bluuebunny/crossref_metadata_2025 huggingface dataset:
Probing Motion of Fast Radio Burst Sources by Timing Strongly Lensed Repeaters
Authors: Dai Liang , Lu Wenbin
Published: September 2017

Given the possible repetitive nature of fast radio bursts (FRBs), their cosmological origin, and their high occurrence, detection of strongly lensed sources due to intervening galaxy lenses is possible with forthcoming radio surveys. We show that if multiple images of a repeating source are resolved with VLBI, using a method independent of lens modeling, accurate timing could reveal non-uniform motion, either physical or apparent, of the emission spot. This can probe the physical nature of FRBs and their surrounding environments, constraining scenarios including orbital motion around a stellar companion if FRBs require a compact star in a special system, and jet-medium interactions for which the location of the emission spot may randomly vary. The high timing precision possible for FRBs (∼ms) compared with the typical time delays between images in galaxy lensing (≳10 days) enables the measurement of tiny fractional changes in the delays (

) and hence the detection of time-delay variations induced by relative motions between the source, the lens, and the Earth. We show that uniform cosmic peculiar velocities only cause the delay time to drift linearly, and that the effect from the Earth’s orbital motion can be accurately subtracted, thus enabling a search for non-trivial source motion. For a timing accuracy of ∼1 ms and a repetition rate (of detected bursts) of ∼0.05 per day of a single FRB source, non-uniform displacement ≳0.1–1 au of the emission spot perpendicular to the line of sight is detectable if repetitions are seen over a period of hundreds of days.
Non-local Thermodynamic Equilibrium Stellar Spectroscopy with 1D and 〈3D〉 Models. II. Chemical Properties of the Galactic Metal-poor Disk and the Halo
Authors: Bergemann Maria , Collet Remo , Schönrich Ralph , Andrae Rene , Kovalev Mikhail , Ruchti Greg , Hansen Camilla Juul , Magic Zazralt
Published: September 2017

From exploratory studies and theoretical expectations it is known that simplifying approximations in spectroscopic analysis (local thermodynamic equilibrium (LTE), 1D) lead to systematic biases of stellar parameters and abundances. These biases depend strongly on surface gravity, temperature and, in particular, for LTE versus non-LTE (NLTE), on metallicity of the stars. Here we analyze the [Mg/Fe] and [Fe/H] plane of a sample of 326 stars, comparing LTE and NLTE results obtained using 1D hydrostatic models and averaged

models. We show that compared to the

NLTE benchmark, the other three methods display increasing biases toward lower metallicities, resulting in false trends of [Mg/Fe] against [Fe/H], which have profound implications for interpretations by chemical evolution models. In our best

NLTE model, the halo and disk stars show a clearer behavior in the [Mg/Fe]–[Fe/H] plane, from the knee in abundance space down to the lowest metallicities. Our sample has a large fraction of thick disk stars and this population extends down to at least [Fe/H] ∼ −1.6 dex, further than previously proven. The thick disk stars display a constant [Mg/Fe] ≈ 0.3 dex, with a small intrinsic dispersion in [Mg/Fe] that suggests that a fast SN Ia channel is not relevant for the disk formation. The halo stars reach higher [Mg/Fe] ratios and display a net trend of [Mg/Fe] at low metallicities, paired with a large dispersion in [Mg/Fe]. These indicate the diverse origin of halo stars from accreted low-mass systems to stochastic/inhomogeneous chemical evolution in the Galactic halo.
Des secteurs qui rayonnent
Authors: Morin Marie-Claude
Published: September 2017

La culture et le divertissement font briller Montréal de mille feux pour son 375 e anniversaire. Pas étonnant qu’ils jouent un si grand rôle dans les festivités : 2,3 millions de personnes, soit le quart de tous les touristes, visitent la métropole pour sa culture et ses attraits, tandis que 36 % de la couverture médiatique internationale de Montréal est liée à sa vie culturelle. Tour d’horizon des créneaux qui rayonnent.
Transformation numérique des entreprises : faites-en votre priorité !
Authors: Dussart Christian
Published: September 2017

Tout le monde s’accorde à dire que la transformation numérique des entreprises est une priorité stratégique majeure, si ce n’est la plus importante de toutes. Et pour cause ! L’hégémonie du numérique est la raison pour laquelle un peu plus de la moitié des entreprises du Fortune 500 ont disparu depuis l’an 2000. Mais qu’est-ce qui cloche dans cette mutation ? Voici des pistes de solution résolument orientées vers l’action.
Comprendre les bifurcations dans les parcours professionnels
Authors: Denave Sophie
Published: September 2017

