bluuebunny/crossref_metadata_2025 huggingface dataset:
Hardness of water analysis at the Grotowice intake situated near Opole
Authors: Klosok-Bazan Iwona , Filipowski Mateusz , Stojak Michal
Published: October 2018

The determination of raw water hardness subsequently treated and used for domestic water supplies is a useful parameter to characterize the present total dissolved solids as well as for calculation dosages for lime-soda softening application. Because water hardness concentrations have not been proven to be health related, the final achieved level is mainly an economic function. To identify existing trends, the changes in water hardness in Grotowice intake for the years 1999-2017 have been analysed. The obtained results indicate clearly that the water hardness in three wells shows a slight downward trend, but on the other hand, one trend is rising in another direction.
Removal of phosphorus compounds from water experience from technological research
Authors: Pruss Alina , Pruss Paweł
Published: October 2018

The aim of the technological research was to determine the technology which would enable reduction of the concentration of phosphorus compounds in water to the level of 0.02 mg PTot/dm3. The raw water during the study period was characterized by a pH of 6.66 to 7.62 and a variable concentration of phosphorus compounds ranging from 0.150 to 0.366 mg PTot/dm3, including phosphates in the range of 0.039 to 0.089 mg PO4/dm3. The concentration of chlorides was below 10 mg Cl/dm3and sulphates did not exceed 14 mg SO4/dm3. Treated water was intended for soil application therefore its quality after treatment could not exceed the limit values set forth in the regulations in force during the study period. The conducted research has shown that the use of the coagulation process based on the ferric coagulant PIX 112 combined with rapid filtration ensures the required quality of the treated water, among other things, through lowering the concentration of PTot to 0.02 mg/dm3.
Hydraulic characteristic of selected installation valves installed on various pipes materials
Authors: Poręba Krystyna , Kowalczyk Weronika , Widomski Marcin K. , Musz-Pomorska Anna
Published: October 2018

Presented studies covered determination of minor pressure losses and values of minor loss coefficients for two selected installation valves: water control globe valve and angle valve, both DN 15. The tested valves were installed on three pipes, including PP 20x3.4 mm, PEX-Al-PEX 16x2.0 mm and Cu 15x1.0 mm. In order to reflect the real operating conditions of the angle valve, the elastic PVC pipe was used. Our researches were performed on the laboratory installation, for the variable flow rate. The obtained results of laboratory studies showed the clear dependence between minor pressure loss and minor loss coefficients of studied valves, and water flow rate (Reynolds number), degree of valves’ closure and, in some cases, manner of valves installation and material of pipes. The greatest values of minor pressure loss coefficients, of mean values relevantly statistically grater, were determined for the tested valves installed on the PEX-Al-PEX pipeline.
Disinfection by-products monitoring in water of selected outdoor swimming pools in Opole Voivodship
Authors: Klosok-Bazan Iwona , Bożym Marta , Wzorek Małgorzata
Published: October 2018

The aim of this study was to determine the level of disinfection by-products in selected outdoor swimming pool in the Opole Voivodship. The authors paid special attention to the determination of the concentration of trihalomethanes (THMs), which are formed during disinfection in water. Five outdoor swimming pools were selected in five different cities located in Opole Region. The level of trihalomethane (THM) concentrations in the analyzed waters was found to be in the wide range from 15 to more than 550 µg/L. The dominant compound of THMs was chloroform because of chlorine application in the disinfection method.
Destabilization of the hard coal microstructure by a weak electric field
Authors: Molchanov Oleksandr , Rudakov Dmytro , Soboliev Valerii , Kamchatnyi Oleksii
Published: October 2018

This study aims to analyse physical and chemical changes in hard coal samples under the influence of low-intensity electric fields in comparison to the fragments of ejected coal, as well as the coal samples selected from the zones of high and low outburst hazard. We used physical methods including X-raying, electron paramagnetic resonance, thermogravimetric analysis, differential scanning calorimetry, laser diffraction analysis of particle sizes, IR-spectrometry, nuclear magnetic resonance, and Raman spectroscopy. It has been shown that destruction of coal organic matter (COM) can be caused not only by mechanical impacts or thermal influences but also weak electric fields. Scientific novelty consists in the fact that for the first time we established the identity of the COM destruction mechanism of mechanical-chemical activation and weak electric fields influencing on the previously destabilized coal microstructure. The destruction mechanism is based on thermal field regularities in both cases. The results obtained are of practical significance for the technologies of coal conversion to other products. The research results can be useful in the development of methods for reducing outburst hazard in coal mines.
Simulation of deposit parameters in underground development mining
Authors: Golik Vladimir , Razorenov Yuriy , Morkun Volodymyr , Morkun Nataliia
Published: October 2018

