bluuebunny/crossref_metadata_2025 huggingface dataset:
Relire Siegfried Kracauer (entre les lignes)
Authors: Arnoldy Édouard
Published: March 2017

Avec Théorie du film (1960) et l’Histoire : des avant-dernières choses (1966), Siegfried Kracauer élabore une théorie inédite du film et de l’histoire. En les envisageant ensemble, il contribue sans doute à la consolidation de ce que Walter Benjamin désigne comme la nécessaire « armature théorique » de l’histoire, en particulier ici celle des « médias photographiques ». L’idée d’histoire chez Kracauer, des années 1930 jusqu’aux années 1960, est celle dont Walter Benjamin définit les contours dans Sur le concept d’histoire où, prise entre les feux des pensées de Marx et de Nietzsche, sa réflexion le conduit à considérer que la théorie est ce qui fait principalement défaut à l’historicisme. La (re)lecture des écrits de Kracauer invite à porter un regard critique sur l’histoire du cinéma aujourd’hui (hantée par ses démons historicistes quand elle redore le blason du factuel et de l’évolution en histoire ou qu’elle promeut des projets si larges qu’ils ne visent, au fond, qu’une histoire universelle, totale et prétendûment définitive). Parce qu’il sont largement déterminés par des questions d’histoire et d’intermédialité, les écrits de Kracauer offrent des outils propres à l’étude des croisements du cinéma et des « nouveaux médias » (le jeu vidéo, les séries, le web-cinéma, etc.). La lecture kracauérienne des films ne cesse en effet d’interroger leur fidélité au cinéma et leurs affinités avec d’autres pratiques, se focalisant sur les points de tension qui particularisent certains d’entre eux, ces « fissures » qu’il observe dans des films en équilibre instable entre cinéma et théâtre, roman ou peinture, documentaire et expérimental ou fiction.
Research on the Intelligent Warehouse Management System Based on Near Field Communication (NFC) Technology
Authors: Ye Liu , Wang Yuhan , Chen JiaHui
Published: March 2017

With the continuous development of retail and logistics, enterprise inventory management has become more and more complex, the traditional management mode can't meet the requirements of modern enterprise inventory management. In the environment of Internet of things, a kind of intelligent warehouse management system based on NFC is studied, which can realize the real time intelligent management of logistics. This paper design the NFC tags to store the warehouse information, freight car information, superior management order, etc., and read it by a smart android mobile terminal which support NFC, then through the communication network to transmit data information, to achieve NFC tag registration, data acquisition, content input, real-time data upload by scanning card, record management, query statistics and analysis report, which is an intelligent warehouse management system. It meets the requirements of modern logistics management, create more economic benefits for the enterprise, and has great realistic significance to promote the economic development of the logistics industry.
Design and Implementation of Employment Management System Based on B / S
Authors: Xia Pengcheng , Li Tianze , Gao Tao , Wang Yuhan
Published: March 2017

As society progresses with computer technology, the rapid development of network technology, data, and information technology has become the development trend in today's society. How to improve college employment rate and improve their own competitiveness is a problem faced by many universities. At present, most graduates are accustomed to finding suitable employers through the Internet platform, a way to communicate with students in a timely and effective manner. This system provides a platform for the college to communicate with students, publish employment information of employers, and maintain employment information platform for students. Through student self-maintenance methods to save students and schools, employment units direct communication costs. The system uses Java, WEB and Ajax technology to school statistics, recruitment of employers, students work together to build B / S structure of the site. This website statistics college employment rate, the use of units, schools and students need information.
Speech Content Authentication Scheme based on High-Capacity Watermark Embedding
Authors: Sun Fang , Liu Zhenghui , Qi Chuanda
Published: March 2017

The existed content authentication schemes based on digital watermark have some shortcomings. In order to solve the problems, a speech content authentication scheme based on high-capacity watermark embedding is proposed, and the high-capacity embedding method is discussed. Firstly, speech signal is framed and segmented, and the samples of each segment are scrambled. Secondly, DCT is performed on the scrambled signal, and low-frequency coefficients are selected as the watermark embedding domain. Lastly, frame number is mapped to a sequence of integers and embedded into the domain based on the embedding method. Theoretical analysis and experimental evaluation results show that the proposed algorithm is inaudible, robust to desynchronous attacks, enhances the embedding capacity, and improves the security of watermark system.
On the Pixel Expansion of Visual Cryptography Scheme
Authors: Guo Teng , Jiao Jian , Liu Feng , Wang Wen
Published: March 2017

In this paper, we first follow Ateniese et al.'s work that provides upper bounds of the pixel expansion of visual cryptography schemes(VCSs) for more kinds of graph access structures, in which we require that a subset of parties can determine the secret if they contain an edge of the graph G. The constructive upper bounds are derived by the graph decomposition technique. Then we generalize Ateniese et al.'s method of comparing the optimal pixel expansion of VCSs with two different access structures.
Cuckoo Search Optimized Reduction and Fuzzy Logic Classifier for Heart Disease and Diabetes Prediction
Authors: Gadekallu Thippa Reddy , Khare Neelu
Published: March 2017

Disease forecasting using soft computing techniques is major area of research in data mining in recent years. To classify heart and diabetes diseases, this paper proposes a diagnosis system using cuckoo search optimized rough sets based attribute reduction and fuzzy logic system. The disease prediction is done as per the following steps 1) feature reduction using cuckoo search with rough set theory 2) Disease prediction using fuzzy logic system. The first step reduces the computational burden and enhances performance of fuzzy logic system. Second step is based on the fuzzy rules and membership functions which classifies the disease datasets. The authors have tested this approach on Cleveland, Hungarian, Switzerland heart disease data sets and a real-time diabetes dataset. The experimentation result demonstrates that the proposed algorithm outperforms the existing approaches.
A Framework for Applying CSFs to ERP Software Selection
Authors: Gupta Rekha , Naqvi S. Kazim
Published: March 2017

