastonite and alkoxysilane-treated aluminosilicate giving the lowest percent area removed after application of adhesive tape. Alkoxysilane-treated aluminosilicate was found consistent in improving the anti-corrosion characteristics, water resistance, and adhesion to carbon steel of acrylic coatings.
Properties of Sago Starch-Based Biopolymers with Clay, Cellulose, Zinc Oxide and Chitosan Fillers
Authors: Bahruddin  , Hendri Zwilla Oktoriana , Rifaldi Anugerah , Syaputra Annur Fauzi , Rochaeni Ummy Aisyah
Published: March 2018

Sago (Metroxylon spp) is one of plant that contains high starch, so it has potential to be utilized as raw material for biopolymer production. This study aims to compare the properties and morphology of sago starch-based biopolymers reinforced by different filler types, including clay, cellulose, zinc oxide and chitosan. Biopolymer sample was prepared at 75 °C with ratio of water to the starch of 10 ml/gr, glycerol content of 0.1 ml/gr of the starch and filler content 6% w/w. The testing included tensile, water uptake and biodegradability properties according to ASTM D882, ASTM D570 and DIN EN ISO 846 standards, respectively. Other testing also conducted for morphology by using scanning electron microscope (SEM). The results showed that biopolymer with chitosan filler has better tensile, water uptake and biodegrability properties compared to other filler type, with tensile stregth of 11 MPa, elongation at break of 9%, water uptake of 10% and biodegrability of 40%. The SEM micrograph shows that the filler still has an agglomerated portion in the starch matrix. Increasing the biopolymer properties is still possible by improving the morphology.
Short Review: Potential Production of Acacia Wood and its Biocomposites
Authors: bin Bakri Muhammad Khusairy , Jayamani Elammaran , Heng Soon Kok , Kakar Akshay
Published: March 2018

In this short review paper, the physical and mechanical properties of acacia wood, poly lactic acid (PLA) and polyhydroxyalkanoates (PHA) were analyzed. Existing factors that affect the mechanical properties of natural fiber composites were investigated and identified. By knowing these factors, a possibility and potentiality in implementing the natural acacia wood reinforced material with hybrid polymer were discussed. It was found that the acacia wood had the potential to re-condition soil and have the potential to become reinforced materials in hybrid polymer composites. In addition, using fully biodegradable polymer such as PLA and PHA made it sustainable and environmentally friendly.
Investigating the Influence of Bending Parameters on the Springback Behavior of Ultra-High Strength Spring Strips
Authors: Richter Karsten , Reuther Franz , Müller Roland , Landgrebe Dirk
Published: March 2018

The spring industry has to process ultra-high strength spring strips of the steel grade 1.4310 (X10CrNi18-8). Springback during bending is a limiting factor for a resource-efficient production process in the so called stamping bending technology. This paper reports a mainly experimental investigation on the influence of bending parameters on the evolving springback of spring strips of the grade 1.4310 with tensile strengths TS = 1500-1800 MPa.
Improvement of Manufacturing Technology for Thin-Walled Pipes Made of Copper Alloys
Authors: Bogatov Aleksandr Aleksandrovich , Salikhyanov Denis Rinatovich , Ovchinnikov Aleksandr Sergeevich
Published: March 2018

Thin-walled pipes made of copper alloys – the brass grades L96, L68, L63, LANKMc; the bronze grade BrOF (the GOST state standard) are of great demand in aircraft, shipbuilding, automotive, defense, diesel and instrument-making industries. Pipe diameter ranges between 4.0 and 20 mm, and wall thickness is in the range from 0.1 to 0.6 mm. The manufacture of these pipes using traditional technological schemes is characterized by high labor input and low stability in providing quality characteristics, such as dimensional accuracy, the presence of surface defects and the level of mechanical properties. This study presents scientific evidence, new technological schemes developed for manufacturing pipes made of copper alloys with the use of the equipment and technology of multiple drawing on a long movable mandrel and results of their adoption at Revda Non-Ferrous Metal Processing Works JSC.
Closing of Shrinkage Cavities by Means of Open-Die Forging
Authors: Hauri Janine , Graf Marcel , Awiszus Birgit , Kawalla Rudolf
Published: March 2018

Inner cavities in cast ingots have to be closed by means of open-die forging to guarantee the integrity of the forged components during usage. In the paper a differentiation is made between the macroscopic and the microscopic closing of natural inner cavities. Special attention is paid to the dendritic structure of the surfaces of inner cavities and their impact on the microscopic closing behavior. Additionally, investigation showed that a closing on the microscopic scale is only possible if the cavities do not come in contact to the atmosphere during hot forming. For the analysis of the cavity closing, ingots of a heat-treatable, hot-working and a cold-working steel were used. The ingots were cast, forged and the surface of the inner voids was analyzed with the help of light-microscopy, SEM and EDS for the microstructure and by using tensile tests on macroscopic scale. Also, numerical investigations were a part of the work, whereby the parameters void size, void shape and anvil-shape were varied. As a result of the numerical investigation, a so called closing function was formed. This function enables the user to calculate the necessary height-reduction for closing of inner cavities of the regarded ingot format.
Development of a Quenching-Partitioning Process Chain for Forging Components
Authors: Graf Marcel , Härtel Sebastian , Bauer Alexander , Förster Wolfgang , Bublikova Dagmar , Wagner Martin F.X. , Awiszus Birgit , Masek Bohuslav
Published: March 2018

