bluuebunny/crossref_metadata_2025 huggingface dataset:
New ruthenium(II) bipyridyl complex: Synthesis, crystal structure and cytotoxicity
Authors: Baroud Afya , Mihajlovic-Lalic Ljiljana , Stankovic Dalibor , Kajzerberger Marijana , Van Hecke , Grguric-Sipka Sanja , Savic Aleksandar
Published: February 2017

A new Ru(II) bipyridyl complex with O4-hydrogenpyridine-2,4-dicarboxylate was synthesized and characterized by IR, NMR and mass spectrometry, X-ray diffraction analysis and elemental analysis. The electrochemical characteristics of the complex were investigated by cyclic voltammetry, revealing Ru(II)/Ru(III) electron transfer in the positive range of potentials. On the opposite potential side, multiple partially reversible peaks were dominant, representing subsequent reductions of the bulky bipyridyl moiety. The cytotoxic activity of the complex was tested in two human cancer cell lines: A549 (lung cancer) and K562 (leukemia) as well as non-tumor MRC-5 cells, by MTT assays. The IC50 values were > 300 and 177.63?2.28 ?M for the A549 and K562 cells, respectively.
Psychometric evaluation of the authenticity scale on the sample of students in Serbia
Authors: Grijak Djurdja
Published: February 2017

The aim of this study, conducted at two time points, was to evaluate the
psychometric properties of the Serbian translation of the Authenticity Scale
on the sample of students. The paper presents the results of testing the
validity construct of the Authenticity Scale by confirmatory factor analysis
at two time points, on the initial sample of 706 students and on the
test-retest sample of 206 students within a 10-week interval. The model in
which there are three separate, mutually related dimensions with the
superordinate factor of authenticity best describes the scale structure. The
test-retest sample was used to test the convergent validity of the
Authenticity Scale by evaluating its relation to the measures of both
positive and negative affect, self-esteem, psychological distress and
psychological well-being and mental health index. The results showed that the
Serbian translation of the Authenticity Scale represents a reliable and valid
measure of authenticity.
The effects of the trefoil pedagogical approach on encouraging creative behaviour in students
Authors: Sefer Jasmina , Mirkov Snezana
Published: February 2017

?his paper presents a portion of the results obtained in a more extensive
study dealing with monitoring of the work methods and the effects of an
experimental implementation of the Trefoil pedagogical approach, developed
based on pedagogical theories by the researchers from Belgrade. The Trefoil
is based on using group work, creative play, openended tasks, critical
dialogue, research work and students? involvement in projects for which
teachers were trained through implementation and reflexive practice. The aim
of this longitudinal study is to determine the effects of the Trefoil on
encouraging initiative, cooperation and creativity in students. Research
participants were all teachers and students of an urban primary school during
one school year. Data on students? creative work were collected and compared
before and after the experiment, obtained by expert observation of classes
and a teacher and student questionnaire. Data were processed using one-way
analysis of variance for repeated measures and two-way mixed analysis of
variance. The results pointed to positive effects of the Trefoil approach,
which, according to qualitative data, could probably have been bigger if the
experiment had lasted longer. Different assessors noticed progress in
encouraging students? creativity, but in different domains. The results have
confirmed the justifiability of using the Trefoil approach, provided that its
validity is tested by implementation in other educational contexts for the
purposes of further research and enhancement of the initial conception.
Transformative potential of participatory research: Deconstructing power relations between a child and an adult
Authors: Vranjesevic Jelena
Published: February 2017

Transformative potential of participatory research with children as
participants is reflected in promoting the image of the child as an active
actor in the social community, an equal partner whose voice is heard and
appreciated, as well as in a critical reconsideration of an adult-centred
perspective in research, based on hierarchical power relations between
children and adults. The paper critically discusses the theoretical and
methodological grounds which serve as the basis for the adult-centred
perspective and analyses the factors that have significantly contributed to
the change in research paradigm when it comes to the status of children in
research: critical re-examination of methodology and objectives of certain
social sciences, the movements calling for the emancipation of marginalised
social groups and new policies in the field of protecting children?s rights.
Transformative potential of participatory research is discussed both from the
perspective of the role and position of adults in research process (adults?
responsibility: personal and epistemological reflexivity) and the
relationship between adults and children in research (the change of attitudes
towards children and redefining the traditional roles of adults and children:
the cooperative vs. hierarchical model of power), as well as in relation to:
the change in the position of research participants (children), visibility of
their perspective in public discourse and the development of competences and
values important for living in a democratic society.
The pedagogical concept of students of Teacher Education Faculty
Authors: Tadic Aleksandar , Maksimovic Aleksandar , Mrvos Ivana
Published: February 2017

The paper presents and analyses the results of the research dealing with the
pedagogical concept - as a type of pedagogical beliefs - related to the way
in which students, pre-service teachers, interpret the educational process
that they learn about during their studies and observe, analyse and create
during their practice. The aim of the conducted research was to determine the
intensity of the dimensions of students? pedagogical concept with respect to
gender, the type of finished secondary school and the year of studies.
Research participants were 480 students of the Teacher Education Faculty of
the University of Belgrade. There were no significant differences in the
intensity of the dimensions of the pedagogical concept between students of
different genders or with respect to the type of finished secondary school.
The results have indicated that the intensity of the child-centred dimension
of the pedagogical concept is significantly different at the beginning and at
the end of studies, and that it declines, but the decline is not linear. It
has been shown that child-centred pedagogical beliefs are more intensive in
the students at the beginning of studies than in the students of the final
year of studies. The concluding part provides the suggestions related to the
way in which theoretical contents and the modalities of teaching methods at
teacher education faculties might actively support the processes of
construction and reconstruction of students? pedagogical concept.
Construction and validation of a questionnaire on language learning motivation
Authors: Nikitina Larisa , Mohd Don , Cheong Sau
Published: February 2017