The article is aimed at improving development mining to prepare an ore body for stoping by access ramps to provide comfortable conditions and high technical and economic indices in underground mining. Efficient parameters of underground mining are chosen in the course of simulating data on the mining theory and practice considering ore losses and dilution on the basis of critical analysis of uranium mining enterprises’ activities. The research provides data on geological and engineering zoning of an ore deposit and physical-mechanical properties of ore bearing rocks. The advanced experience is systemized and there is provided system analysis of modern development mining schemes with access ramps (ring, spiral, one-way inclined, central inclined and across the strike). The research recommends schemes of development mining and substantiates their advantages. There are quantitative indices of physical simulation of development variants as to drawn ore quality according to criteria of soil location in ore draw points. The scientific novelty implies developing the criterion of optimality and ranking variants of development mining according to technical-economic and geomechanical indices considering some technological factors as well as the number of stopes operating simultaneously on the level. The study consists in increasing authenticity of development projects through applying complex schemes of access ramps according to the complex criterion of increasing mining depths, equipment application, ventilation and underground mine capacity.
QoS Analysis on OSPFv3 And RIPng Using GRE Tunneling on IPv6 Integrated Ipv4 Network
Authors: Warman Indra , Franozal Alex
Published: October 2018

Every year, the availability of public IPv4 addresses is running low. However, the IETF (Internet Engineering Task Force) has set a new addressing standard called IPv6 (Internet Protocol version 6). IPv6 implementations can not be immediately performed on all end-to-end lines, a transition phase is required, one of which is the GRE tunneling method. IPv6 has some differences with IPv4, then in line with the presence of IPv6 will required the protocol that compatible with IPv6, among which is the routing protocol. Some dynamic routing protocols are created to support and can run on IPv6 such as RIPng and OSPFv3. Aim of this study is examines OSPFv3 routing protocols and RIPng routing protocols in terms of Quality of Service (QoS). The test is done by using seven routers with three scenarios in each routing protocol, ie scenario with best path active condition, when the network changes in other words best path down, and the scenario with best path condition has changed and the network has returned to normal. Testing is done by testing QoS parameters (delay, packet loss, and throughput) when the client computer downloads files with the .iso extension from the server. Downloaded files have different sizes, from 100 Mega Byte to 1 Giga Byte. From the results obtained that OSPFv3 provides better QoS (delay, packet loss, and throughput) than RIPng on integrated IPv6 network using GRE tunnel and can be a reference when going to transition from IPv4 to IPv6 using GRE Tunnel.
Decision Support System Of Fruit Cultivation Using Technique For Other Reference Method By Similarity To Ideal Solution (TOPSIS)
Authors: Yulianti Eva , Nanda Rahmat Rizki
Published: October 2018

Fruit cultivation is very promising for farmers. But there are problems faced by farmers, namely the lack of understanding of farmers with natural conditions that can affect crop yields. So with the selection of plants that are not appropriate, it does not get satisfactory results. Various types of fruit crops can be cultivated by farmers, such as oranges, guava, rambutan, watermelon, avocado, and so on. But it should be noted, that in the cultivation is expected to be cultivated plants in accordance with natural circumstances. This Designing created application to help determine the cultivation of fruit crops. In determining the cultivation of fruit crops in accordance with the criteria using the Technique Method for Others Reference by Similarity to Ideal Solution (TOPSIS) as a tool to facilitate decision-making process with several criteria of comparison, namely: temperature, sunlight, rainfall and humidity, height, harvest, selling power, susceptibility to disease, and care levels. This application is made based on the web by using PHP as a programming language and MySQL as the data storage. The use of decision support system application of the cultivation of these fruit crops can provide an output or alternative in accordance with the natural state of the area. And helps in making decisions to determine which fruits are suitable for cultivating for users based on selected criteria.
Motorcycle Parking Design with Simulation Approach Case Study: Rusunawa Penjaringan Sari 3, Surabaya
Authors: Krisnanda Yohanes R. , Hapsari Indri , Arlianto Jerry A. , Tjahjoanggoro Anton J. , Hartono Markus , Tondok Marselius S.
Published: October 2018

Rusunawa Penjaringan Sari 3 is flats owned by Surabaya City government with capacity 99 units. The current motorcycle parking lot has a total area 185.61 m2 and the parking slot dimension is 2 m X 0.7 m. It can accommodate 100 until 145 motorcycles. This limitation space makes motorcycles must park randomly and irregularly, such as parking at the space for people walking and parking in parallel that can block a motorcycle that wants to go out. Improvements that we did for parking layout in this research is based on parking standard, published by Indonesia Directorate General of Land Transportation. Each motorcycle has parking alternative slot dimension 2 mx 0.85 m and the aisle width is 1.6 m and double way. Using simulation approach by ProModel, we developed 4 alternatives and compared them. The average time for residents to de-park until leave from parking space motorcycles decreased from 56.118 seconds to 17.342 seconds (alternative 1), 17.2273 seconds (alternative 2), 21.986 seconds (alternative 3), and 17.242 seconds (alternative 4).
Design of Fuel Anti-theft Based on Micro-controllers using Short Message Service
Authors: Syofian Andi , Yultrisna
Published: October 2018