The literature review studies on ERP system indicate two main areas of thrust: the study of critical success factors for the risk aversion in ERP implementation projects and the ERP system selection studies. However, ERP system selection is a tedious and a time-consuming activity. The critical success factors (CSFs) serve as vital input ingredients to the ERP selection Models. It is however notable that, that none of the CSFs listing propagated by the researchers find a straightforward application in the selection procedure. The paper bridges the gap between the two thrust areas by proposing a framework for applying the prioritized CSFs listed for direct utilization in the selection process. An exhaustive review on the ERP selection techniques reveals the focus on AHP and/or the Fuzzy Logic approaches to ERP selection problem. A new approach to ERP selection problem with the extensions of the Fuzzy-TOPSIS is subsequently introduced and is illustrated by a solved numerical example. Also, the computational simplicity of the extensions of Fuzzy TOPSIS is demonstrated.
Application of Signal Processing in GPS Signal Detection Using USRP
Authors: Sheybani Ehsan , Javidi Giti
Published: March 2017

The Universal Software Radio Peripheral (USRP) is slowly becoming a very popular piece of hardware used in different universities and research labs across the world. It is inexpensive, which attracts a lot of attention, along with its variety of applications and capabilities. The USRP connects to a host-computer through a high-speed USB or Gigabit Ethernet interface. Another reason for the increasing popularity of the USRP is its ability to respond to multiple programming software such as GNU Radio, Matlab/Simulink, and LabView. There is a broad range of capabilities of the USRP one of which includes receiving GPS signals. Each GPS satellite transmits data on two frequencies, L1 (1575.42 MHz) and L2 (1227.60 MHz). We focused on the L1 band that transmits at 1575.42 MHz. The main objective was to engage in signal analysis with the carrier signal of the L1 band. This task proved to be challenging but not impossible. The carrier signal is essentially to carry information modulated on to it; in this case the navigation message from the GPS satellite along with other codes that are irrelevant to use at this point. After receiving the signal via USRP and with a simple extraction of the carrier signal, we were able to record the signal and reconstruct it using its In-phase and Quadrature phase (IQ) data. With just the carrier signal, one is able to do multiple things. One can modulate his/her own information onto the signal and transmit it through the USRP. Further analysis on the characteristics of the signal can be done. For example, one can compare the strength of a direct to the indirect signal. In theory, one can determine the characteristics of the surrounding area when comparing direct and indirect carrier signal. The possibilities are endless.
Evaluating the Impacts of Lean Management Practices in Healthcare via Simulation
Authors: Calogero Antonio , Longo Francesco , Nicoletti Letizia , Padovano Antonio
Published: March 2017

Lean management has proved to be the preferred way of managers who strive for achieving performances comparable to that of the Toyota Company that firstly applied the “no wastes” philosophy. In healthcare, managers look at reducing the patients' waiting times and management costs, increasing productivity and optimizing the resources allocation. In order to build consensus about the effectiveness of lean practices, two simulation models representing the two costliest departments of a public healthcare facility in Southern Italy (an Elective Surgery Department and the Intensive Care and Resuscitation Unit) have been developed. The simulation models have been equipped with built-in functions capable of implementing different lean policies (e.g. 5S method, visual management, kanban method, pull system) which supports planning and patients' scheduling activities. Simulated results ensure managerial advantages (e.g. resources' utilization levels), savings (e.g. overtime costs) and improved customer satisfaction (e.g. patients' waiting times and waiting lists' lengths).
Tetragonal and Monoclinic Phase Transformation of ZTA-MgO Ceramic Cutting Tool by Machining Process
Authors: Ali Afifah , Azhar Ahmad Zahirani Ahmad , Abdullah Norazharuddin Shah , Ratnam Mani Maran , Ahmad Zainal Arifin
Published: March 2017

The purpose of this study is to investigate the phase transformation route of ZTA-MgO ceramic cutting tool in raw powder form, after sintering process and after machining process. This is to evaluate the effect of phase transformation to the properties of the cutting tool i.e hardness and fracture toughness. Samples of ZTA-MgO ceramic cutting insert were fabricated by wet mixing the materials, and then dried at 100°C before crushed into powder. The powder was pressed into rhombic shape and sintered at 1600°C at 4 hours soaking time to yield dense body. To study the effect of the phase transformation of the fabricated tool, machining was performed on the stainless steel 316L at 2000 rpm cutting speed. XRD analysis were performed on three type of ZTA-MgO samples which were the raw powder, the sintered samples and also the samples after machining process. Results shows that the m-ZrO2 reduced to 0% when sintering process take place and reappear at 12% when the machining process take place proving the occurrence of transformation toughening during the machining process. The consequence of this condition is the hardness of the samples increased by 22% while the fracture toughness decreased by 21.1%.
The Effect of Different Silica Compositions to the Properties of Silica Foam Fabricated Using Slurry Method
Authors: Baharom Syazwani , Ahmad Sufizar , Mohd Ramli Muhamad Izranuddin
Published: March 2017