This article describes the steps and phases involved in constructing a
questionnaire on the motivation to learn a second or foreign language (or L2
motivation). It evaluates psychometric properties of the instrument by
performing exploratory and confirmatory factor analyses. Participants in this
study were 194 students. The results of the exploratory factor analysis
indicated that four dimensions formed the construct of L2 motivation, namely
Instrumental orientation, Integrative orientation, Commitment and Effort. The
findings from a subsequent confirmatory factor analysis validated the
four-dimensional structure. The conclusions reached by this study as well as
the steps and phases involved in the development of research instrument on L2
motivation could be informative for educators interested in issues related to
language learning motivation and useful for future scholarly investigations
of L2 motivation.
An exploration of acceptance of innovative computer use in teaching mathematics among pre-service class teachers and mathematics teachers
Authors: Milutinovic Verica
Published: February 2017

Innovative computer use enables the strengthening and transformation of
teaching practice. Notwithstanding, numerous studies have indicated that
teachers do not use computers in teaching mathematics to a sufficient extent.
This study was aimed at exploring the reasons for insufficient computer use
by teachers, i.e. at examining the variables which may affect the acceptance
of innovative computer use in teaching mathematics. Hence, the intention to
use computers in teaching mathematics in primary school was explored on the
sample of 455 pre-service class teachers and mathematics teachers from
Serbia. The technology acceptance model was extended by external variables
and the following were observed as the predictors of intention to use
computers in teaching mathematics: students? attitudes towards computers,
their perception of usefulness of computers in teaching mathematics,
perceived ease of use, technological pedagogical content knowledge in
mathematics, experience with use, subjective norms, technological complexity
and content knowledge in mathematics. Structural equation modelling has shown
that the proposed model had a good fit and that the selected variables were
significant predictors of the intention to use computers. The proposed model
explained 23.7% of variance in the intention to use computers. It has been
shown that the intention to use computers is directly predicted by dominant
technological pedagogical content knowledge in mathematics, students?
attitudes towards computers and their experience, while it is indirectly
predicted by perceived usefulness, subjective norm, technological complexity
and content knowledge in mathematics. In accordance with the presented
findings, the final part provides recommendations that may be beneficial for
advancing the education of pre-service class teachers and mathematics
teachers.
CHITINOLYTIC BACTERY ACTIVITY ISOLATED FROM THE MUD FIELDS
Authors: Herdyastuti Nuniek , Cahyaningrum Sari Edi , Raharjo Tri Joko , Mudasir Mudasir , Matsjeh Sabirin
Published: February 2017

A chitinolytic microorganism had been isolated from mud fields in Ketintang Surabaya area by using a minimal media containing 0.4% colloidal chitin. Activity assay is based on released N-acetyl-glucosamine which reacted with 3,5 dinitrosalicyclic acid. Mud fields produce 63 bacterial isolates with chitinase activity (TNH1 – TNH63 isolates). The highest activity was shown by TNH11 isolate with specific activity 1.27 U/mg. TNH11 isolates was Gram negative, rod-cocoid cell, has a colony of yellow, round shape, convex elevation, flat margin and the colony diameter 3–5 mm.
Isolasi, Pemurnian dan Karakterisasi Fitase Bacillus subtilis dari Holiwood Gresik
Authors: Yuanita Leny , Puspita Aline , Surodjo Suzana , Hidayati Sri , Amin Farid Al , Budiman Arif
Published: February 2017

The aim of the research were isolation, purification and characterization of Bacillus subtilis phytase from Holiwood Gresik. The research was done in two stages; the first include enzyme isolation, precipitation with amonium sulphate, dialysis, gel filtration chromatography, SDS-PAGE analysis, while second determining optimum pH, optimum temperature, the effect of pH and temperature to enzim stability, the values of KM and Vmax Bacillus subtilis phytase from Holiwood Gresik. The first stage research design were One Shot Case Study and Post Test Only Control Group Design, while the second stage were Post Test Only Control Group Design and Factorial Design. The data being analyzed by one-way and two-way Anova. The results of research showed that Bacillus subtilis phytase has the molecular mass of 36.5 kDa, optimum pH at 6.5–7.0, optimum temperature at 41° C and it was found to be stable for 30 minute incubation at pH 7 or 30° C with 2% or 3% lost of its activity respectively. KM value was 0.62 mM and VMax 0.393 mmol/ml/minute.
Determinant of Local Expenditure Quality Model and Relation with Local Development in East Java
Authors: Listiana Yufita , Juanda Bambang , Mulatsih Sri
Published: February 2017

This research aim is to analyze local expenditure quality in East Java based on five construct variables. Each construct variables consist of 40 indicators. This research use secondary data is Local Government Management Evaluation Report each region in East Java. Data of local development use poverty, unemployment, Gini index, economic growth, GDP per capita, and Human Development Index. This research uses analysis Structural Equation Modeling. It uses to know appropriate indicators to improve spending quality. The result shows that from 40 indicators just there are 21 indicators which have reached criteria good expenditure quality. Effectively has influence to expenditure quality more than 50% to describe model variation in local expenditure quality. It means that East Java has high financial effectively in increase public service because quality expenditure increasing continuously each year.
Technical Efficiency and Return to Scale in The Indonesia Economy During The New Order and The Reformation Governments
Authors: Muchdie Muchdie
Published: February 2017

This paper analyses technical efficiency and return to scale in the Indonesia economy during the year of 1967 to 2013. These range of years covering two eras of Indonesian government; the New Order era that lasted between the year of 1966 to 1998 and the Reformation era during the year 1998 to 2014. The analysis was also based on the Indonesia economy’s business cycle those categorised as Oil Booming Phase (1967-1981), Recession Phase (1982-1986), Deregulation Phase (1987-1996), Multidimension Crisis Phase (1997-2001) and Economic Recovery Phase (2002-1013). Using data on Gross Domestic Product based on constant price of the year 2000, capital stock with the same based year and employment (1967-2013), Cobb-Douglas production functions were exercised to calculate technical efficiency and  return to scale employing regression analysis tehniques. The results show that technical effiency during the New Order Goverment were better than those during Reformation Goverment.
A Comparative Study of Applying Active-Set and Interior Point Methods in MPC for Controlling Nonlinear pH Process
Authors: Syafiie Syam , Kwan Chia Yaw
Published: February 2017