Cet article vise à rendre compte de bifurcations professionnelles opérées en cours de carrière par des hommes et des femmes de divers milieux sociaux. Il s’agit de discuter de façon critique la terminologie (mobilité, reconversion, rupture, bifurcation) disponible pour évoquer ces parcours statistiquement peu fréquents et de montrer l’apport d’une analyse processuelle. Plus précisément, nous montrons l’intérêt de reconstruire les étapes du processus en mobilisant une analyse qui articule dispositions et contextes. Cette approche permet non seulement de dérouler les enchaînements qui conduisent à changer radicalement de métier et de domaine professionnel, mais aussi de mettre au jour le jeu des inégalités sociales et genrées au cours de ces parcours. On se propose ensuite d’analyser deux « cas » distincts qui permettent chacun à leur façon de décrire les tensions et difficultés auxquelles les enquêtés font face de façon variable selon leur position sociale et familiale.
Ethical and psychological factors in 5S and total productive maintenance
Authors: Hama Kareem Jamal Ahmed , Hama Amin Othman Abdul-Qader
Published: September 2017

Purpose: The purpose of this paper is to investigate the role of ethical and psychological factors in the implementation of 5S and TPM at cement plants in Kurdistan Region of Iraq.Design/methodology/approach: The mixed methods represented in a questionnaire survey and semi-structured interviews for data collection in the framework of the case study were chosen. The questionnaire survey already has been tested.Findings: The findings of this paper revealed that ethical factors had a larger role than psychological factors in the implementation. Thus, based on the findings, organisations are recommended to provide financial and moral support to employees to enable a comprehensive implementation of 5S and TPM aimed at obtaining the desired results. Originality/value: The current paper tried to introduce a new theoretical contribution by filling the gap in the literature regarding the important role that can be played by ethical and psychological factors of employees in the successful implementation of contemporary techniques, such as 5S and TPM in industrial organizations. This is contrary to what was done most of previous studies such as Ahuja & Khamba, (2008b) Panneerselvam (2012) Singh et al. (2013) and Poduval & Pramod (2015) in the area of 5S and TPM. Where, these studies have focused on studying the other factors such as (organizational, technological, operational and others) in implementing 5S and TPM. This without realizing the fact that it is also necessary to examine factors such as (ethical and psychological) that would affect the capabilities and employee morale before and during the implementation of those techniques (5S and TPM) that are used to bring out the best productivity.
Bendecir para saludar en Plauto. Redistribución de la función pragmática
Authors: Berger Łukasz
Published: September 2017

Este artículo se ocupa de la redistribución de una función pragmática, esto es, repragmaticalización (fenómeno también conocido como «discursivización ») de las fórmulas latinas de bendición. La repragmaticalización de estas expresiones consistió en su reinterpretación como expresiones de agradecimiento rutinizadas, para, finalmente, funcionar como unas fórmulas de saludo (di tibi dent quae uelis!; di te ament!). En primer lugar, se lleva a cabo un análisis de los comienzos de diálogo que incluyen estas expresiones. Además, el artículo ofrece algunas referencias adicionales al sistema romano de la retribución compensatoria, que ha sido relacionado con las rutinas comunicativas de agradecer y saludar. A modo de conclusión, se ofrecen algunas reflexiones sobre los procesos de repragmaticalización.
Claudio Ptolomeo y el lenguaje. Un comentario a Iudic., 2-6
Authors: Redondo Reyes Pedro
Published: September 2017

El tratado Sobre el juicio y el principio rector de Claudio Ptolomeo, consagrado al estudio de los criterios de conocimiento, constituye el marco epistemológico de la práctica científica de este autor. Para Ptolomeo el lenguaje tiene un papel destacado como vehículo de transmisión del juicio, y en el tratado se estudia su relación con la parte racional del ser humano, así como su origen y propiedades filosóficas.
El ejemplo histórico en los discursos de Elio Aristides: el episodio de los heraldos de Darío en las Guerras Médicas (Panatenaico 97-100 Lenz-Behr)
Authors: Caballero López José Antonio
Published: September 2017

En este artículo estudiamos el uso del ejemplo histórico desde la perspectiva retórica en la oratoria de Elio Aristides. Los estudios al respecto se han dirigido hasta ahora a cuestiones propiamente históricas y de Quellenforschung. Nosotros partimos, sin embargo, de la determinación de los componentes persuasivos del discurso, en general, y del ejemplo (παράδειγμα), en particular, por el sistema de la Retórica. Analizamos, luego, cómo determinados temas y motivos históricos constituidos en παραδείγματα, esto es, en modelos y precedentes del pasado con valor retórico, se integran tanto en el tejido argumentativo como estilístico del discurso. El ejemplo histórico que analizamos aquí es el conformado en el Panatenaico con lo que sucedió en Atenas en el año 491 a. C. con los heraldos enviados a Grecia por Darío en los comienzos de la Primera Guerra Médica.
Osiris envuelto con la piel del cervatillo celeste: nota sobre D. S. I 11.4
Authors: Ortiz-García Jónatan
Published: September 2017