Silica foams with 50% – 70% porosity have been developed by mixing silica powder, polyethylene glycol (PEG) and carboxymethyl cellulose (CMC) into distilled water to make slurry. Polyurethane foam (PU) as the template is immersed into the slurry with 45 wt.%, 50 wt.% and 55 wt.%. of silica composition and finally sintered at 1100°C, 1200°C, 1300°C and 1400°C. Several tests which are morphological analysis, porosity and density test, and compressive strength test are compulsory to determine the physical and mechanical of the silica foam. The morphology of the foam has been observed using Scanning Electron Microscopy (SEM) and the result of pore size distribution is in the range of 255.91 μm to 489.14 μm. The porosity and density obtained from the porosity and density test was 50%-73.66% and 0.5499 g/cm³ up to 0.9757 g/cm³, respectively. Meanwhile, the compressive strength of sintered silica foam obtained is 0.01471 N/mm² up to 0.1467 N/mm².
Rietveld Refinement Strategy of CaTa4-xNbxO11 Solid Solutions Using GSAS-EXPGUI Software Package
Authors: Ros Fadhlina Che
Published: March 2017

Crystal structures of CaTa4-xNbxO11 solid solutions (x = 0, 1 and 2) in space group P6322, have been refined by application of the Rietveld method X-ray powder diffraction profile. Refinement were carried out using GSAS software and EXPGUI interface. The unit cell parameters and cell volume increase with increasing Nb content; all samples contain random distribution of Ta/Nb. Strategy and procedures for CaTa4-xNbxO11 solid solutions refinement are reported. The structure consists of layers of tantalum-oxygen bipyramids sharing-edges alternating with layers of octahedra.
Microstructure and Mechanical Properties of Cement Mortar Incorporate with Coated Expanded Polystyrene Beads
Authors: Johari Izwan B. , Hamid Amri , Kasim Shah Rizal , Ahmad Zainal Arifin
Published: March 2017

Abstract. Coated Expanded polystyrene (CEPS) mortar is a new lightweight building material that demonstrate a good mechanical properties by improving it interfacial bonding properties. By using the field emission scanning electron microscope (FESEM) with high resolution imaging, the mortar morphology at different ages (7, 14 and 28 days) can be observed. The results shows that coated EPS bead provide a good bonding as there is no gap in the interfacial surface at 28 days.
Comparative Study of Chemical and Mechanical Treatment Effects on Bacterial Cellulose from Nata de Coco
Authors: Ahmad Rusdi Rusaini Athirah , Abidin Zul Hazrin Zainal , Tajuddin Hairul Anuar , Abdul Aziz Fauziah , Abdul Halim Norhana
Published: March 2017

In this work, bacterial cellulose was obtained from nata de coco. Initially, the samples were subjected to three types of different condition which were raw, chemical treatment and mechanical treatment. Bacterial cellulose was characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffractometer (XRD) and Field Emission Scanning Electron Microscopy (FESEM). Bacterial cellulose met the specifications of pure cellulose either using chemical or mechanical treatments proved by IR spectra reading. XRD results indicated that the crystallinity of chemical treatment bacterial cellulose is higher than the mechanical treatment bacterial cellulose which was 68.6% and 59.5% respectively. The FESEM analysis shows that the size of the bacterial cellulose that obtained from chemical treatment is smaller than mechanical treatments which were 19.42μm and 50.35μm.
Effect of Dispersant Addition on Properties of Ceramic Pieces from Kampung Dengir, Besut, Terengganu, Malaysia
Authors: Ismail Adnen Noor Asliza , JOULME MORAD Nur Atiqah Azwa , Abdullah Mohd Aidil Adhha , Muhamad Nor Mohd Al Amin
Published: March 2017

The abundancy of ball clay can be transform into more useful form. This study was conducted to investigate the effect of different amount of dispersant on ceramic system. Ball clay from Kampung Dengir, Besut, Terengganu was used as starting powder while sodium silicate was used as dispersant to produce good flow ability, minimum viscosity and controllable ceramic slurry. Ceramic slurry was prepared by adding additives such as binder, flux, filler and dispersant, casted onto POP mould to obtain ceramic body. Ceramic then cut into test pieces (8cm x 2cm) and mixed for 2 h and aged for 2 days before dried at 70 °C overnight and sintered at temperature of 800-1200 °C in furnace for 2 h with heating rate 5 °C/min. Slurries also tested for rheological properties using rheometer (brand Thermo Haake). Viscosity and shear stress were measured to investigate the rhoelogical behaviour of slip with different amount of dispersant (0.03 mL to 0.06 mL/200 mL of sample). Characterization of raw samples has been done using X-ray diffractometer (XRD) showing the presence of kaolinite and quartz. Effect of dispersant on rheological behavior, rate of shrinkage, water absorption, porosity and density were investigated It was found that increase in amount of dispersant added exhibit the best rheological behavior, and 0.05 mL dispersant was the optimum amount in term of rate of shrinkage, water absorption, porosity and density. As a conclusion, 0.05 mL was the optimum dispersant which gives best rheological behavior and almost fault-free ceramic bodies
XRD and Photoluminescence Properties of CaSO4:Dy Phosphor Synthesized by New Co-Precipitation Method
Authors: Kamarudin Nadira , Wan Abdullah Wan Saffiey , Hamid Muhammad Azmi Abdul
Published: March 2017