A comparative study of Model Predictive Control (MPC) using active-set method and interior point methods is proposed as a control technique for highly non-linear pH process. The process is a strong acid-strong base system. A strong acid of hydrochloric acid (HCl) and a strong base of sodium hydroxide (NaOH) with the presence of buffer solution sodium bicarbonate (NaHCO3) are used in a neutralization process flowing into reactor. The non-linear pH neutralization model governed in this process is presented by multi-linear models. Performance of both controllers is studied by evaluating its ability of set-point tracking and disturbance-rejection. Besides, the optimization time is compared between these two methods; both MPC shows the similar performance with no overshoot, offset, and oscillation. However, the conventional active-set method gives a shorter control action time for small scale optimization problem compared to MPC using IPM method for pH control.
Membran Polisulfon untuk Pengolahan Air: Dengan dan Tanpa Pra Perlakuan Koagulasi secara Ultrafiltrasi
Authors: Arifin Bastian , Aprilia Sri
Published: February 2017

Membran polisulfon untuk pengolahan air telah dilakukan untuk mengurangi warna air dengan proses koagulasi dan tanpa proses koagulasi. Membran ultrafiltrasi polisulfone telah dikarakte-risasi dengan mengukur fluks, permeability (Lp), dan MWCO dengan bebagai variasi berat molekul dekstran. Morfologi membran diobservasi dengan scanning electron microscopy (SEM). Analisis SEM dilakukan terhadap permukaan membran dan penampang melintang membran. Proses koagulasi optimum dilakukan dengan menggunakan alat jar test, diperoleh kondisi optimum pada 50 ppm Al2(SO4)3 dan pH 7. Indeks warna rejeksi diperoleh dengan koagulasi adalah 85% dan tanpa koagulasi adalah 62%.
Produksi Bioplastik dari Sorgum dan Selulosa Secara Termoplastik
Authors: Darni Yuli , Sitorus Tosty Maylangi , Hanif Muhammad
Published: February 2017

Produksi bioplastik dari sorgum dan selulosa hasil ekstraksi rumput laut eucheuma spinosum dengan gliserol sebagai pemplastis secara termoplastik telah diteliti. Variabel yang diteliti adalah perbandingan massa pati sorgum dengan selulosa sebesar 10:0; 9,5:0,5; 8,5:1,5; 7,5:2,5; 6,5:3,5; 5,5:4,5 (w/w). Partikel pati sorgum dan selulosa berukuran lolos ayakan 63 ?m. Proses sintesis diawali dengan sonifikasi selama 60 menit pada suhu 80oC, dilanjutkan dengan gelatinisasi yang dijalankan di dalam reaktor batch berpengaduk pada kecepatan 916 rpm dan suhu 95oC selama 35 menit. Hasilnya dikeringkan di dalam oven bersuhu 60oC selama 8 jam. Hasil penelitian menunjukkan bahwa karakteristik bioplastik terbaik diperoleh ketika perbandingan massa pati-selulosa sebesar 6,5:3,5 (w/w). Bioplastik ini memiliki kuat tarik 11,53 kPa, perpanjangan 32,75%, Modulus Young 46,946 kPa, dan densitas 150 kg/m3. Film bioplastik ini dapat diaplikasikan untuk pengemas makanan dan industri obat-obatan.
Development of High-Productivity Continuous Ethanol Production using PVA-Immobilized Zymomonas mobilis in an Immobilized-Cells Fermenter
Authors: Nurhayati Nurhayati , Cheng Chieh-Lun , Chang Jo-Shu
Published: February 2017

Ethanol as one of renewable energy was being considered an excellent alternative clean-burning fuel to replace gasoline. Continuous ethanol fermentation systems had offered important economic advantages compared to traditional systems. Fermentation rates were significantly improved, especially when continuous fermentation was integrated with cell immobilization techniques to enrich the cells concentration in fermentor. Growing cells of Zymomonas mobilis immobilized in polyvinyl alcohol (PVA) gel beads were employed in an immobilized-cells fermentor for continuous ethanol fermentation from glucose. The glucose loading, dilution rate, and cells loading were varied in order to determine which best condition employed in obtaining both high ethanol production and low residual glucose with high dilution rate. In this study, 20 g/L, 100 g/L, 125 g/L and 150 g/L of glucose concentration and 20% (w/v), 40% (w/v) and 50% (w/v) of cells loading were employed with range of dilution rate at 0.25 to 1 h-1. The most stable production was obtained for 25 days by employing 100 g/L of glucose loading. Meanwhile, the results also exhibited that 125 g/L of glucose loading as well as 40% (w/v) of cells loading yielded high ethanol concentration, high ethanol productivity, and acceptable residual glucose at 62.97 g/L, 15.74 g/L/h and 0.16 g/L, respectively. Furthermore, the dilution rate of 4 hour with 100 g/L and 40% (w/v) of glucose and cells loading was considered as the optimum condition with ethanol production, ethanol productivity and residual glucose obtained were 49.89 g/L, 12.47 g/L/h, and 2.04 g/L, respectively. This recent study investigated ethanol inhibition as well. The present research had proved that high sugar concentration was successfully converted to ethanol. These achieved results were promising for further study.
Kinerja Upflow Anaerobic Fixed Bed Reactor dengan Media Penunjang Batu Apung dalam Penyisihan Organik dan Pembentukan Biogas dari Biowaste Fase Cair
Authors: Nursetyowati Prismita , Soewondo Prayatni , Handajani Marisa
Published: February 2017