Theft of premium oil in Tank Trucks is very frequent done by irresponsible people. In general, the tank security system uses only the seal on the door of the faucet, therefore the seal can still be duplicated. To overcome this problem, its security system needs to be transferred to an electronic system with premium automatic delivery system control using HC-SR04 ultrasonic sensors and push-button. The system will send the fuel level information (premium) with SMS and display on the LCD when the charging or distribution is complete. There are 3 (three) premium levels that will be applied to the system. The first delivery condition of the tank is a 5 liter tank, the second condition from the tank to the gas station 1 3 liters and the third condition from the tank to the gas station 2 that is 2 liters. This system starts by activating the push button that functions as a motor drive switch and ultrasonic HC-SR04 sensor to detect premium level heights when premium sensitivity reaches heights will turn off the wiper motor driver. Premium volume will be informed to the user (the owner of the tank in the form of SMS using the SIM 900. The advantage of this tool is to detect premium theft in the premium tank by sending SMS ownership from the tank. This system can detect the theft of premium tanks via SMS, apply ultrasonic sensors (HC -SR04) to detect premium level heights the type of mass of the 0.76 kg premix affects the height at the volume of the tank. When the high volume of the 5 liter tank between the sensor and the premium is 7.63 cm, when the 2 liter volume high between the sensor and the premium is 13, 63 cm, while at the time of empty tank (0 liters) the height of sensor with premium is 17,63 cm.
Identification Of Number Using Artificial Neural Network Backpropagation
Authors: Amalia Sitti
Published: October 2018

This research proposed to design and implementation system of voice pattern recognition in the form of numbers with offline pronunciation. Artificial intelligent with backpropagation algorithm used on the simulation test. The test has been done to 100 voice files which got from 10 person voices for 10 different numbers. The words are consisting of number 0 to 9. The trial has been done with artificial neural network parameters such as tolerance value and the sum of a neuron. The best result is shown at tolerance value varied and a sum of the neuron is fixed. The percentage of this network training with optimal architecture and network parameter for each training data and new data are 82,2% and 53,3%. Therefore if tolerance value is fixed and a sum of neuron varied gave 82,2% for training data and 54,4% for new data
A Study of a CCD Camera for Vibration Measurement
Authors: Amin Zulkifli , Ikhsan Muhammad
Published: October 2018

Vibration may occur in rotating equipment, for example on the transmission shaft of the gear. If the motor rotation is high enough, the load and torque could also be large enough. So that it can cause the shaft to vibrate and this vibration can damage the shaft. Therefore, the magnitude of vibration of the shaft need to be measured in order to monitor that the magnitude of the vibration is not high enough to damage the shaft. Usually for measuring the magnitude of this vibration is used a vibration meter. The weakness of the vibration meter is that the method of the measurement is by touching the measured object. So this measuring instrument is easily damaged by the vibration. An alternative to measure the vibration of a shaft is by applying an image processing method. Image processing is a method that performs processing of images digitally. The measurement of vibration by image processing method is tested on a vibrating shaft. The image of the vibrating shaft is captured by a CCD camera and then processed by a Matlab program to extract the value of vibration amplitude. From the tests performed, the measurement of vibration using the image processing method, the measurement can be done without touching the vibrating shaft. The obtained values of amplitude are deviate about 5.73% in average from the theoretical values. This method and tools can be used to measure the rotating shaft vibration amplitude provided the measurement instrument is calibrated prior being used by considering the value of deviation.
Partial Discharge Analysis on Isolator of Transformer
Authors: Antonov Bachtiar , Thomas Thomas
Published: October 2018

Transformer has an important role in the world of electricity, especially high voltage. The selection of transformer isolation and routine maintenance should be in the same direction to maintain the reliability of transformer performance and work safety. Partial discharge is caused by many factors, both from the transformer itself, breakdown voltage and the use of an old transformer. The external factor is the temperature around the transformer which results in a decrease in the reliability of the insulator. Both must be based on a standard. As technology advances, in the field of electrical, electronics, computerization has a standard called IEEE Std C57.104 ™ -2008 which is a revision of IEEE Std C57.104-1991. It is designed for science and technology guidance concerning all provisions concerning the security of the worker itself. Which later, by applying the standard is expected transformer service users can suppress loss of production and work accidents. Indication of occurrence of Partial discharge (PD) occurs in transformer at MCC CLO2 (transformer 1) where TDCG 25975 ppm and transformer EN-2M also occur Partial Discharge (transformer 2) with TDCG 5920.6 ppm, while at transformer VE-12 (transformer 3) is still in normal condition where the TDCG value is only 630 ppm. If the Partial Discharge is fatal and damaging the transformer, replacement of the transformer should be done immediately. But the condition of the field not be done directly because of many stages to be done, which directly affect the production process and costs.
Stability Analysis of 20 kV System at PT PLN (PERSERO) Rayon Muaralabuh before and after Interconection by IPP (PLTMH PT. SKE)
Authors: Dewi Arfita Yuana , Effendi Asnal , Ridwan
Published: October 2018

In the rapid development of the world as it is today, the electricity has a very important role in supporting people activities. PT PLN (Persero), which in this case as Government State Owned Company that directly manage the provision of electrical energy is required to be ready to face the development of electricity demand in Indonesia. In distribution system of electricity, problems often occure because of the length of line distribution system which cause voltage drop, technical losses, power losses, etc. One of them happened to PT PLN (Persero) Rayon Muaralabuh. Where the distance between the main substation (GI Solok) with the first connecting substation is ±110 KMS. This distance cause 9.62 % voltage drop during peak load. This nominal of voltage drop happens for just the first connecting substation that will be the source of division for all working areas of PT PLN (Persero) Rayon Muaralabuh. This factor encourages PT PLN (Persero) West Sumatra Area Solok to agree if Independent Power Plant (IPP) takes part in generating electricity, which will be distribute to PT. PLN (Persero) West Sumatera Area Solok Rayon Muaralabuh through interconnection system. The simulation of power flow using Etap 12.6.0 is used to analyze the stability of 20 kV system voltage at PT PLN (Persero) Rayon Muaralabuh before and after interconnection. Based on the result of simulation and Etap calculation, the highest voltage drop before interconnection by IPP is on Feeder express LubukGadang which is 13,71 %. After the interconnection by IPP, the voltage drop on that feeder becomes 4,326%, and the highest voltage drop is 4,855 %. Therefore, the voltage drop after the interconnection by the IPP already meets the standards allowed by SPLN No. 72 of 1987 which is maximum 5 % voltage drop. The precentage of technical losses in PT PLN (Persero) Rayon Muaralabuh before interconnection is 13,074 %, and after interconnection is decreased to 8,306 %.
Crystal structure, thermal expansion and long-term behaviors of SmBaCoO5+δ as cathode for intermediate-temperature solid oxide fuel cells
Authors: Subardi Adi , Fu Yen-Pei
Published: October 2018