This paper presents the luminescence properties of dysprosium (Dy) doped calcium sulfate (CaSO4) phosphor material produced by co-precipitation technique with 0.1 - 0.5 mol% concentration of dopant. The crystallinity of the produced powder was studied using x-ray powder diffraction (XRD). The XRD spectrum shows high purity anhydrite CaSO4 phosphor material produced. The average crystallite size of 74 nm with orthorhombic crystal system was obtained. The luminescence behavior of produced CaSO4: Dy was studied using a photoluminescence (PL) spectrometer. The excitation and emission spectrum peaks associated with defects and vacancies of the phosphor material at claimed crystalline phase. The mixed peaks of excitation and emission that corresponds to micro and nano sized particle was shown for the produced powders. These properties show that the produced powders have wide range of luminescence detection with many electron traps ready for thermoluminescence (TL) information storage.
Growth of ZnO on Flexible Substrate via Sol-Gel Hot Water Treatment
Authors: Kamardin Ili Liyana Khairunnisa , Ainun Rahmahwati Ainuddin
Published: March 2017

Sol-gel precursor has been prepared by using zinc acetate (ZnAC) as starting material dissolved in isopropanol (IPA), diethanolamine (DEA) and distilled water (H2O) were added to produce a homogeneous and stable solution. The sol-gel precursor was deposited on ITO/PET substrate by spin-coat route. Oxidation process was held in deionized water at 90 °C for a specific time. The (100) and (101) ZnO planes were formed as the preferred orientation. RMS values of ZnO samples found to be 280 nm, 272 nm and 241 nm for 8 h, 12 h and 16 h, respectively by hot water treatment (HWT). ZnO nanorods-hourglass-like, nanosheet-leafs-like and nanorods-oval-like were obtained with different HWT time.
Effect of Noble Metal Silver on the Reduction Behaviour of Molybdenum Oxide Using Carbon Monoxide
Authors: Samsuri Alinda , Salleh Fairous , Tengku Saharuddin Tengku Shafazila , Othaman Rizafizah , Mohamed Hisham Mohamed Wahab , Yarmo Mohd Ambar
Published: March 2017

The reduction behavior of silver doped molybdenum trioxide (Ag/MoO3) and undoped MoO3 by using carbon monoxide, CO were investigated by using temperature programmed reduction (TPR). The reduced phases were characterized by X-ray diffraction (XRD). In the carbon monoxide atmosphere, the XRD results indicated that the reduction of Ag/MoO3 and undoped MoO3 to MoO2 phase proceed in two steps (MoO3 → Mo4O11 → MoO2) with Mo4O11 present as an intermediate state. A complete reduction to metallic molybdenum for both samples cannot occurred since in an excess CO atmosphere, MoO2 is promoted to form carbides rather than reduce to metallic molybdenum. Nevertheless, addition of silver to modified MoO3 shows the better reducibility compared to MoO3 alone by lower the reducing temperature of MoO3. TPR results show that the reduction peak of Ag/MoO3 is slightly shifts to lower temperature as compared with the undoped MoO3. The interaction between silver and molybdenum ions leads to this slightly decrease of the reduction temperature of silver doped MoO3. It can be seen that doping with silver has a remarkable influence in the reduction process of the MoO3 catalyst.
Sago Pith Waste Ash as an Addition to Fly Ash-Based Geopolymer Mortar
Authors: Mohamed Rashid Mohamad Rohaidzat , Seli Hazman , Megat Johari Megat Azmi , Ahmad Zainal Arifin
Published: March 2017

This paper presents the effects of Sago pith waste ash (SPWA) as a replacement material in fly ash (FA) based geopolymer mortar (from 0 to 40%), from the aspect of mineral composition and compressive strength. The geopolymers were prepared and synthesized using a combination of sodium hydroxide (NaOH) and sodium silicate (Na2SiO3) as activator whilst SPWA and FA (by percentage) as high silica-alumina resources. The compressive strength of geopolymer mortar utilizing SPWA/FA was investigated together with the quantitative chemical characteristic via X-ray fluorescence (XRF) and the X-ray diffractometer (XRD). It was observed that by substituting SPWA to partially replacing FA in geopolymer mortar affects the compressive strength as well as the chemical compositions of the mortars. SPWA can increase 5% of the compressive strength (at 10 wt% SPWA, GSPWA10) compared to the FA geopolymer based sample (control). Furthermore, the increment in the percentages of SPWA increased the silica/alumina (SiO2/Al2O3) ratio and that resulted in reduction of compressive strength for other geopolymer mortar samples.
Effects of Milling Speed and Calcination Temperature on the Phase Stability of Ba0.5Sr0.5Co0.8Fe3-δ
Authors: Ng Kei Hoa , Rahman Hamimah Abdul , Afandi Shaibool
Published: March 2017

The phase instability of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) is widely reported in atmospheres containing carbon dioxide, which affects the long term electrochemical performance. The aim of this study is to investigate the phase stability of BSCF under the influence of milling and calcination temperature. Commercial BSCF powder was milled at 200 and 500 rpm and subsequently calcined at 750, 800 and 900 °C. The BSCF samples were characterized by using X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM). Secondary phases that were triggered after milling, however reduced with the increase of calcination temperature up to 800 °C. It was also found that the reduction of crystallite size and particle size at increased calcination temperature might be affected by the removal of these secondary carbonate phases. Moreover, the removal of carbonate was clearly evidenced in FTIR spectra by the reduction of carbonate signal intensities. In brief, a minimum calcination temperature of 900 °C was suggested for successful carbonate removal and recovery of single BSCF phase.
Effect of Metals Compatibility on Fluorine-Doped Tin Oxide Catalyst for Glycerol Conversion to 1,2-Propanediol
Authors: Samad Wan Zurina , Wan Isahak Wan Nor Roslam , Hamzah Noraini , Yarmo Mohd Ambar , Yusop Muhammad Rahimi
Published: March 2017