The aim is to realize a Q&P (Quenching and Partitioning) process for a hot forged component made of low-alloyed advanced high-strength steel (AHSS) 42MnSiCr. One advantage of this steel is the low alloy concept which is cost-effective. After forging, the component is cooled down to room temperature with a subsequent heat treatment to achieve the characteristic microstructure with martensite and retained austenite. The material is annealed and then quenched to just above the martensite finish temperature (MF-temperature). Hence, in the martensitic matrix about 10 to 15% retained austenite is included. Finally, the Q&Ped material is artificially aged at 250 °C to support the diffusion process of carbon from the over-saturated martensite into the austenite. Thereby, mechanical properties of 2000 MPa for tensile strength with fracture strains of 10% can be achieved. This paper provides details of the process and material behavior for a reduction of the process chain. The goal is to develop a technology for the quenching and partitioning treatment of forged components by using the thermal energy from forging. Ideally, the quenching step should be performed in the forming dies just above the MF-temperature with additional holding on the temperature level. The majority of forged parts have different cross sections. Therefore, the cooling conditions are inhomogeneous in each cross section of the components. This cooling behavior was analyzed in laboratory tests with a forged part. Furthermore, the heat transfer coefficients were determined for different cooling media (water, air). The cooling technology was experimentally and numerically simulated in a first step for the conventional process chain (forging, cooling to room temperature, austenitisation, quenching, artificial ageing) and correlated with the microstructural evolution in combination with the component’s mechanical properties.
Robustness - Practice Report: Make Forming Processes more Stable
Authors: Kittner Kai , Stimper Bernd
Published: March 2018

In the last years, the development of sheet metal forming technologies shows many different tendencies such as materials or geometries. In the same duration the process planning for stamping processes keep still in the same way, although numerical algorithm and hardware improved continuously. That means, as components, processes and materials got more complex, the planning process still stays in the same technical evolution stage as years before. At present it is mostly a deterministic kind of planning. And in this way, potentials and possibilities still lie down. In the actual discussion around industry 4.0 new potentials around this topic seems to show new ways, but a lot of data and technologies are already available to improve production and forming processes. The task is to use this data. The key to improve the processes based on this data is the stochastic simulation, especially in the sheet metal forming industry [1,2]. The eberspaecher company as customer for sheet metal parts has an immense interest in high quality parts. High quality parts are an important step to reduce cost in the own following manufacturing. This paper deals with actions to integrate stochastic considerations into the planning process at eberspaecher. And its content should excite the discussion around robustness processes, stochastic simulation and in this way industry 4.0 as one base for future manufacturing.
Misleading Hepatitis B Serology Following Rho (D) Immune Globulin (Human) Injection and Influenza Vaccine
Authors: Chen Xuanxuan
Published: March 2018

Having a hepatitis B surface antibody (HBsAb) titre of more than 10 mIU/mL after hepatitis B vaccination is generally considered to confer immunity to hepatitis B. This case report discusses an unusual case of a false positive hepatitis B core total antibody (HBcAb) following administration of either Rho (D) immune globulin (Human) injection or influenza vaccine in a patriuent who was previously immunised against hepatitis B.
Religieuze tolerantie vraagt onderwijs in gastvrijheid
Authors: Broer Nicolaas A. , De Muynck A. , Potgieter Ferdinand J. , Van der Walt Johann L. , Wolhuter Charl C.W.
Published: March 2018

The South African-Dutch research group responsible for this article started its activities in 2012 by looking at religious tolerance (in education) as a means of addressing the tendency for religious intolerance, extremism and fundamentalism. While (teaching in) tolerance seemed to be a promising way to counter religious intolerable behaviour, some shortcomings also became apparent. For example, the concept of tolerance includes an aspect of passivity towards others who adhere to another religion. The concept also does not appear to be able to respond to attitudes and values such as respect, human rights and diversity. Accurate investigation of this problem, both conceptually and empirically, led to the understanding that hospitality is a concept that embodies more active adaptation to those who are different (including religious). Hospitality, therefore, seems to be a more promising concept than tolerance for reducing religious tension between individuals and groups. The inner contradiction discovered by Derrida in the notion of hospitality does not detract from the concept of being defined from a Biblical point of view. Hospitality can also be taught to young people. Although there are no formal provisions for hospitality in the national curricula, an analysis of the Dutch and South African national curricula shows that there is room for hospitality education.
Brains versus beauty in the knowledge economy
Authors: Ford Richard , Price Gavin , Hofmeyr Karl B. , Chiba Manoj
Published: March 2018

Orientation: It is a widely held belief that attractive people generally experience an easier life and that the door to success is opened by perfect bone structure and a sparkling smile. However, attractiveness might play a far lesser role in individual’s achieving their objectives than has previously been thought. Is it possible that an individual’s qualifications may have a greater influence on the perceptions of managers who assess the suitability of a candidate of a knowledge worker?Research purpose: The study sets out to examine the relative predictive power of physical attractiveness and qualifications in the decision to hire a knowledge worker.Motivation for the study: The research was motivated by a desire to explore the presence of bias in the decision-making process when seemingly rational individuals are exposed to factors such as physical attractiveness of a job candidate and then faced with a decision on whether to hire them.Research design, approach and method: A two-phased experimental design was applied to investigate the existence and strength of the beauty premium amongst a group of managers who were provided with fictitious resumes coupled with photographs of the applicants. These managers were requested to make a hiring decision based on the information supplied.Main findings: Although results confirm the existence of a beauty premium, it was relatively weak. It indicated that qualifications have a greater influence on a manager’s perception of the suitability of a candidate to fill a position of a knowledge worker.Practical or managerial implications: The research draws attention to the possibility of bias in selection decisions and proposes ways in which such potential bias can be limited.Contribution: This study contributes to knowledge concerning the existence or otherwise of a so-called beauty premium, with particular reference to its impact in the knowledge economy.