Dalam penelitian ini, biowaste yang digunakan adalah sampah pasar. Sampah pasar menyumbang sekitar 12% dari berat total sampah kota. Upflow Anaerobic Fixed Bed Reactor (UAFB-R) yang digunakan dalam penelitian ini memakai media penunjang batu apung dengan resirkulasi efluen dan tanpa pengatur pH. Penelitian ini bertujuan untuk melihat kinerja UAFB-R dengan media penunjang batu apung dalam penyisihan organik dan pembentukan biogas terutama gas metan biowaste fasa cair. Hydraulic Retention Time UAFB-R ditentukan sebesar 6 hari dengan volume operasi sebesar 9 liter. Variasi beban organik influen dalam penelitian adalah ± 0,32 kg COD/m3.hari, ± 0,64 kg COD/m3.hari, ± 0,96 kg COD/m3.hari, ± 1,28 kg COD/m3.hari, ± 1,6 kg COD/m3.hari, dan ± 1,92 kg COD/m3.hari. Pada rentang beban organik influen ± 0,32 kg COD/m3.hari sampai ± 1,92 kg COD/m3.hari di kondisi tunak, semakin besar beban organik influen maka efisiensi penyisihan COD semakin kecil dan rasio TAV/Alkalinitas semakin besar. Namun, semakin kecil beban organik influen maka komposisi dan volume gas metan serta methane yield cenderung semakin besar. Saat variasi beban influen ± 0,96 kg COD/m3.hari dihasilkan volume gas metan terbesar sebanyak 1,77 liter, sedangkan saat variasi beban organik influen ± 0,64 kg COD/m3.hari dicapai komposisi gas metan dan methane yield terbesar sebesar 77,4% dan 0,249. Selain itu, semakin tinggi konsentrasi sulfat maka maka volume biogas yang terbentuk menjadi lebih kecil.
Simulasi Pengaruh Kandungan CO2 dalam Gas Umpan terhadap Reforming dan Shift Converter Sistem Pabrik Amoniak
Authors: Yusuf Jefry , Husin Husni , Marwan Marwan
Published: February 2017

Perubahan produksi dan pangsa pasar gas alam domestik maupun global mempengaruhi suplai terhadap pabrik pupuk-amoniak baik dari sisi jumlah, komposisi maupun harga. Kondisi ini memungkinkan pabrik amoniak menerima jenis gas alam berat kaya dengan CO2 (raw gas) maupun gas alam  ringan minim CO2 (treated gas). Pada penelitian ini telah dilakukan analisa pengaruh perubahan  komposisi gas alam terutama kandungan CO2 dengan variasi 0, 5, 10, 15, 20, 25, 30, 35, 40, 45 dan 50% vol terhadap operasional reforming dan shift converter sistem pabrik amoniak-2 PT. PI Mexisting dengan metodelogi simulasi mengggunakan Aspen HYSYS V8.0. Untuk memproduksi amoniak dengan jumlah yang sama, hasil studi menunjukkan penambahan CO2 dalam gas umpan akan meningkatkan pressure drop sistem, laju pembentukan komponen hidrogen turun sementara konsumsi energi bertambah di reforming, beban katalis shift converter dan beban feed gas compressor meningkat. Kandungan CO2 sebesar 7% vol masih mungkin diaplikasikan, mengingat ada batasan beban peralatan.
Aplikasi Metode Advance Oxidation Process (AOP) Fenton pada Pengolahan Limbah Cair Pabrik Kelapa Sawit
Authors: Yulia Ruka , Meilina Hesti , Adisalamun Adisalamun , Darmadi Darmadi
Published: February 2017

Penelitian ini bertujuan untuk mengetahui kemampuan proses Fenton dalam menurunkan kadar chemical oxygen demand (COD) dan kadar total suspended solid (TSS) dari limbah cair pabrik kelapa sawit (PKS) dan menentukan kondisi optimum dari parameter yang digunakan dengan Response Surface Methodology menurut Box- Behnken design. Sampel diambil pada keluaran pertama kolam anaerobik ketiga dari instalasi pengolahan limbah cair kelapa sawit yang mengandung nilai COD berkisar antara 8.000 hingga 12.000 ppm. Pada penelitian ini, dilakukan pengujian pada berbagai pH, konsentrasi FeSO4.7H2O dan konsentrasi hidrogen peroksida. HasilÂ  penelitian menunjukkan bahwa kemampuan proses AOP dengan metode Fenton dapat menurunkan konsentrasi COD dan TSS masing-masing adalah 70,7704% dan 88,3897% pada konsentrasi FeSO4.7H2O 3703,52 ppm, konsentrasi H2O2 5586,43 ppm, dan pH 3.
Sanitary Landfilling – A Key Component of Waste Management
Authors: Fellner Johann
Published: February 2017

In many affluent countries waste management is experiencing a fast transition from landfilling to sophisticated recycling and waste to energy plants. Thus, landfilling of waste becomes less important in these countries. The present paper discusses whether a similar development will take place in transition economies, or waste management systems will mainly rely on landfilling in the near future. For this purpose, the current waste management practices and associated environmental impacts as well as the economic situation of different countries in economic transition are analyzed. Based on the status quo, scenarios for improving waste management are developed and evaluated. Criteria for evaluation are economic parameters, and indicators pointing out if the goals of waste management (protection of human health and the environment, the conservation of resources), are reached. Based on the results of selected case studies, it is shown that for regions that can afford less than 20 €/capita and year for waste management, landfilling will remain a key component of waste management, since other disposal options such as waste to energy or mechanical biological pretreatment are too expensive. In addition, the results indicate that in many of these countries waste collection still represents a main challenge.
Pengaruh Konsentrasi Substrat Kulit Nanas dan Kecepatan Pengadukan terhadap Pertumbuhan Lactobacillus plantarum untuk Produksi Asam Laktat
Authors: Febriningrum Panca Nugrahini
Published: February 2017