SmBaCo2O5+δ (SBC) was studied as cathode material for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The crystal structure, thermal expansion behavior, and electrochemical performance with long-term operation of SBC were characterized. An orthorhombic layered perovskite structure was observed in SBC cathode by a GSAS program for refinement. The average thermal expansion coefficient (TEC) is 21.6 x 10-6K-1 in the temperature range of 100oC-800oC. For long-term testing, the polarization resistance of SBC cathode increases gradually from 25.77 Ω cm2 for 2 h to 38.77 Ω cm2 for 96 h at 600°C, and an increasing-rate for polarization resistance is around 13,8% h-1. Based on the electrochemical properties, SBC cathode with mixed ionic and electronic conductor (MIEC) behavior is a potential cathode for intermediate temperature solid oxide fuel cells based on a SDC electrolyte.
Effect of pH on the stability of W1/O/W2 double emulsion stabilized by combination of biosilica and Tween-20
Authors: Sapei Lanny , Adiarto Tokok , Handomo Roi , Chandra Sonny Hutomo
Published: October 2018

Indonesia is amongst agricultural countries whose majority of the population consume rice as their staple food. Rice rice production tends to increase year by year followed by the increasing of their byproducts such as rice husks. The majority of rice husk waste has been generally thrown away by burning on site which cause pollution and may negatively impact on the environmental sustainability. In fact, rice husk waste contains of about 20% silica which potentially be used as emulsion stabilizers. Biosilica could stabilize the interface between water and oil due to their hydrophilicity and hydrophobicity characteristics in nature. However, their wettability was greatly influenced by pH. In this experiment, the effect of pH of the outer continuous phase (W2) was investigated. The primary emulsion (W1/O) was prepared by mixing a 40% water phase containing gelatin 3% w/w relative to the aqueous phase and Tween-20 of 1.1% w/w relative to the primary emulsion with the remaining oil phase for 5 minutes. The primary emulsions were then dispersed into the aqueous phase (W2) of various pH (2; 3; and 5.7) by using a mixture of Tween-20 and biosilica as emulsifiers. The result showed that the most stable double emulsion was obtained upon the acidic pH of 2. There was no differences between the stability of double emulsion prepared at pH 2 and that of pH 3 after 7 days. However those prepared without pH adjustment (5.7) tended to be instable in the long-term. This implied that acidic pH would increase the packing density of biosilica in the interfaces thus enhancing the barrier properties of the droplets against coalescences. A stable food grade double emulsion would be very beneficial to develop low-fat emulsion products in various food applications. Furthermore, the inner aqueous phase could be used as a vehicle to encapsulate bio-active agents such as nutrients or antioxidants for the advancement of developments of functional food products.
Effects of Single and Multi Openings in Brick Infills on the Seismic Response of Infilled RC Frames
Authors: Maidiawati  , Tanjung Jafril , Medriosa Hamdeni , Hayati Yulia
Published: October 2018

Many researchers have performed a lot of studies of the seismic behavior reinforced concrete (RC) frame with masonry infill. They found that masonry infill affects the lateral strength, stiffness and ductility performance of the RC frame structures. However, when openings appeared in the panel infill for door and windows, the responses of the overall structure are entirely changed. The primary purpose of this study is to experimentally investigate the behavior of brick infilled RC frames possessing single opening and two openings. Four specimens of 1/4-scale single bay RC frames with brick infills were made that were one bare frame, one frame with full infill and two frames with infills having a central opening and two openings with the opening ratio of 25%. The specimens were tested under lateral reversed cyclic loads. Consequently, different responses of failure mechanism, lateral strength, stiffness and energy dissipated were observed among the specimens. The brick full infill failed in shear with propagation cracks in central part of the panel, but in the case of the infills with single and two openings, the cracks were dominated at the corners of the openings. The in-plane strength, stiffness and dissipated energy of infilled frames decreased when openings appeared in the panel. However, the seismic performance of brick infilled frame with the opening of 25% of panel area is better than those of bare frame. The brick infilled frames with a central opening and two openings are similar in lateral strength and dissipated energy. It seems that area and position of the openings control the seismic response to the overall infilled frame structure of the openings
Feasibility Analysis of Surface Rail in The Revitalization of The Railway Road
Authors: Wahab Wilton
Published: October 2018