En este trabajo se propone una explicación para cierta información transmitida por Diodoro Sículo, según la cual el dios egipcio Osiris era envuelto con una piel de cervatillo con estrellas.
Casa de un arquitecto, Hörtekaer (Dinamarca)
Authors: Bo Jorgen
Published: September 2017

De una forma sencilla, pero admirablemente resuelta, ha sido diseñada esta vivienda, de dimensiones medias, compuesta de: tres dormitorios, estar, comedor, cocina, cuarto de baño, aseo, estudio en primera planta, desván y sótano. Es la morada del propio arquitecto.
Vivienda en las afueras de París
Authors: Parent Claude
Published: September 2017

Esta casa, destinada para habitación permanente de una familia joven —compuesta de marido, mujer y tres hijos—, aparece como una residencia verdaderamente importante en cuanto a su apariencia y distribución que responde al siguiente programa: cinco dormitorios con los servicios correspondientes, gran zona de recepción, amplio vestíbulo, sótano e instalaciones y almacenes.
Le concept de médium chez Arthur Danto : les choses banales comme médiums ?
Authors: Beaubois Vincent
Published: September 2017

Partant de la situation particulière dans laquelle Arthur Danto place la notion de « médium » dans La Transfiguration du banal (1981), il s'agit de rendre compte d'une évolution de sa pensée quant à la séparation ontologique qu'il instituait en 1981 entre œuvre d'art et objet d'usage banal. Dans cet ouvrage, Danto confronte le concept de « médium », hérité de l'analyse picturale, à des œuvres plastiques identiques en tout point à des artefacts quotidiens (une pelle à neige, un emballage de savon, etc.). Le concept va ainsi servir à instaurer philosophiquement une coupure entre l'artistique et le prosaïque. Toutefois, les derniers ouvrages de Danto tels La madone du futur (2000) ou Ce qu'est l'art (2013) commencent à brouiller cette disjonction ouvrant, par-là, la possibilité de penser les choses banales comme médiums.
Entrepreneurial Action as Metaphorical Process and its Metaphorics
Authors: Baryshev Alexey A.
Published: September 2017

The objective of this paper is to formulate new approach to entrepreneurship and its result that is challenged by appearance of novel spheres of entrepreneurial activity related to social innovations, social networks, solution for corporate management and people`s wellbeing, production of gadget for precarious wants. These items inspire the study of axiological bases of value created by entrepreneurs. This purpose suggests addressing and revisiting the notions of entrepreneurial action and value. Their complete conceptualization applying to nascent new economy is unlikely to be possible. With this in mind, we focused on searching for metaphors that can cast light on the specifics of newly-emerging phenomena related to entrepreneurial action and value created by it. Using the theory of metaphor, we find that entrepreneurial action is of metaphorical nature itself. In the article, the creation of value is described by means of the transferal of enterprising constituents of entrepreneur's identity onto produced things. We specify these constituents as referred to the different periods of entrepreneurial history. The identification of the constituents was based on the theory of pillars and carriers of institutions by W. R. Scott. The metaphors of appropriateness, utility and wellbeing were proposed for the different periods of the development of value. The metaphor of rhetoric was defined as a root metaphor for all moduses of entrepreneurial action considered as a process of convincing on the value of things produced. Special metaphors for entrepreneurial action for each period of value development were also proposed. The metaphor of performative rhetoric was considered as shedding light on dominant modus of entrepreneurial action and modus of value under conditions of knowledge society.
The Use of Software Tools in Linked Data Publication and Consumption
Authors: Barbosa Armando , Bittencourt Ig Ibert , Siqueira Sean Wolfgand Matsui , Silva Rafael de Amorim , Calado Ivo
Published: September 2017

To reduce the complexity intrinsic to LD manipulation, software tools are used to publish or consume data associated to LD activities. However, few developers have a broad understanding of how software tools may be used in publication or consumption of Linked Data. The goal of this work is to investigate the use of software tools in Linked Data publication and consumption processes. More specifically, understanding how these software tools are related to process of publication or consumption of LD. In order to meet their goal, the authors conducted a Systematic Literature Review (SLR) to identify the studies on the use of software tools in these processes. The SLR gathered 6473 studies, of which only 80 studies remained for final analysis (1.25% of the original sample). The highlights of the study are: (1) initial steps of the publication process are fairly supported by the software tools; (2) Non-RDF serialization is fairly supported in publication and consumptions process by the software tools; and (3) there are non-supported steps in consumption and publication processes by the tools.
Social Semantic Search
Authors: De Vocht Laurens , Softic Selver , Verborgh Ruben , Mannens Erik , Ebner Martin
Published: September 2017