One of the alternative utilization of pineapple peel waste is to convert them to lactate acid via fermentation. This research is aimed to obtain better understanding on the growth of lactate bacteria (Lactobacillus plantarum)  by varying substrate concentration:  100 g/L - 600 g/L and stirring rate of 50 rpm, 150 rpm, and 250 rpm. The growth of anaeroic process was performed without pH controlling with initial pH of 5 and temperature of 28OC.  Pineapple peel was used as the substrate after romoving water content using ammonium dihydrogen phosphate.  Cell growth was analyzed by calculating the total of microorganism cell using hemocytometer. In order to determine lactate acid production, glucose concentration was analyzed using spectrophotometer. Nelson-Somogy method was employed in this analysis. Ethanol concentration was also analyzed by calculating the titration of acid lactate concentration. The optimum growth of Lactobacillus plantarum was found at 28oC, stirring rate of 150 rpm and substrate concentration of 500 g/L contributing to the total cell  of  3,85.108, 1,13.109, and  4,00.108  for lag, exponential, and decrease phase respectively.  Further analysis carried out based on stirring rate of 150 rpm and substrate concentration of 500 g/L resulted in the largest average concentration of lactate acid of 1.620% v/v with glucose consumption percentage of 51,76%.Keywords: pineapple peel, Lactobacillus plantarum, lactate acid
Feasibility of In-Situ Aeration of Old Dumping Ground for Land Reclamation
Authors: Tong Huan-Huan , Yin Ke , Chia Charles Yong-Han , Ahmad Omar , Xin Ling , Wang Jing-Yuan
Published: February 2017

Dumping grounds are characterized by the absence of engineering controls such as base liners and cover layer. Consequently, these dumping grounds present risks for surrounding resources such as soil, groundwater and air. The concern for groundwater contamination by leachate from tropical dumping grounds is heightened due to the greater amounts of rainfall and subsequent infiltration and percolation through the waste mass. The emergent demand for old dumping grounds reclamation drives the need to employ remediation technologies. Generally, in-situ aeration is a remediation method that promotes aerobic conditions in the later stage of dumping ground. It accelerates carbon transfer, reduces remaining organic load, and generally shortens the post closure period. However, high rainfall in tropical areas straitens this technique. For example, pollutants could be easily flushed out and more energy should be required to overcome hydrostatic pressure. Although heavy rainfall could supply sufficient water to the substrate and accelerate degradation of organic matter, it may inhibit aerobic activities due to limited air transfer. The waste characterization from Lorong Halus Dumping Ground (closed dumping ground in Singapore) showed that the waste materials were stabilized after 22 years closure. According to the Waste Acceptance Criteria set by European Communities Council, the waste materials could be classified as inert wastes. One interesting finding was that leachate layer detected was about of 5 - 8 meter depth, which entirely soaked the waste materials. Hence, the reclamation design and operation should be carefully adjusted according to these characters. Lorong Halus Dumping Ground case study can provide a guideline for other tropical closed landfills or dumping grounds.
Pemanfaatan Zeolit Alam Teraktivasi untuk Adsorpsi Logam Krom (Cr3+)
Authors: Emelda Lisanti , Putri Suhardini Martiana , Ginting Simparmin
Published: February 2017

Pertukaran ion antara Cr3+ dan H+ menggunakan zeolit sebagai penukar ion adalah salah satu metode untuk memurnikan air dari ion kromium. Zeolit adalah senyawa aluminosilikat tetrahedral dengan struktur ikatan 3-dimesi, memiliki pori bagian dalam, dan luas permukaan yang tinggi, karena itu dapat digunakan sebagai adsorben. Tujuan penelitian ini adalah untuk mengevaluasi pengaruh waktu kontak optimum, suhu, dan konsentrasi kromium terhadap kapasitas penyerapan. Tahap pertama adalah mencampur zeolit yang telah diaktifkan dengan larutan kromium (10 ppm kromium) dalam tangki berpengaduk pada 25oC. Selanjutnya larutan diambil setiap 60 menit hingga konsentrasi residu larutan kromium konstan. Proses adsorpsi dilangsungkan pada suhu berbeda yaitu:  25, 30, 35, 40, 45, dan 50 oC. Untuk uji adsorpsi isotermal, pada suhu dengan hasil penyerapan terbaik divariasikan konsentrasi kromiumnya yaitu: 10, 20, 40, 60, dan 100 ppm. Dosis adsorben yang digunakan adalah 3 gram adsorbent/200 mL larutan krommium dengan kecepatan pengaduk 240 rpm. Larutan kromium dideteksi dengan menggunakan Atomic Absorption Spectroscopy (AAS) atau Spektroskopi Serapan Atom. Waktu kontak optimum diperoleh 3 jam menggunakan zeolit yang diaktifkan dengan asam, diperoleh nilai adsorpsi optimum 99,275%. Proses adsorpsi berjalan secara eksoterm, memiliki ?Ho = -3.9574,6 J/mol dan ?So = -117.227 J/moloK. Model isotermal adsorpsi mengikuti isoterm Freundlich menurut persamaan Qe = 0,044463C1/2,5125, kapasitas penyerapan Kf = 0,044463 mmol/gram adsorben, dan intensitas adsorpsi n = 2,5125.
Kombinasi Proses Koagulasi dan Sistem Ultrafiltrasi dengan Membran Poliakrilonitril untuk Pemurnian Air Berwarna
Authors: Aprilia Sri , Arifin Bastian , Anugerah Ricky Rivaldi , Safriadi Indra
Published: February 2017