The effect of metals on support material fluorine-doped tin oxide (FTO), were studied. A series of metals such as ruthenium (Ru), osmium (Os), palladium (Pd), and copper (Cu) on FTO support were prepared by a simple wet mixture method, and attempted as a heterogeneous catalyst to enhance the hydrogenolysis of glycerol converted to 1,2-propanediol (1,2-PDO). The physicochemical properties of the catalysts were characterized by XRD, XPS, BET, FESEM, TEM, TPR, and TPD techniques. In particular, the catalyst of Ru-FTO was recorded as a good catalyst with an optimum glycerol conversion of 100% and 1,2-PDO selectivity of 94% respectively. It was suggesting that the acid an basic properties of the catalyst could achieved the C-O and C-H bond dissociation by formation of different intermediates of acetol and acetaldehyde to become 1,2-PDO. Despite that, some reaction parameters were evaluated and optimized reaction condition were established
Effect of Pressure on the CO2 Absorption into Ladle Furnace Slag
Authors: Selamat Siti Norhana , Muhd Nor Nik Hisyamudin , Mohamad Fariza , Rashid Muhammad Hanif Abd , Abd Rahim Abd Khalil , Ismail Al Emran , Zamzuri Mohd Zain Mohamad , Yokoyama Seiji
Published: March 2017

Carbon dioxide (CO2) is one of the greenhouse gases (GHG) and the concentration is much more higher than other GHG gases. Based on the prediction, about 285.73 million tonnes will be emitted in year 2020 with the main contributors are from power generation, manufacturing industries, transportation and residential sector [1]. This research focused to study the effect of pressure on the CO2 absorption with Malaysia steel slag using mechanical stirrer. The steel slag is collected from one of steel industry located in Pasir Gudang Johor Malaysia and characterized to investigated the chemical composition. The reaction between CO2 absorption and the slag was investigated by using different speed and weight. The initial pressure was set at 101.3 kPa which equivalent with 1 atmospheric pressure. The behavior of the reaction between CO2, and ground sample was investigated by measuring the change in the CO2 pressure inside the mechanical stirrer. It was found that the CO2 pressure decreased as soon as the stirrer started and continuously decreased till bout 270 t/min stirring time.
Influence of B2O3 on Phosphate Ion Released from SiO2-B2O3-P2O5-Na2CO3  Glass in Synthetic Seawater
Authors: Yusof Nurul Fariha , Ku Bulat Ku Halim , Badarulzaman Nur Azam , Muhamad Nor Mohd Al Amin
Published: March 2017

Phosphates have been receiving important attention in various fields and one of the fundamental sources of nutrients required to be used as source of nutrients for plankton growth. The objective of this study is to determine the effect of boron oxide on phosphate ion released from the system SiO2-B2O3-P2O5-Na2CO3 glasses. The compositions of this glass system [wt%: (55-x)% SiO2- (15+x)% B2O3- 5% P2O5- 25% Na2CO3] where 15≤x≤40 % have been prepared with the different amount of B2O3 (30-55wt%) and P2O5 with Na2CO3 were fixed. The glass has been prepared by melting in the alumina crucible within 2 h of soaking time at 1300 °C in the furnace and cooled to room temperature. The obtained glass samples were crushed and sieved at mean size of 2 mm – 4 mm. The dissolution studies were determined through the immersion of the glass samples in 50 mL synthetic seawater for 30 days under static condition. The results were obtained and analyzed using Discrete Auto Analyzer. Fourier Transform Infrared (FTIR) with Attenuated Total Reflectance (ATR) method was used to determine the functional group sample of glasses and the glass phase was characterized by X-Ray diffraction (XRD) techniques. Dissolution studies showed that, the concentration of phosphate ion released decreased with increasing B2O3 content whilst, increased with immersion time. The obtained experimental data indicated that, the optimum concentration of phosphate ion (10.27 ppm) was achieved at 35 wt% of B2O3 at week three.
XRD and CO2 Adsorption Studies of Modified Silica Gel with Octadecylamine
Authors: Abu Tahari Maratun Najiha , Hakim Azizul , Marliza Tengku Sharifah , Mohd Nurul Hanisah , Yarmo Mohd Ambar
Published: March 2017

Porous surface of silica gel (SG) have been modified with long and straight chain fatty amine compounds (octadecylamine, ODA) via wet impregnation process. SG was undergo heat treatment with various temperature which are 100, 200, 400 and 600 °C before continuing with impregnation process. Characterization by XRD of the treated samples were showed no significant different in their diffractograms. The best temperature for heat treatment was 600 °C and it was referred to the ability of the SG600 type adsorbents in adsorbing CO2 resulted from adsorption desorption isotherm of CO2. The 5 and 35 wt. % of ODA supported on the SG (ODA/SG600) was further characterized using XRD analysis which displayed the increasing intensity of crystalline ODA with higher percent amine loaded and shifting of the several crystalline peak of ODA verified the interaction of SG600-ODA. These further strengthen the prevailing dispersion of ODA on the surface of SG600.
Fabrication of Lanthanum and Strontium Doped PZT Ceramics Using Solid State Reaction Method
Authors: Tuan Ab Rashid Tuan Nur Izzah , Ahmad Zainal Arifin , Mohamed Julie Juliewatty , Mohamad Hasmaliza
Published: March 2017