The railway lines are an integral construction made of steel, concrete or other construction are located on the surface, below and above ground or dangling along with devices that direct the course of the train. Reflecting on the success of the revitalization of the railway line Padang-Pariaman, PT. Railway DIVRE II West Sumatra recently returned to the revitalization of the railway line Lubuk Alung–Kayu Tanam. In this final project feasibility analysis back to the road construction railroad Lubuk Alung-Kayu Tanam considering this path has not been used and an increase in the construction of the railroad on the route. The methodology used is the collection of data from related parties subsequently perform the calculation and analysis of railroad construction that has been revitalized. Data obtained from the calculation of the voltage rails on existing condition of 1380.34 kg/cm2 and the voltage rails after revitalized by 840.601 kg/cm2 while rail voltage maximum allowed is 1325 kg/cm2, the rail existing deserves to be revitalized. Iron bearing on the condition of the existing able to withstand a load of 6761.69 kg, while the load caused by railbus is 8568.986 kg so that the iron bearing existing not worth traversed railbus axle 18 ton and made improvement to the concrete pads. After upgrading, held their concrete pads capable of 23241.678 kg load and expenses incurred as a result of railbus axle 18 tons of concrete pads amounted to 6986.276. Concrete pads so deserve to be passed railbus axle 18 tons. The results of this thesis states that the construction of a rail road Lubuk Alung-Kayu Tanam deserves to be revitalized because of the condition of the existing construction rails and bearings are not able to withstand the stresses and loads that occur due railbus 18 tons passing through.
Fluctuations and temperature effects in bose-einstein condensation
Authors: de Bouard Anne , Debussche Arnaud , Fukuizumi Reika , Poncet Romain
Published: October 2018

The modeling of cold atoms systems has known an increasing interest in the theoretical physics community, after the first experimental realizations of Bose Einstein condensates, some twenty years ago. We here review some analytical and numerical results concerning the influence of fluctua-tions, either arising from fluctuations of the confining parameters, or due to temperature effects, in the models describing the dynamics of such condensates.
A survey on well-balanced and asymptotic preserving schemes for hyperbolic models for chemotaxis
Authors: Ribot Magali
Published: October 2018

Chemotaxis is a biological phenomenon widely studied these last years, at the biological level but also at the mathematical level. Various models have been proposed, from microscopic to macroscopic scales. In this article, we consider in particular two hyperbolic models for the density of organisms, a semi-linear system based on the hyperbolic heat equation (or dissipative waves equation) and a quasi-linear system based on incompressible Euler equation. These models possess relatively stiff solutions and well-balanced and asymptotic-preserving schemes are necessary to approximate them accurately. The aim of this article is to present various techniques of well-balanced and asymptotic-preserving schemes for the two hyperbolic models for chemotaxis.
Quelles ressources interactionnelles pour la conception de jeux épistémiques numériques?
Authors: Markaki-Lothe Vasiliki , de Vries Erica , Lund Kristine
Published: October 2018

L’ouverture actuelle des jeux de formation vers des environnements hybrides (numériques et non numériques) et des objectifs d’apprentissages plus larges complexifie la nature des interactions entre les acteurs durant les différentes phases de la conception d’un tel jeu et interroge les pratiques mobilisées. Notre étude s’attache à décrire les ressources interactionnelles mobilisées lors de la conception de jeux épistémiques numériques. En nous appuyant sur des enregistrements vidéo, nous nous intéressons à la manière dont les pratiques des participants, au fil des différentes phases de la conception d’un jeu, configurent les interactions. Au-delà de l’intérêt théorique, la problématisation des ressources mobilisées est nécessaire à une meilleure compréhension des mécanismes mis en oeuvre pour la production d’un jeu et pour l’apprentissage des joueurs. Elle permet ainsi un éclairage sur les conditions qui pourraient avoir un effet sur l’efficacité de ce type de dispositifs.
Les trajectoires documentaires, une proposition de modèle pour analyser les interactions des enseignants avec les ressources au fil du temps: la plateforme AnA.doc, un outil d’instrumentation de cette analyse
Authors: de Moraes Rocha Katiane
Published: October 2018

Cet article souhaite contribuer à la discussion de la question : comment le chercheur conçoit-il et traite-t-il ses données ? Nous présentons un exemple d’analyse et de traitement des données en nous appuyant sur le développement de la plateforme AnA.doc. Nous présentons ici les réflexions théoriques et méthodologiques qui ont servi de base pour créer cet outil, telles l’approche documentaire du didactique et l’investigation réflexive. Pour cela nous mobilisons l’exemple d’une enseignante de mathématiques au collège, Sophie, analysé comme une étude de cas dans le cadre d’une recherche doctorale. L’objectif de recherche est de comprendre comment les enseignants construisent leur expérience avec les ressources tout au long de leur carrière. L’analyse partielle montre comment une ressource donnée structure la pratique d’un enseignant. L’objectif de la plateforme est finalement de constituer un incubateur d’analyse du travail documentaire des enseignants.
Providing Meaningful Interactions at KOSEN between Japanese and International Students
Authors: Grumbine Richard , Aka Natsuki , Hirano Riho
Published: October 2018