When researchers formulate search queries to find relevant content on the Web, those queries typically consist of keywords that can only be matched in the content or its metadata. The Web of Data extends this functionality by bringing structure and giving well-defined meaning to the content and it enables humans and machines to work together using controlled vocabularies. Due the high degree of mismatches between the structure of the content and the vocabularies in different sources, searching over multiple heterogeneous repositories of structured data is considered challenging. Therefore, the authors present a semantic search engine for researchers facilitating search in research related Linked Data. To facilitate high-precision interactive search, they annotated and interlinked structured research data with ontologies from various repositories in an effective semantic model. Furthermore, the authors' system is adaptive as researchers can synchronize using new social media accounts and efficiently explore new datasets.
An Adapted Ant-Inspired Algorithm for Enhancing Web Service Composition
Authors: Dahan Fadl , El Hindi Khalil , Ghoneim Ahmed
Published: September 2017

Web Service Composition (WSC) provides a flexible framework for integrating independent web services to satisfy complex user requirements. WSC aims to choose the best web service from a set of candidates. The candidates have the same functionality and different non-functional criteria such as Quality of Service (QoS). In this work, the authors propose an ant-inspired algorithm for such problem. They named it Flying Ant Colony Optimization (FACO). Flying ants inject pheromone not only on the nodes on their paths but also on neighboring nodes increasing their chances of being explored in future iterations. The amount of pheromone deposited on these neighboring nodes is inversely proportional to the distance between them and the nodes on the path. The authors believe that by depositing pheromone on neighboring nodes, FACO may consider a more diverse population of solutions, which may avoid stagnation. The empirical experiments show that FACO outperform Ant Colony Optimization (ACO) for the WSC problem, in terms of the quality of solutions but it requires slightly more execution time.
Key Planning Factors for Deploying Ubiquitous Wi-Fi Networks in Hotels
Authors: Collins Galen R.
Published: September 2017

The Internet has changed the way in which people work and live. Many when traveling expect to be Internet-connected at all times without being tied down to physical wires, just as in their offices and homes. Wireless Fidelity (Wi-Fi) enables hotel guests with wireless-capable computers and devices to easily access high speed broadband networks within the coverage area. According to J.D. Power and Associates 2016 North America Hotel Guest Satisfaction Index Study, the most important amenity noted by guests was free Wi-Fi. Wi-Fi, initially deployed in public spaces, is now an expected room amenity. Providing reliable and robust Wi-Fi coverage throughout a hotel requires careful implementation planning for technical as well as business-related factors. This article identifies and discusses key Wi-Fi planning factors and their implications for wireless network architecture decisions in hotel environments.
The Effect of Room Service, Comfort, and Reservation Process on The Performance Dimension Evaluation
Authors: Anggraeni Adilla , Thorina Meyliza
Published: September 2017

As Indonesian hospitality market is growing, Indonesian customer preferences need to be understood more deeply by hotels to stay competitive. This research aims to examine the relationship between room service, room comfort, and reservation process factors to the performance of in-room dining, front office service, room amenities, hotel access and safety. Survey method was employed in this study, consisting of offline surveys distributed to the individuals who have stayed in one of the prominent hotels in Jakarta. The results indicated that room service does have a direct linear relationship on the performance of in-room dining, but room service does not have a direct linear relationship to the room amenities and hotel access and safety. Room comfort was shown to have a direct linear effect on the performance of in-room dining, room amenities, hotel access and safety. On the other hand, reservation process does have a direct linear effect on the performance of front office service as well as to the room amenities and hotel access and safety.
Using XXY Table to Construct a Verticality Calibrator and its Error Analysis
Authors: Lin Jui Chang , Lin Cheng Jen
Published: September 2017

In this work, according to the characteristics of analytes, using XXY table and angular displacement tables to construct an automatic verticality measurement and correction system for three axes. For the purpose of measuring and correcting the spatial verticality of analytes in three axial directions, in this study, using a XXY table and angular displacement tables to set up a simulate carrier, these tables are driven by a four axes motion controller to adjust their posture, and then utilizing five laser displacement meters and self-developed signal processing program to carry out the measurement work. The system sets five laser displacement sensors in the surroundings of analytes respectively, and using the measured data by laser displacement sensors to calculate the yaw, pitch and roll angles of the analytes. Finally, by the four axes motion controller to adjust the motion of these tables, let laser light perpendicular to the surface of analytes as far as possible to achieve the goal of this system. After the experimental verification, the average error is not more than 0.0417 degrees.
Investigation of Delta Robot 3D Printer for a Good Quality of Printing
Authors: Hsieh Cheng Tiao
Published: September 2017