Lead Zirconate Titanate (PZT) undoped and doped was prepared by using solid state reaction method. In this paper, PZT is doped with another elements with is La3+ and Sr2+ in order to enhance the properties of PZT. The samples were prepared via high planetary mill which is can skip the calcination process that can cause of PbO loss during firing. With the help of x-ray diffraction (XRD) and scanning electron microscopy (SEM), the formation of perovskite structure into newly modified ceramics was investigated and the grain growth of pure PZT and doped PZT were also investigated which is can enhance their properties which may be suitable for possible device applications.
Dielectric Properties of Al2O3/CaCu3Ti4O12 Composite at High Frequency Range
Authors: Afindi Zaman Rosyaini , bin Abu Mohamad Johari , Ab Rahman Mohd Fariz , Wan Ali Wan Fahmin Faiz , Mohamed Julie Juliewatty , Ain Mohd Fadzil , Ahmad Zainal Arifin
Published: March 2017

The dielectric properties of CCTO with addition Al2O3 prepared via solid state reaction investigated and reported at 1 GHz. With addition Al2O3 from 20 wt% to 80 wt%, secondary phase starts appear in XRD analysis such as copper dialuminium oxide (CuAl2O4), calcium titanate (CaTiO3) and titanium oxide (TiO2). These secondary phases show great influence on morphology and grain size of Al2O3/ CCTO composites. Hence, the addition of only 20 wt% Al2O3, the dielectric constant of CCTO reduce almost 50% and tangent loss is in between 0.0028 to 0.0630 which is very low and this characterization is suitable to use in electronic application in high frequency range.
Investigation of YIG’s Active Site Using Density Functional Theory
Authors: Wan Ali Wan Fahmin Faiz , Kamarudin Maslinda , Abdullah Norazharuddin Shah , Ahmad Zainal Arifin
Published: March 2017

Numerous materials characteristic including yttrium iron garnet (YIG) are directly dependent on its crystal structure; phase diversity. However, only a few examination of energy and its mechanism at atomistic scales was reported. In this article, a density functional theory (DFT) based calculations have been carried out to study electronic properties of cubic Y3Fe5O12 (YIG) at its known active sites; (0,0,4), (2,2,4) and (2,2,4). The density of state (DOS) these sites were presented at-19 eV to-14 eV for lower valance band and-6 eV to 0 for upper valance band. Both (0,0,4) and (0,2,4) planes shows highest possibility of cation substitution since the energy substitution are the lowest (~40 KeV). (2,2,4) plane composed of O-O interaction in which would contribute to the oxygen vacancy.
Apparent Diffusion Coefficient Measurement in Mediastinal Lymphadenopathies: Differentiation between Benign and Malignant Lesions
Authors: Ustabasioglu Fethi Emre , Samanci Cesur , Alis Deniz , Samanci Nilay Sengul , Kula Osman , Olgun Deniz Cebi
Published: March 2017

Objectives:

We aimed to prospectively assess the diagnostic value of apparent diffusion coefficient (ADC) measurement in the differentiation of benign and malignant mediastinal lymphadenopathies.

Materials and Methods:

The study included 63 consecutive patients (28 women, 35 men; mean age 59.3 years) with 125 mediastinal lymphadenopathies. Echoplanar diffusion-weighted magnetic resonance imaging of the mediastinum was performed with b-factors of 0 and 600 mm2/s before mediastinoscopy and mediastinotomy, and ADC values were measured. The ADC values were compared with the histological results, and statistical analysis was done.P< 0.05 was considered statistically significant.

Results:

The mean ADC value of malignant mediastinal lymphadenopathy (1.030 ± 0.245 × 10−3mm2/s) was significantly lower (P< 0.05) when compared to benign lymphadenopathies (1.571 ± 0.559 × 10−3mm2/s). For differentiating malignant from benign mediastinal lymphadenopathy, the best result was obtained when an ADC value of 1.334 × 10−3mm2/s was used as a threshold value; area under the curve 0.848, accuracy 78.4%, sensitivity 66%, specificity of 86%, positive predictive value 76.7%, and negative predictive value of 79.2%. Interobserver agreement was excellent for ADC measurements.

Conclusions:

ADC measurements could be considered an important supportive method in differentiating benign from malignant mediastinal lymphadenopathies.
Quality of Case Management for Pneumonia and Diarrhea Among Children Seen at Health Facilities in Southern Malawi
Authors: Kobayashi Miwako , Mwandama Dyson , Nsona Humphreys , Namuyinga Ruth J. , Shah Monica P. , Bauleni Andrew , Eng Jodi Vanden , Rowe Alexander K. , Mathanga Don P. , Steinhardt Laura C.
Published: March 2017

Pneumonia and diarrhea are leading causes of child deaths in Malawi. Guidelines to manage childhood illnesses in resource-poor settings exist, but studies have reported low health-care worker (HCW) adherence to guidelines. We conducted a health facility survey from January to March 2015 to assess HCW management of pneumonia and diarrhea in children < 5 years of age in southern Malawi, and to determine factors associated with case management quality. Descriptive statistics and multivariable logistic regression models examined patient, HCW, and health facility factors associated with recommended pneumonia and diarrhea management, using Malawi's national guidelines as the gold standard. Of 694 surveyed children 2–59 months of age at 95 health facilities, 132 (19.0%) met survey criteria for pneumonia; HCWs gave recommended antibiotic treatment to 90 (68.2%). Of 723 children < 5 years of age, 222 (30.7%) had uncomplicated diarrhea; HCWs provided recommended treatment to 94 (42.3%). In multivariable analyses, caregivers' spontaneous report of children's symptoms was associated with recommended treatment of both pneumonia (odds ratio [OR]: 2.8, 95% confidence interval [CI]: 1.2–6.8, P = 0.023) and diarrhea (OR: 24.2, 95% CI: 6.0–97.0, P < 0001). Malaria diagnosis was negatively associated with recommended treatment (OR for pneumonia: 0.5, 95% CI: 0.2–1.0, P = 0.046; OR for diarrhea: 0.3, 95% CI: 0.1–0.6, P = 0.003). To improve quality of care, children should be assessed systematically, even when malaria is suspected. Renewed efforts to invigorate such a systematic approach, including HCW training, regular follow-up supervision, and monitoring HCW performance, are needed in Malawi.
Nomenclature-Forwarder
Authors:   MTC4, Forestry and Logging Equipment
Published: March 2017