Internationalizing the Japanese students at KOSEN has proven difficult. While KOSEN welcomes international students with the hope of internationalizing the almost entirely Japanese student body, the challenge has been to get the Japanese students to interact with the international students and take advantage of the opportunity. Far too often international students live in a bubble and have meaningful contact with only a few students. This leaves the international students feeling isolated and the Japanese students not benefiting from the opportunity that KOSEN is trying to provide. Ariake KOSEN attempted to address this problem in two ways. A discussion class which included international students was created where the students were expected to discuss pre-assigned topics in small groups over the course of a semester. These groups often contained an international student. This forced exposure created a chance for Japanese students to communicate with international students. This communication was then seen continuing well beyond the discussion exercises. A survey was given at the completion of the one semester class to evaluate effectiveness. The results show that students found the opportunity to be helpful and in line with their own learning goals. Another approach was to create a more casual place for students to gather and interact with international students. An English Lab was created to give the students a place to interact outside of the traditional classroom atmosphere. This second effort is just in the beginning stages but the basic ideas are laid out in this paper. Anecdotal evidence seems to suggest that the Lab is working, with usage on the part of Japanese students being high, but the international students seem less inclined to use the room.
Usability of QiraahBot for extensive Arabic reading activities
Authors: Mustapa Al-Muslim , Nawawi Zulkifli , Ghani Salamiah Ab. , Abdul Rahman Maryam , Shaadon Zuraida , Mustapa Nur Syazwina
Published: October 2018

Today’s changing learning landscape urges the integration of mobile phone technology and Arabic learning as a foreign language. Learning through mobile phones is seen as a potential teaching aids which demonstrate effectiveness in teaching and learning activities. A QiraahBot prototype was built to aid the implementation of extensive Arabic reading activities. The user’s perspective on QiraahBot’s usability is essential for the effectiveness of learning through mobile phone applications. This study aims to identify the level of usability of the QiraahBot application prototype and to explore the deeper experience of users using the application. Therefore, a group of 30 student users was involved in the study. They were assigned tasks to be completed within the specified periods via the application, and then given an open-ended questionnaire adapted from the System Usability Scale. The findings show that the QiraahBot usability level is moderate. The study also revealed some of the advantages of QiraahBot as easy to use and the ability to help the learning process. In addition, there are weaknesses in applications, especially aspects of application usability, which needs to be improved in the next version. The researcher has provided some suggestions for further studies that are more comprehensive in the future.
Technological infrastructure and human culture: Appropriating innovative teaching methods to 21st century classrooms
Authors: Chong Su Li , Wan Roselind
Published: October 2018

Often, it is assumed that the introduction of technological infrastructures into the 21st century classroom will provide the catalyst to appropriating innovative methods befitting modern educational frameworks. One of these appropriations is the introduction of technology like wireless connectivity, interactive smartboards and mobile devices in the shift from applying teacher-centredness to student-centredness in the classroom. However, this shift is often discussed in terms of technological infrastructure, to the exclusion of examining the cultural change that occurs as a result. This paper discusses findings from a study which set out to examine the effectiveness of electronic marginalia (e-marginalia) in a university classroom for Academic Writing, with e-marginalia being regarded as a technological infrastructure. Drawing from principles of Action Research, this study adopted a constructivist perspective which framed its research design. In the course of 14 weeks, 2 groups of 25 Engineering and Technology undergraduates respectively, underwent draft-writing through the use of Microsoft® track-change function and e-mail communication with two lecturers. This method of classroom and online engagement tested the extent to which infrastructure and human culture could align in a writing course. Data was also drawn from students and lecturers’ feedback with regards to their 14-week experience of learning and teaching through new methods. Findings from this study show that when human culture and behaviour is considered, technological infrastructure can be capitalised through the cultural appropriation of human-relationship-sustenance and technological-content-identification. These findings answer the question of teacher-relevance in the Education 4.0 framework. Thus, not only are teachers still very relevant to current pedagogies, it is their sociocultural sensitivities that are tested and confronted. As such, in accommodating new ways of teaching and learning that must chime with Education 4.0, this paper advocates for new forms of openness in 21st century education.
AMICal Sat and ATISE: two space missions for auroral monitoring
Authors: Barthelemy Mathieu , Kalegaev Vladimir , Vialatte Anne , Le Coarer Etienne , Kerstel Erik , Basaev Alexander , Bourdarot Guillaume , Prugniaux Melanie , Sequies Thierry , Rolland Etienne , Aubert Emmanuelle , Grennerat Vincent , Ayasso Hacheme , Busom Vidal Arnau , Apper Fabien , Stepanov Mikhail , Escudier Benedicte , Croize Laurence , Romand Frederic , Payan Sebastien , Panasyuk Mikhail
Published: October 2018