Within this couple of years, a group of skilled people called “Maker” are interested in building everything by themselves. They attempt to develop a small manufacturing environment where allows people to execute a low cost fabrication task. In order to achieve this goal, they utilized flexible and smart manufacturing machines like 3D printers, laser cutter and small CNC. Especially 3D printer, its excellent performances had grasped many government administrators’ attention and developing 3D printing industry has become an important policy of many countries. Some of 3D printing patents have been expired within recent years. This event makes opens sources of 3D printers grow very fast. The Kossel Mini, Rostock and Prusa i3 are the typical examples. All of development kits of the above printers can be freely obtained from the Internet. This event makes a low cost fabrication become possible. However, the quality of their printed parts is dependent on a series of calibrations. The calibrations include defining the dimensions of hard frame of the printer, configuring firmware and setting building parameters of software. In order to let users to go through entire calibrating process, this paper proposed a standard procedure to calibrate Kossel Mini as well as make it print a good quality part.
Principle and Practice of the Measurement for Hourglass Worms and Hobs
Authors: Yu Bo , Shi Zhao Yao , Ye Yong , Yan Lu , Fu Ying , Zhang Lin Tao , Tang Jie
Published: September 2017

Compared with cylindrical worm gears, hourglass worm gears have better transmission performance. The measurement of the hourglass worms and the hobs is a critical issue to restrict the application of the hourglass worm gear transmission. To solve this problem, an hourglass worm and hob measuring principle and a measuring machine which achieves the inspection of each deviation are proposed. In this paper, the measuring principle is explained. The models of the deviations based on the cylindrical-coordinate system are determined. The machine controls the movement of the probe in accordance with the path created by the models. By checking the geometric deviations, including the helix deviation and the axial tooth profile deviation of the worm, and the cutting edge helix deviation and the cutting edge tooth profile deviation of the hob, the principle is proved to be feasible.
Calibration of Measuring Systems for the Expert Evaluation of Color Characteristics
Authors: Palchikova Irina G. , Smirnov Evgenii S. , Aleynikov Alexander F. , Chugui Yuri V.
Published: September 2017

Results of the development of the portable mobile color analyzer for sample surfaces using a digital camera are presented. The special program computes and analyzes the color characteristics of samples. The dominant wavelength and the saturation for each pixel as well as for the selected fragment of the digital image are calculated using the spectrum locus. To get the perfect linear color reproduction, the correction factors are introduced. Using the reference color atlas we define factors and carry out the calibration of analyzer′s measuring system by them. The special corrective procedure for the algorithm of the dominant wavelength calculation which enhances the accuracy for spectral colors up to ± 2.5 nm is elaborated. We tested the analyzer in experiments with meat samples produced at the poultry plants. The dominant wavelength could be used for recognizing meat quality characteristics. Experimental results demonstrated the significant differences in data for meat samples of different plants, and they indicated the real storage time of meat.
Accurate 3-D Surface Profilometry Using Novel Boundary Edge Detection on Digital Image Correlation
Authors: Chen Liang Chia , Liang Ching Wen , Tseng Huan Yu , Lin Shyh Tsong
Published: September 2017

A novel 3-D edge detection methodology is developed to resolve the edge ambiguity problem encountered in 3-D optical surface profilometry employing digital image correlation (DIC). DIC has been surged as a full-field measurement technique for in-plane and out-of-plane dynamic mechanical structure analyses. However, up to date, one of the key issues in DIC is still remained in boundary edge detection since a surface edge is not detectable between two discrete neighboring height jumps due to optical diffraction. Generally, it is common to observe undesirable noisy measured data along surface edges in traditional DIC-based surface 3-D profilometry. To resolve this, a novel random speckle images processing method is established by proposing a new algorithm by employing the multiple symmetric partial template model to determine best edge location with accurate height reconstruction. A theoretical simulation on a pre-calibrated circle target was performed to verify the feasibility of the methodology. Some experiments on real industrial objects having various surface reflective characteristics were implemented to verify its capability on accurate detection of industrial objects having discrete surface edges. From its preliminary evaluation on measurement accuracy, it is found that the maximum measured error on critical dimension can be controlled within less than 6.0% of the overall measuring range while one standard deviation can be kept within less than 1.2%.
Design of a Novel Compound Eye System
Authors: Li Li Hua , Chan C.Y. , Lee W.B.
Published: September 2017