This SAE Recommended Practice identifies major components and parts peculiar to forwarders. Illustrations used here are not intended to include all existing machines or to be exactly descriptive of any particular machine. They have been provided to illustrate the principles to be used in applying this document. the purpose of this document is to provide standardization of terms for major components of forwarders.
Bias caused by water adsorption in hourly PM measurements
Authors: Kiss Gyula , Imre Kornélia , Molnár Ágnes , Gelencsér András
Published: March 2017

Abstract. Beta attenuation monitors are used worldwide to monitor PM concentration with high temporal resolution. Hourly PM10 and PM2.5 dry mass concentrations are publicly available with the tacit assumption that water is effectively removed prior to the measurement. However, as both the filter material of the monitor and the aerosol particles are capable of retaining significant amount of water even at low relative humidities, the basic assumption may not be valid resulting in significant bias in reported PM10 and PM2.5 concentrations. Here we show that in PM10 measurement particle-free air can produce apparent hourly average PM concentrations in the range of −13–+21 µg m−3 under conditions of fluctuating relative humidity. Positive and negative apparent readings are observed with increasing and decreasing relative humidities, respectively. Similar phenomena have been observed when the instrument filter was previously loaded with atmospheric aerosol. As a result, the potential measurement biases in hourly readings arising from the interaction with water may be in the range of −53 %–+69 %.
Explicit and parametrised representation of under ice shelf seas in a
z* coordinate ocean model
Authors: Mathiot Pierre , Jenkins Adrian , Harris Christopher , Madec Gurvan
Published: March 2017

Abstract. Ice shelf/ocean interactions are a major source of fresh water on the Antarctic continental shelf and have a strong impact on ocean properties, ocean circulation and sea ice. However, climate models based on the ocean/sea ice model NEMO currently do not include these interactions in any detail. The capability of explicitly simulating the circulation beneath ice shelves is introduced in the non-linear free surface model NEMO. Its implementation into the NEMO framework and its assessment in an idealised and realistic circum-Antarctic configuration is described in this study. Compared with the current prescription of ice shelf melting (i.e. at the surface) inclusion of open sub-ice-shelf leads to a decrease sea ice thickness along the coast, a weakening of the ocean stratification on the shelf, a decrease in salinity of HSSW on the Ross and Weddell Sea shelves and an increase in the strength of the gyres that circulate within the over-deepened basins on the West Antarctic continental shelf. Mimicking the under ice shelf seas overturning circulation by introducing the meltwater over the depth range of the ice shelf base, rather than at the surface is also tested. It yields similar improvements in the simulated ocean properties and circulation over the Antarctic continental shelf than the explicit ice shelf cavity representation. With the ice shelf cavities opened, the widely-used “3 equations” ice shelf melting formulation enables an interactive computation of melting that has been assessed. Comparison with observational estimates of ice shelf melting indicates realistic results for most ice shelves. However, melting rates for Amery, Getz and George VI ice shelves are considerably overestimated.
Spatio-temporal modelling of lightning climatologies for complex terrain
Authors: Simon Thorsten , Umlauf Nikolaus , Zeileis Achim , Mayr Georg J. , Schulz Wolfgang , Diendorfer Gerhard
Published: March 2017

Abstract. This study develops methods for estimating lightning climatologies on the day−1 km−2 scale for regions with complex terrain and applies them to summertime observations (2010–2015) of the lightning location system ALDIS in the Austrian state of Carinthia in the Eastern Alps. Generalized additive models (GAMs) are used to model both the probability of occurrence and the intensity of lightning. Additive effects are set up for altitude, day of the year (season) and geographical location (longitude/latitude). The performance of the models is verified by 6-fold cross-validation. The altitude effect of the occurrence model suggests higher probabilities of lightning for locations on higher elevations. The seasonal effect peaks in mid-July. The spatial effect models several local features, but there is a pronounced minimum in the north-west and a clear maximum in the eastern part of Carinthia. The estimated effects of the intensity model reveal similar features, though they are not equal. The main difference is that the spatial effect varies more strongly than the analogous effect of the occurrence model. A major asset of the introduced method is that the resulting climatological information varies smoothly over space, time and altitude. Thus, the climatology is capable of serving as a useful tool in quantitative applications, i.e. risk assessment and weather prediction.
Insights on the role of accurate state estimation in coupled model parameter estimation by a conceptual climate model study
Authors: Yu Xiaolin , Zhang Shaoqing , Lin Xiaopei , Li Mingkui
Published: March 2017