Penelitian pengolahan air berwarna berdasarkan proses koagulasi dan ultrafiltrasi dengan membran poliakrilonitril (PAN) telah dilakukan. Studi ini bertujuan untuk membuat dan mengevaluasi karakteristik membran PAN untuk aplikasi pada pengolahan air berwarna. Membran PAN berbentuk plat dibuat dengan melarutkan polimer PAN kedalam dimetilformamida (DMF). Konsentrasi PAN divariasikan pada 15, 20, dan 25 (% berat). Membran yang dihasilkan selanjutnya dikarakterisasi untuk parameter struktur morfologi dengan scanning electron microscopy (SEM), fluks dan rejeksi larutan menggunakan modul filtrasi tipe dead-end. Selanjutnya dilakukan uji molecular weight cut-off (MWCO) membran menggunakan larutan dekstran dengan berat molekul 9500, 19500, dan 39000 Da. Hasil uji SEM menunjukkan bahwa membran mempunyai pori dengan struktur asimetrik. Uji ultrafiltrasi yang diawali dengan proses koagulasi dapat merejek warna air 92,5%, dengan perolehan fluks mencapai 364,8 ml/m2.s.
Ekstraksi Oleoresin dari Limbah Penyulingan Pala Menggunakan Ultrasonik
Authors: Arpi Normalina , Satriana Satriana , Rezekiah Kiki
Published: February 2017

Penelitian ini bertujuan untuk mempelajari pengaruh ukuran partikel limbah penyulingan pala (Myristica fragrans Houtt.) dan suhu ekstraksi terhadap rendemen dan mutu oleoresin pala yang dihasilkan pada proses ekstraksi pelarut menggunakan bantuan ultrasonik. Etanol mutu teknis (technical grade) digunakan sebagai pelarut. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) Faktorial dengan ulangan sebagai kelompok yang terdiri dari ukuran partikel bahan (P) yaitu P1= 10 mesh, P2= 40 mesh dan P3= 60 mesh dan suhu ekstraksi (S) yaitu S1= 40oC, S2= 50oC dan S3= 60oC. Analisis oleoresin pala yang dilakukan meliputi analisis awal (kadar air dan kadar abu) dan analisis akhir (bobot jenis, indeks bias, dan sisa pelarut). Hasil penelitian menunjukkan ukuran partikel dan suhu ekstraksi berpengaruh terhadap rendemen dan mutu oleoresin yang dihasilkan. Rendemen tertinggi sebesar 7,16% diperoleh pada  ukuran partikel 10 mesh dan suhu 60oC. Hasil analisis bobot jenis oleoresin menunjukkan bahwa bobot jenis tertinggi yaitu 1,250 dihasilkan pada suhu ekstraksi 50oC. Sementara itu, hasil analisis indeks bias oleoresin menunjukkan bahwa ukuran partikel dan suhu ekstraksi memberikan pengaruh yang sangat nyata terhadap oleoresin pala dimana ukuran partikel 40 mesh pada suhu ekstraksi 40oC dan 60oC  serta ukuran partikel 60 mesh pada suhu 50oC memiliki nilai indeks bias yang lebih tinggi yaitu berkisar antara 1,476 hingga 1,480. Hasil analisis sisa pelarut juga menunjukkan bahwa ukuran partikel dan suhu ekstraksi berpengaruh terhadap tingginya sisa pelarut, dimana ukuran partikel 10 mesh mengandung sisa pelarut 0,229% dan suhu ekstraksi 40oC mengandung sisa pelarut 0,265%.
Design e materiais: estudo de caso do prendedor de roupa
Authors: Calegari Eliana Paula , Santos Sandra Souza dos , Oliveira Branca Freitas de , Júnior Wilson Kindlein
Published: February 2017

O presente artigo caracteriza cinco prendedores de roupa com preços de venda distintos. O objetivo foi verificar se o valor de venda do produto final estava diretamente relacionado com a variedade dos materiais e processos utilizados durante a fabricação do prendedor de roupa. Desta forma, esta análise é interessante no sentido de promover uma melhor compreensão dos produtos, dos materiais e processos envolvidos no desenvolvimento de novas alternativas a fim de otimizar soluções para novos projetos.
Uma abordagem para digitalização de figuras humanoides visando animação computadorizada
Authors: Piratelli-Filho Antonio , Cassiano Erlan Rodrigo S. , Viana Dianne M. , Zamboni Julia Ghorayeb
Published: February 2017

Este artigo apresenta uma abordagem para a digitalização de protótipos humanoides e criação de modelos de Projeto Auxiliado por Computador (CAD). Dois protótipos foram utilizados, sendo o primeiro um boneco de madeira construído com elementos geométricos e o segundo uma escultura de gesso com detalhes anatômicos e textura. A digitalização foi feita em uma Máquina de Medir por Coordenadas modelo Braço de Medição (CMA) com sonda de contato,  sendo determinados pontos nas superfícies aplicando estratégias diferentes em cada medição. A construção dos modelos CAD foi feita ajustando curvas e superfícies NURBS (B-splines racionais não uniformes) aos pontos determinados. A qualificação das superfícies obtidas foi verificando a magnitude dos desvios dos pontos medidos em relação às respectivas superfícies dos protótipos. A técnica empregada se mostrou adequada para digitalização de peças complexas quando existe a exigência de precisão do modelo CAD.
PENGARUH KUALITAS PELAYANAN DAN KEWAJARAN TARIF TERHADAP NILAI KONSUMEN SERTA RETENSI PELANGGAN UNTUK PENERBANGAN DOMESTIK NIAGA FULL SERVICES DI INDONESIA
Authors: Soelasih Yasintha
Published: February 2017