Much progress has been made in the field of digital imaging technology with the widespread use of CMOS and CCD devices and the high computing power of IC chips. However, there still are many technological problems to overcome to achieve lightweight and affordable high density 3D lossless imaging for both industrial and scientific applications. This paper will focus on the latest development of freeform optical technology and powerful image analysis techniques to develop a compound eye camera system so as to extract the 3D relative position coordinates of the sub-object in the field of view, and to compensate the shadow effect in the images caused by the non-uniform illumination to obtain high quality lossless images. Such a novel compound eye system will find applications in delivering 3D image of digital camera, increasing capability of scientific profiling measuring instrument, and lowering cost and enhancing resolution of wide-field, video-rate, gigapixel cameras such as the AWARE designed by Duke University.The main objective of this paper is to design a novel compound eye system from high definition 3D lossless digital imaging technology to achieve the realistic three-dimensional positional information of the object in both near and far fields. In the imaging process, the ultimate imaging quality is affected and limited by the resolution of the detector, the field of view, wavefront aberration, resolution of the optical imaging system and the ambient light.The novel compound eye imaging system includes two modules: one is the optical imaging module with compound eye optical elements with other secondary optical lenses, while the other one is the image analysis module. By combining the above optical hardware with the image analysis software, the relative position information of the sub-objects in the picture and the lighting condition of the environment can be deduced accurately.
Digital Measurement and Control Technology of Grey Predictor-Based Inverse Hyperbolic Sliding Function for Solar PV Inverters
Authors: Chang En Chih , Wu Rong Ching , Chen Guan Yu , Wang Pei Shan , Liao Kuo Yuan
Published: September 2017

This paper develops a digital measurement and control technology of grey predictor-based inverse hyperbolic sliding function for solar PV inverters. The advantage of inverse hyperbolic sliding function (IHSF) is very low sensitivity to system uncertainties. However, when a large parameter variation or a sudden external load interference is applied, the steady-state errors still occur in the IHSF controlled solar PV inverter and incur high total harmonic distortion (THD), even deteriorate control accuracy. To eliminate steady-state errors, a grey predictor is used for the prediction of voltage THD. Once a high voltage THD of the solar PV inverter output is detected and then measured by grey predictor, the tracking error of the IHSF controlled system will gradually decrease to zero, thus achieving zero steady-state errors. With the proposed measurement and control technology, a digital closed-loop solar PV inverter system will yield high-quality AC output voltage with low THD and fast dynamic response even under highly nonlinear loading. Experimental results for the solar PV inverter are performed in support of the proposed technology.
Brain Activity Monitoring System Based on EEG-NIRS Measurement System
Authors: Tang Ya Wen , Lin Yue Der
Published: September 2017

Recently, near infrared spectroscopy (NIRS) is widely applied on brain activation energy monitoring and adopted in clinical experiments. The advantages of NIRS are its non-invasive measurement and lower electrical disturbances. To verify the covariance and correlation of electroencephalography (EEG) and NIRS, an EEG-NIRS measurement system is implemented for data collection. The EEG and NIRS signals are recorded by common EEG electrodes and specific wavelength optical sensors. The EEG and NIRS sensors are placed with staggered placement to keep the same space resolution. EEG signal is processed with an instrument amplify, a band-pass filter circuit and variable gain amplifier, sequentially. The red light and near infrared light generated by LEDs are projected onto the tissues. Base on the blood oxygen-level dependence, the reflected photons can transfer the information of brain oxygen concentration. The NIRS signal acquired by two optical sensors is converted to voltage and filtered by a band-pass filter. In this measurement system, time-division multiplexing technique is applied on NIRS data collection to get the concentration of oxygenated hemoglobin and deoxy-hemoglobin. So, light sources and optical detectors are controlled by a signal processor. The post process data is digitalized and transferred to personal computer for brain activity estimation. The brain activity is extracted from the EEG and NIRS signal, individually. In this experiment, the EEG and NIRS signals are checked and analyzed. Although two kinds of brain activation indexes are resulted by different signal transfer path, the consistence response approves that the NIRS can be considered to monitor the brain activity. The easily setup of NIRS measurement can bring us more freedom of brain information extraction.
Surface Deformation Measurement Using Point Set Registration
Authors: Wu Chia Hsiang , Jheng Siao Wei
Published: September 2017

Measurement of surface deformation is a key component for mapping intraoperative and preoperative image data in image-guided surgery. In this study, we segment CT-scanned images and then use a coherent point drift algorithm for the estimation of surface deformation. To extract surface points, the segmentation is based on the intensity of the image data. The registration of two point sets is considered as a probability density estimation problem in an expectation-maximization framework. Experimental results show that surface deformation between two point sets can be obtained based on the obtained geometric transformation.
Efficient Evaluation Method of Cell’s Viability Using Dielectrophoresis
Authors: Komai Ryosuke , Aritoshi Keisyu , Taguchi Kozo
Published: September 2017