A lack of observable quantities renders it generally difficult to confront models of Space Weather with experimental data and drastically reduces the forecast accuracy. This is especially true for the region of Earth’s atmosphere between altitudes of 90 km and 300 km, which is practically inaccessible, except by means of remote sensing techniques. For this reason auroral emissions are an interesting proxy for the physical processes taking place in this region. This paper describes two future space missions, AMICal Sat and ATISE, that will rely on CubeSats to observe the aurora. These satellites will perform measurements of auroral emissions in order to reconstruct the deposition of particle precipitations in auroral regions. ATISE is a 12U CubeSat with a spectrometer and imager payloads. The spectrometer is built using the micro-Spectrometer-On-a-Chip (μSPOC) technology. It will work in the 370–900 nm wavelength range and allow for short exposure times of around 1 s. The spectrometer will have six lines of sight. The joint imager is a miniaturized wide-field imager based on the Teledyne-E2V ONYX detector in combination with a large aperture objective. Observation will be done at the limb and will enable reconstruction of the vertical profile of the auroral emissions. ATISE is planned to be launched in mid 2021. AMICal Sat is a 2U CubeSat that will embed the imager of ATISE and will observe the aurora both in limb and nadir configurations. This imager will enable measuring vertical profiles of the emission when observing in a limb configuration similar to that of ATISE. It will map a large part of the night side auroral oval with a resolution of the order of a few km. Both the spectrometer and imager will be calibrated with a photometric precision better than 10% using the moon as a wide-field, stable and extended source. Ground-based demonstrators of both instruments have been tested in 2017 in Norway and Svalbard. Even though some issues still need to be solved, the first results are very encouraging for the planned future space missions. Data interpretation will be done using the forward Transsolo code, a 1D kinetic code solving the Boltzmann equation along a local vertical and enabling simulation of the thermospheric and ionospheric emissions using precipitation data as input.
Expertenstandard „Beziehungsgestaltung in der Pflege von Menschen mit Demenz“
Authors: Schumann Susette
Published: October 2018

Pflegekompetenz Im neuen Expertenstandard hat die Expertenarbeitsgruppe des DNQP den Fokus auf das Thema Beziehungsgestaltung gelegt. Für Menschen mit Demenz ergibt eine positive Beziehungsgestaltung und eine verlässliche Bindung Sicherheit. Die Wahrnehmung dieser Menschen und ihrer Bedürfnisse nach einer sicheren Beziehung ist eine pflegerische Kompetenz und spiegelt sich in der Auswahl entsprechender Interventionen wider.
Geriatrisches Assessment Instrumentelle Aktivitäten des täglichen Lebens
Authors: Zemke Jens
Published: October 2018

Alltagskompetenz Mit voranschreitendem Alter sind die meisten Menschen von sozialen, körperlichen und psychischen Aktivitätseinschränkungen betroffen. Autonomieverlust und fehlende Selbsthilfefähigkeit bleiben häufig unentdeckt und somit auch lange unbehandelt. Im geriatrischen/gerontologischen Behandlungsumfeld wurden als Basis für eine gezielte Behandlungsplanung Assessmentinstrumente entwickelt, die eine einfache, valide und multiprofessionelle Einschätzung der Behandlungssituation zulassen und somit die pflegerische Betreuungsqualität steigern.
MRSA in der Reha-Klinik – praktische Gesichtspunkte
Authors: Flade Susanne
Published: October 2018

Praxis MRSA kommt inzwischen in jeder Lebenswelt vor und macht auch vor Rehabilitationskliniken nicht halt. Eine besondere Vulnerabilität weisen
Rehabilitanden im höheren Lebensalter auf. Sind besondere Maßnahmen erforderlich, um betroffenen älteren Menschen eine Rehabilitation zu ermöglichen? Der
Beitrag schildert einige aktuelle Gesichtspunkte aus Sicht einer Hygienefachkraft zu diesem Thema.
Die Genehmigungsfiktion – Stärkung der Interessen betroffener Menschen durch das Rechtsinstitut der Genehmigungsfiktion
Authors: Stähler Thomas
Published: October 2018

Die Genehmigungsfiktion ist eine schon lange bekannte Rechtsfigur im deutschen Verwaltungsrecht. Diese dient der Verfahrensvereinfachung und -beschleunigung. Hiermit ist zugleich die EU-Dienstleistungsrichtlinie
1 im deutschen Recht umgesetzt.
Altering Physical Activity Influences Insulin Responses to Glucose Ingestion in Healthy Adults
Authors: Timmerman Kyle , Ballard Kevin , Volk Gabrielle , Deal Michael , Meisler Adam , Karrow Jenna , Good Alex , Reynolds Sandy
Published: October 2018

This study determined if varying physical activity (PA) the day prior to an oral glucose tolerance test (OGTT) differentially influenced postprandial glucose and insulin kinetics. Fifteen healthy, young adults participated in three OGTT trials the morning after performing 50% (LOW), 100% (HABITUAL), or 150% (HIGH) of their habitual PA (determined by 7-day pedometry). Trials were randomized and separated by at least 1-wk. For each OGTT trial, blood glucose and insulin were measured after an overnight fast and at 30-min intervals for 2 h following ingestion of the glucose beverage. Between-trial differences were analyzed using a general linear model with repeated measures. Subjects successfully achieved the desired percentage of habitual steps prior to each trial: LOW: 51±5%, HABITUAL: 99±6%, and HIGH: 149±9%. Fasting blood glucose and glucose total area under the curve (AUC) did not differ between trials. Serum insulin AUC was lower (p<0.05) following the HIGH (34,158±8,786 pmol·min·L−1) compared to the LOW (40,738±9,276 pmol·min·L−1) trial. No differences were observed when the LOW and HIGH trials were compared to HABITUAL. These data suggest that varying the PA level (from 50 to 150% of habitual PA) the day prior to an OGTT influences the insulin (but not blood glucose) response to an OGTT.
Zinc-Catalyzed Synthesis of Dithioacetals through Double Hydrosulfenylation of Alkynes by Thiols
Authors: Taniguchi Nobukazu , Kitayama Kenji
Published: October 2018