Competition in the airline industry is very high. This can be seen that there are so many enterprises in this industry. There is a change in the legacy carriers to low cost carriers. Companies that still maintain the legacy carriers will have an impact on higher rates charged to passengers compared to the low cost carriers. Therefore the companies that use the legacy carriers should be able to provide better services than the companies that use low cost carriers. The companies should pay attention to service quality and fairness of tariffs, so that consumers perceived value to these companies are much more higher than to the company that using low cost carriers. As a result, customer retention occurs.
PENGARUH STRUKTUR KEPEMILIKAN DAN DEWAN KOMISARIS INDEPENDEN TERHADAP NILAI PERUSAHAAN (STUDI PADA PERUSAHAAN INDUSTRI BARANG KONSUMSI DI BEI TAHUN 2011â€“2013)
Authors: Dewi Laurensia Chintia , Nugrahanti Yeterina Widi
Published: February 2017

The objective of this study is to examine the influence of management ownership, institutional ownership and board of independent commissioners on firm value. This study focus on consumer goods companies listed in Indonesia Stock Exchange in 2011 until 2013. Firm value in this study proxied by Tobinâ€™s Q. Sampling techniques in the study conducted by purposive sampling technique. A total of 36 the consumer goods companies used as a sample. The technique of analysis of this study used multiple regression. The results of this study indicate that the variable that affect the firm value is board of independent commissioners. While variables that did not affect the firm value is management ownership and institutional ownership.Keywords: Firm value, management ownership, institutional ownership and board of independent commissioners.
UMA DISCUSSÃO SOBRE POLÍTICA CIENTÍFICA & TECNOLÓGICA NO BRASIL NO GOVERNO FERNANDO HENRIQUE CARDOSO (1995-1998)
Authors: Pereira Meira Chaves
Published: February 2017

A obra apresenta dados e contexto das políticas públicas que envolvem o investimento em ciência, tecnologia e inovação e os condicionantes econômicos e sociais, problematizados em pesquisa desenvolvida por Paulo Gomes Lima. O segundo governo de Fernando Henrique Cardoso é ênfase no aprofundamento da leitura do objeto. Trajetória que o autor desenvolve com dados e comparações.
ÉTICA E PESQUISA EM EDUCAÇÃO E TRABALHO
Authors: Fagiani Cílson César , França Robson Luiz de
Published: February 2017

A preocupação com a ética na pesquisa em ciências humanas, especialmente na área da Educação, é algo recente e vem suscitando uma série de questões que vão desde a pertinência de se pensar sobre a questão ética até as formas de sua normatização. A questão ética em pesquisas nas ciências humanas e particularmente nas pesquisas educacionais deve ser preocupação constante entre os pesquisadores. Não é o caso de negar a necessidade de normas e regras que regulamentem as pesquisas científicas qualitativas, mas preocupar-se que isso não seja apenas uma prática jurídica, muitas vezes meramente burocrática em busca de um controle ético. Tendo em vista essas questões, o artigo tem por objetivo trazer à luz algumas considerações e instigar o debate sobre a ética relacionada à pesquisa educacional.
A FUNDAÇÃO DA UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ NO CONTEXTO DE EXPANSÃO DA EDUCAÇÃO SUPERIOR
Authors: Silva Junior João dos Reis da , Czernisz Eliane Cleide da Silva
Published: February 2017

Este texto analisa a fundação da Universidade Tecnológica Federal do Paraná - UTFPR - no contexto de expansão da educação superior. Questiona as principais mudanças ocorridas nesse processo e discute a atual configuração da instituição. Utiliza pesquisa bibliográfica, análise de documentos normativos da educação superior e de documentos da UTFPR bem como dados obtidos em entrevistas. Inicia, apresentando a UTFPR em meio às recentes alterações ocorridas no processo de expansão. Entre os resultados, destaca que as principais alterações efetivadas na UTFPR se desenvolveram notadamente, impulsionadas pela pós-graduação e encontram-se em consolidação com a implementação do REUNI, em que se dá ênfase aos cursos de licenciatura e bacharelado.
FORMAÇÃO CONTINUADA NO ESTADO DE MATO GROSSO NO CONTEXTO DAS POLÍTICAS PÚBLICAS EDUCACIONAIS
Authors: Gobatto Marcia Regina
Published: February 2017

A formação continuada de professores é colocada em pauta neste estudo que tem por objetivo destacar o papel do Centro de Formação e Atualização dos Profissionais da Educação Básica de Mato Grosso (Cefapro/MT) no contexto das políticas nacionais de formação. Procurou-se reconstituir cronologicamente a trajetória do referido centro, indicando o contexto de sua origem, seus objetivos, sua estrutura administrativa e orientação pedagógica. Os dados indicam que ocorreram mudanças na nomenclatura a partir dos posicionamentos assumidos em relação às suas finalidades. Os dados foram buscados em textos oficiais da legislação brasileira e estadual. As análises indicam que a iniciativa de criação do Cefapro/MT se deu no contexto de uma escola pública e posteriormente foi assumida como uma política de Estado para a formação continuada de todos os profissionais da educação.
ÁLVARO VIEIRA PINTO
Authors: Mainardes Jefferson
Published: February 2017

O artigo apresenta uma análise das ideias pedagógicas do filósofo e educador brasileiro Álvaro Borges Vieira Pinto (1909-1987), a partir de suas obras. Argumenta que as ideias de Vieira Pinto sobre o conceito de educação, concepções ingênua e crítica de educação, alfabetização de adultos, relação pedagógica, teoria pedagógica e reforma universitária são ainda atuais e relevantes. O artigo apresenta também uma breve biografia de Álvaro Vieira Pinto e um histórico do Instituto Superior de Estudos Brasileiros – ISEB, onde ele desenvolveu uma parte significativa do seu pensamento e algumas de suas principais obras.
REFLEXÕES HISTÓRICAS SOBRE ADMINISTRAÇÃO PÚBLICA E A ESCOLA NO BRASIL
Authors: Lana Rita De Cássia
Published: February 2017