Abstract. The uncertainties in values of coupled model parameters are an important source of model bias that causes model climate drift. The values can be calibrated by a parameter estimation procedure that projects observational information onto model parameters. The signal-to-noise ratio of error covariance between the model state and the parameter being estimated directly determines whether the parameter estimation succeeds or not. With a conceptual climate model that couples the stochastic atmosphere and slow-varying ocean, this study examines the sensitivity of state–parameter covariance on the accuracy of estimated model states in different model components of a coupled system. Due to the interaction of multiple timescales, the fast-varying atmosphere with a chaotic nature is the major source of the inaccuracy of estimated state–parameter covariance. Thus, enhancing the estimation accuracy of atmospheric states is very important for the success of coupled model parameter estimation, especially for the parameters in the air–sea interaction processes. The impact of chaotic-to-periodic ratio in state variability on parameter estimation is also discussed. This simple model study provides a guideline when real observations are used to optimize model parameters in a coupled general circulation model for improving climate analysis and predictions.
Wind Field Reconstruction from Nacelle-Mounted Lidars Short
Range Measurements
Authors: Borraccino Antoine , Schlipf David , Haizmann Florian , Wagner Rozenn
Published: March 2017

Abstract. Profiling nacelle lidars probe the wind at several heights and several distances upstream the rotor. Yet, it is still unclear how to condense the lidar raw measurements into useful wind field characteristics such as speed, direction, vertical and longitudinal gradients (wind shear). In this paper, we demonstrate an innovative method to estimate wind field characteristics using nacelle lidar measurements taken within the induction zone. Model-fitting wind field reconstruction techniques are applied to nacelle lidar measurements taken at multiple distances close to the rotor, where a wind model is combined with a simple induction model. The method allows robust determination of free stream wind characteristics. The method was applied to experimental data obtained with two different types of nacelle lidar (5-beam Demonstrator and ZephIR Dual-Mode). The reconstructed wind speed was within 0.5 % of the wind speed measured with a mast top-mounted cup anemometer at 2.5 rotor diameters upstream of the turbine. The technique described in this paper overcomes measurement range limitations of the currently available nacelle lidar technology.
Trailed vorticity modeling for aeroelastic wind turbine simulations
in stand still
Authors: Pirrung Georg R. , Madsen Helge Aa. , Schreck Scott
Published: March 2017

Abstract. Current fast aeroelastic wind turbine codes suitable for certification lack an induction model for standstill conditions. A trailed vorticity model previously used as addition to a blade element momentum theory based aerodynamic model in normal operation has been extended to allow computing the induced velocities in standstill. The model is validated against analytical results for an elliptical wing in constant inflow and against stand still measurements from the NREL/NASA Phase VI unsteady experiment. The extended model obtains good results in case of the elliptical wing, but underpredicts the steady loading for the Phase VI blade in attached flow. The prediction of the dynamic force coefficient loops from the Phase VI experiment is improved by the trailed vorticity modeling in both attached flow and stall in most cases. The exception is the tangential force coefficient in stall, where the codes and measurements deviate and no clear improvement is visible. This article also contains aeroelastic simulations of the DTU 10 MW reference turbine in stand still at turbulent inflow with a fixed and idling rotor. The influence of the trailed vorticity modeling on the extreme flapwise blade root bending moment is found to be small.
Chaucer's Friar John and the Place of the Cat
Authors: Hardwick Paul
Published: March 2017

The cat holds a distinctive space in the human environment, being both domesticated and in full possession of its wild nature. This article considers representations of cats in both written sources—including poetry, natural history, the Bestiary, and moral texts—and the visual arts, in order to demonstrate that the cat may be simultaneously read as naturalistic and symbolic, representing at the extreme both a much-loved pet and the threat of damnation. This reading is applied to Chaucer's Summoner's Tale in order to argue that the cat displaced by Friar John offers a pointed criticism of the hypocrisy of the mendicant orders.
Thematic Analysis of Eight Canadian Federal Broadband Programs from 1994 to 2016
Authors: McNally Michael B. , Rathi Dinesh , Evaniew Jennifer , Wu Yang
Published: March 2017

This article provides a historical and thematic analysis of eight Canadian federal government broadband programs. Examination of program documents led to the identification of several themes. These themes formed the basis for understanding and revealing trends in federal programs over time. Analysis of the trends, informed by Dwayne Winseck's approach to political economy, reveals that in general federal broadband programs have not fully realized the democratic potentialities of broadband. Furthermore, there is partial evidence on the degree to which programs have facilitated private gains for telecom firms in some areas (e.g., program expenditures, technology, and market forces).
POTENCIALIDADES E LIMITAÇÕES AGRÍCOLAS DE SOLOS EM ASSENTAMENTO DE REFORMA AGRÁRIA NO MUNICÍPIO DE CHAPADINHA-MA
Authors: De Azevedo James Ribeiro , Bueno Célia Regina Paes
Published: March 2017

RESUMO - A classificação dos solos e a caracterização de suas propriedades químicas e físicas são importantes para o desenvolvimento de uma agricultura sustentável. Objetivou-se neste trabalho caracterizar, classificar e avaliar as potencialidades e as restrições agrícolas dos solos do assentamento de reforma agrária Malhada do Meio, localizado no município de Chapadinha-MA. Foram abertos quatro perfis em pontos distintos da paisagem. Amostras foram coletadas para a realização das análises de caracterização químicas e granulométrica. Os solos estudados foram classificados como Plintossolo Pétrico Concrecionário êndico latossólico, Plintossolo Argilúvico Distrófico abrúptico gleissólico, Neossolo Flúvico e Gleissolo Háplico Tb Distrófico cambissólico. As limitações agrícolas entre os solos estudados podem restringir a produtividade das culturas agrícolas e afetar a qualidade de vida das famílias.