Zinc-catalyzed hydrosulfenylation of alkenes can be performed in various solvents, and the corresponding products are obtained regioselectively. Dihydrosulfenylation of alkynes with thiols can also be achieved by using a zinc catalyst, and the reaction is preferentially promoted over monohydrosulfenylation. The reaction can also give dithioacetals regioselectively in excellent yields.
Total Synthesis of Lycoposerramine-R
Authors: Yokoshima Satoshi , Watanabe Shinya , Ishikawa Masatsugu , Nomura Toshimune , Fukuyama Tohru
Published: October 2018

A total synthesis of lycoposerramine-R was accomplished. The synthesis featured a Claisen–Ireland rearrangement to install a two-carbon unit, and a hetero-Diels–Alder reaction to form a cyclic enol ether that reacted with an ethynyl group to construct a cis-hydrindane core containing a quaternary carbon. A 2-pyridone synthesis using 2-(phenylsulfinyl)acetamide was used to complete the synthesis.
Asociación entre obesidad y diagnóstico de cáncer de próstata en adultos mayores: análisis secundario de la encuesta SABE
Authors: Carreño Gabriel Leonardo , Arciniegas Antonio Jose , Ramos Ulloa Jose Gustavo , Mayans Gianluca Gasca , Cano Carlos Alberto
Published: October 2018

Introducción El síndrome metabólico es una condición muy prevalente en nuestra sociedad, y durante las últimas dos décadas la prevalencia ha aumentado significativamente convirtiéndose en un problema con una carga en salud importante. El cáncer de próstata por su parte es la primera causa de cáncer en hombres en el mundo. Numerosos estudios han sugerido una asociación entre la presencia de síndrome metabólico y el diagnóstico de cáncer de próstata. La información acerca de la asociación Del cáncer de próstata y obesidad es controversial. Nuestro objetivo es determinar si existe una relación entre la presencia de obesidad y el diagnóstico de cáncer de próstata en adultos mayores de la ciudad de Bogotá.

Objetivos y Métodos Se analizaron los datos del estudio Salud, Bienestar y Envejecimiento (SABE) Bogotá 2012. Se utilizó como variable dependiente el autorreporte de examen de próstata en los 2 últimos años y se evaluó con respecto a variables antropométricas así como factores sociodemográficos por medio de un análisis multivariado.

Resultados La prevalencia de cáncer de próstata fue de 3,15%. El 31.9% de los hombres tienen un IMC mayor de 30. Se encontró una asociación significativa entre el IMC y el diagnóstico de cáncer de próstata (p = 0.005), Enfermedad coronaria y cáncer de próstata (p = 0.03) y nivel de escolaridad y diagnóstico de Cáncer de próstata (p = 0.012).

Conclusión Nuestro estudio demuestra que existe una asociación significativa entre estas dos entidades en una población bogotana de adultos mayores. Es necesario realizar más estudios que aporten mayor información acerca de esta asociación.
Reisen mit Kindern
Authors: Lindert J. , Kotsias-Konopelska S.
Published: October 2018

Immer mehr Familien mit Kindern unternehmen Auslandsreisen. Die Fortbewegungsmittel sind dabei sehr variabel und die Reiseplanung sehr individuell. Eine kinderärztliche Reiseberatung kann konkret zu einigen Themen erfolgen. Der erste Teil des Artikels in dieser Ausgabe befasste sich mit Empfehlungen bei Sonnenexposition, im zweiten Teil geht es um Zeitverschiebung, Klimaanpassung, Höhenkrankheit sowie Rad- und Autoreisen. Reisen in andere Zeitzonen sind mit kleinen Kindern einfacher als mit großen. Dauermedikationen müssen individuell an neue Zeitzonen angepasst werden. Eine Höhenkrankheit, eine Überhitzung oder Unterkühlung zeigen sich durch unspezifische Symptome. Langsame Akklimatisation, gute Beobachtung des Kindes und grundlegende Erste-Hilfe-Maßnahmen sind essenziell. Bei Reisen mit Auto oder Rad steht die Sicherheit im Vordergrund. Die Kenntnis lokaler Verkehrsregeln, eine gute Reiseplanung sowie das passende Equipment sind wichtig. Detaillierte Informationen über die Reiseorte können oft aus der Literatur, aber auch aus Blogs dorthin Gereister entnommen werden.
Conductance fluctuation in NiO-based resistive switching memory
Authors: Nishi Yusuke , Sasakura Hiroki , Kimoto Tsunenobu
Published: October 2018

In nonvolatile resistive memory and neuromorphic computing, the formation and rupture of a conductive filament after the forming process causes a reversible resistance transition between low- and high-resistance states. We confirm herein that conductance fluctuations by sweeping the applied voltage before and after “semi-forming” appear in Pt/NiO/Pt resistive switching cells through an investigation of nonpolar resistive transitions after semi-forming and “second forming.” The increase in conductance owing to conductance fluctuations originates from the modification of oxygen-vacancy densities at grain boundaries in the NiO layer. Moreover, this modification may disappear at 470 K. The influence of a significant Joule heating caused by current through a fat filament created by second forming determines whether the cell conductance after the reset takes on the value of the conductance just after second forming or that of the initial conductance. Thus, Joule heating seems to be the driving force behind the reset in Pt/NiO/Pt cells.