We used Dielectrophoresis (DEP) to discover healthy cells and estimate the cells activity and viability. In the first experiment, we mixed dead cells with methylene blue solution. We applied voltage of 4V, frequency of 10 kHz and 15 MHz to the electrode [1], and observed the movement of the cells. This experiment proved that DEP could also be used to judge cell’s viability.
In the next experiment, we used viable cells and raised water temperature rapidly to apply damage. Temperature of water was fixed at 30 degrees, 40 degrees, 50degrees, 60degrees, and 70 degrees. And we observed the cells movement while changing the frequency. We mixed methylene blue solution with the sample to confirm whether the yeast cells were dead or alive when water temperature was from 50 degrees to 70 degrees. These experiments proved that it was possible to measure the activity of cells by changing the DEP frequency.
Study on Temperature Rise Modeling of Main Motor of Hot Rolling Mill Based on Support Vector Machines
Authors: Gao Yi , Cai Ping , Chen Feng , Qin Ru
Published: September 2017

Along with the ongoing process of the adjustment of industrial structure in China, overcapacity of the traditional heavy industry has become an issue of deep concern, and the direct consequence of overcapacity is energy waste. Tandem rolling mill is the typical equipment whose designed capacity is greater that the current real need. In many steel mills the practical work load of tandem rolling mill is far below the rated, while its forced-air cooling motor still runs at full capacity regardless of any change of heat load or season, leading to energy waste. Adjusting drive frequency of the air cooling motor according to its heat load is a practical and feasible measure for energy saving. As one of the important aspects of variable speed control of the air-cooling motor, to establish a precise temperature rise model for the object is critical.
This research focuses on the temperature rise modeling of the main motor of hot rolling mill. The temperature rise mechanism of the main motor is first analyzed, and then the support vector machines regression algorithm is used for parameter identification of the model. To ensure the security and reliability of the production line, different penalty coefficients are adopted for positive error and negative error.
Long term workshop data are collected and used for comparison with the predicted data. Comparison results demonstrate the feasibility of the established model.
Theory and Experiment Study on Laser Self-Mixing Interference with Multiway Feedback External Cavity
Authors: Zhang Yu , Huan Hai , Xu Dong Dong , Huang Ling Xiao , Lu Song
Published: September 2017

The self-mixing interference (SMI) effect with multiway feedback is analyzed in this paper. The basic theory of SMI with multiway feedback external cavity (MFEC) can be derived from the theory of interference as well as the theory of laser self-mixing interference (LSMI). Based on the external cavity structure with MFEC, a SMI model with two feedback external cavity structure is proposed. The expressions of the phase and output power in the MFEC are deduced and some simulation analyses are made. It is found that the output signal of the SMI system with two external cavity is sinusoidal or sawtooth waves, which is similar to the signal of SMI with a low frequency sinusoidal phase modulation. The density of interference signal fringes is uneven in one period and the shape of the interference wave is determined by the intensity of the external feedback. Furthermore, a SMI with two feedback external cavity experiment system is considered, and the experiment verifies the simulations.
IC Test Probe Measurement System
Authors: Liu Hsiao Wei , Chen Chin Sheng
Published: September 2017

Integrated-Circuit (IC) test probes have been designed variously and manufactured flexibly cause of diverse IC packaged forms. To successfully test the functions of the packaged IC, the packaged industry should carefully select a suitable probe type based on the size or pitch of the ball and the lead of the packaged IC. One plunger of the probe is used to be connected with the packaged IC; the other plunger is connected to the testing devices. A probe basically is composite of a barrel and two plungers whose head might be the crown or the pierced type. The main diameter of the probe’s barrel varies from 0.2 millimeter to 0.6 millimeter; the total length of the probe could be from 1 millimeter to 7 millimeter. The probes ought to be detected before implanting them into the housing socket. However, the presenting probe measure method, eye checking by human beings, cannot fulfill the diverse types of probes because the size of IC becomes more delicate and smaller. This paper aims to develop an intelligent system that can detect and recognize more than ten items of a probe. The experimental results demonstrate that the proposed system can effectively measure the different probes.
Development and Evaluation of a Combined Three-Component Micro Force Sensor with a Lower Uncertainty
Authors: Qin Ting Hai , Jin Xin , Zhang Zhi Jing , Zhang Bing Yin
Published: September 2017