Pretende-se analisar neste texto algumas peculiaridades na trajetória histórica do desenvolvimento da administração pública brasileira, visando iluminar aspectos relevantes para a reflexão sobre instituições escolares que sejam complementares ao pensamento educacional, em uma perspectiva teórica weberiana sobre a burocracia e suas implicações no caso brasileiro.
UMA CONVERSA SOBRE FUNDAMENTOS DA EDUCAÇÃO: RECORTES E DISCUSSÕES. VOL. IV
Authors: Toubia Ariane Andreia Teixeira
Published: February 2017

O quarto volume do livro Fundamentos da Educação: Recortes e Discussões tem como pauta central os principais objetos que a escola deveria apresentar posicionamentos: o desenvolvimento do conhecimento e produção humana e a capacidade do homem em situar-se como ator social no mundo contemporâneo marcado por tensões. Foi publicado pela Paco Editorial em 2015 e reúne 377 páginas, sendo constituído por sumário, apresentação, dezenove capítulos e referências bibliográficas.
LAICIDADE E RELIGIÕES DE MATRIZES AFRICANAS NA ESCOLA
Authors: Müller Tânia Mara Pedroso , Costa Ana dos Anjos Santos
Published: February 2017

Este artigo apresenta os resultados de uma pesquisa realizada com professoras/es de história, cujo objetivo era desvelar suas concepções sobre laicidade e religiosidade na escola e compreender se suas posições interferem nas relações sociais, no combate à discriminação religiosa e na promoção do respeito às diferenças e a diversidade cultural. Foram empregados procedimentos metodológicos etnográficos, observação do cotidiano e aplicação de questionário a professoras/es de História de uma escola municipal do Estado do Rio de Janeiro que cursavam uma especialização em ensino de História numa Universidade Federal do Rio de Janeiro - UFRJ. Constatamos que existem lacunas na compreensão do conceito de laicidade e religiosidade na escola e defendemos que os mesmos devem estar presentes nos currículos dos cursos de formação de professoras/es, principalmente nos cursos voltados para a escola pública. A educação intercultural seria um caminho, uma vez que evidencia uma nova consciência dos direitos as diferenças.
Samband tryggðar og ánægju viðskiptavina með þjónustu á fyrirtækjamarkaði
Authors: Hermannsdóttir Auður , Kristjánsdóttir Svanhildur Ásta
Published: February 2017

Rannsóknir hafa sýnt fram á jákvætt samband tryggðar viðskiptavina og árangurs fyrirtækja á mörgum sviðum. Það ætti því að vera markmið stjórnenda að auka tryggð viðskiptavina eða fjölda þeirra sem eru tryggir fyrirtækinu. Vitað er að forsenda þess að viðskiptavinur geti verið tryggur er að hann sé ánægður með fyrirtækið og þjónustu þess og eftir atvikum vörur. Sambandið á milli ánægju viðskiptavina og tryggðar hefur töluvert verið rannsakað á einstaklingsmarkaði en mun færri rannsóknir hafa verið gerðar á viðfangsefninu á fyrirtækjamarkaði. Markmið rannsóknarinnar var að kanna hversu sterk tengsl eru á milli ánægju viðskiptavina með þjónustu og tryggðar á markaði fyrir prentþjónustu. Rannsóknareiningin var rótgróið íslenskt fyrirtæki sem hefur fjölbreyttan viðskiptavinahóp. Rafrænn spurningalisti var sendur á viðskiptavini fyrirtækisins þar sem ánægja þeirra með þjónustuna og tryggð var mæld. Niðurstöðurnar sýndu að tengsl ánægju og tryggðar voru jákvæð, en veik. Jákvæð veik tengsl reyndust vera á milli ánægju og ætlaðra endurkaupa, mjög veik neikvæð tengls milli ánægju og neikvæðs umtals og miðlungs sterk jákvæð tengsl á milli ánægju og meðmæla með fyrirtækinu. Niðurstöðurnar benda til þess að ekki sé munur á verðteygni eftir því hvort viðskiptavinir eru ánægðir eða óánægðir með þjónustuna. Rannsóknin gefur tilefni til að ætla að ef stjórnendur á prentmarkaði hyggjast ná fram tryggð og þeim ávinningi sem hún getur skilað fyrirtækjum, þá þurfi að tryggja mikla ánægju viðskiptavina með þjónustugæðin.
Stefna í reynd í litlu íslensku hátæknifyrirtæki
Authors: Steinþórsson Runólfur Smári , Sigurjónsdóttir Sandra Margrét
Published: February 2017

Greinin fjallar um stefnu íslenska hátæknifyrirtækisins Völku með hliðsjón af kenningum um stefnu í reynd (e. strategy as practice). Rannsóknin er bæði leitandi og lýsandi í senn og er í henni ljósi varpað á það með hvaða hætti stefna hjá Völku hefur myndast bæði í skipulögðu stefnumiðuðu starfi og eftir sjálfsprottnum leiðum. Með hliðsjón af fræðunum og rannsókninni á Völku er sett fram líkan sem dregur fram kjarnaatriðin í stefnu í reynd. Þessi atriði má sjá í samspili á milli iðkenda (e. practitioners), starfshátta (e. practices) og iðkunarinnar (e. praxis) í stefnumiðuðu starfi Völku. Þetta líkan er á frumstigi en það gefur mynd af hinu stefnumiðaða starfi og tilgátan er að það geti nýst til frekari rannsókna. Horft er sérstaklega til samspilsins á milli framlags og virkni iðkenda og þess hversu fjölbreyttir og formlegir starfshættir fyrirtækisins eru. Þá var skoðað hvernig umsvif fyrirtækisins hafa þróast í samhengi við tengsl þess við viðskiptavini. Hér er um fyrstu rannsókn í röð rannsókna á íslenskum fyrirtækjum að ræða sem ætlað er að varpa ljósi á það hvernig stefnumiðað starf fer fram í raun og veru í íslenskum fyrirtækjum.