The measurement of three-component micro cutting force is perceived as a core requirement for the field of micro machining. However, the existing three-component force sensors cannot meet the requirement because of its excessive range, low accuracy, complex structure, serious coupling and impure extraction of the micro force to be measured. In this paper, a three-component micro force sensor is proposed to measure the three-component micro force simultaneously. The innovative design of combined composition, series connection, coordinate relationship and coil structure make it stand out from the crowd. Mechanical calculation are conducted to solve the stress and strain parameters of designed sensor, which is in turn, be verified by finite element simulation. Finally, the characteristic experiment and uncertainty evaluation of the designed sensor is performed. The results reveal that the relative uncertainty of the three-component force sensor is less than ±0.5‰. Thus, it is thought that the designed sensor can be accurately used in industry.
Tip-Tilt Tests by Using Eddy Current Measuring Sensors
Authors: Kim Young Soo , Kim Ji Hun , Song Je Heon , Lee Chan Hee , Lee Won Gi , Kim Ho Sang , Lee Kyoung Don , Cho Myung , Ahn Hyo Sung , Park Won Hyun , Yang Ho Soon
Published: September 2017

Fast-steering Secondary Mirror (FSM) will be installed to the Giant Magellan Telescope (GMT) as a first generation secondary mirror. The FSM implements a tip-tilt mechanism which compensates image degradations caused by wind turbulence and structure jitter. A prototype segment of the FSM has been developed, which comprised of a dummy mirror, a mirror cell, axial and lateral supports, vacuum devices, etc. Several test-bed frames have been developed to hang the segment and to test tip-tilt functionalities. They have been designed, manufactured, assembled, and verified successfully step by step. Tip-tilt measurements were performed mainly by displacement measuring sensors which detect eddy currents precisely. The results proved that the prototype segment worked successfully, by complying the requirements of the FSM for the tip-tilt actuations.
Wireless Input Technology Based on MEMS Inertial Measurement Unit - A Survey
Authors: Fu Zhen Xian , Zhang Guang Ying , Lin Yu Rong , Liu Yang
Published: September 2017

Rapid progress in Micro-Electromechanical System (MEMS) technique is making inertial sensors increasingly miniaturized, enabling it to be widely applied in people’s everyday life. Recent years, research and development of wireless input device based on MEMS inertial measurement unit (IMU) is receiving more and more attention. In this paper, a survey is made of the recent research on inertial pens based on MEMS-IMU. First, the advantage of IMU-based input is discussed, with comparison with other types of input systems. Then, based on the operation of an inertial pen, which can be roughly divided into four stages: motion sensing, error containment, feature extraction and recognition, various approaches employed to address the challenges facing each stage are introduced. Finally, while discussing the future prospect of the IMU-based input systems, it is suggested that the methods of autonomous and portable calibration of inertial sensor errors be further explored. The low-cost feature of an inertial pen makes it desirable that its calibration be carried out independently, rapidly, and portably. Meanwhile, some unique features of the operational environment of an inertial pen make it possible to simplify its error propagation model and expedite its calibration, making the technique more practically viable.
A Multi-Segments Stitching Method for Profile Measurement of Large Scale Aspheric Surface within Submicrometer Accuracy
Authors: Ye Shi Wei , Yang Ping , Wang Zhen Zhong , Zhang Yan Ting , Peng Yun Feng
Published: September 2017

A multi-segments stitching method is proposed to obtain two-dimensional profile of large scale aspheric components during grinding process. We firstly analyze the corresponding relation between surface features of aspherics and measurement range of profilometer. According to multi-body system theory and slope difference, a mathematical model of multi-segments stitching method is constructed. Further, the multi-segments stitching errors based on 400 mm aspheric profile are simulated with different translation amounts, rotation angles, translation errors as well as rotation errors. The simulation results indicate that the translation error is the key factor for measuring accuracy of the multi-segments stitching method. In addition, the standard deviations of multi-segments stitching errors are between 0.2 μm and 0.4 μm as the four factors are set to the proper values. To verify the simulation analysis results, an experimental setup, including Talysurf PGI 1240 and fixture, is applied to detect a 150 mm profile line on the aspheric surface. The experiment results show that the standard deviations of multi-segments stitching errors are almost within 1 μm when the rotation angle is under 7° and the translation amount is under 11 mm. The multi-segments stitching method can employ a small-range profilometer to achieve measurement of large scale aspheric surfaces with submicrometer accuracy.
Electron-Beam Welding - Structural-Phase State and Microhardnes in the Weld Zone in a Submicrocrystalline Titanium Alloy Grade2
Authors: Klimenov Vasilii A. , Klopotov Anatolii A. , Abzaev Yu.A. , Kurgan K.A. , Vlasov Yu.A.
Published: September 2017

The paper presents the results of the X-ray diffraction analysis of structural-phase states in the weld zone of a titanium alloy Grade2 in micro-and submicrocrystalline states. It is established that the structural-phase state in the weld zone and in the heat-affected zone depends on the state of samples of the alloy Grade2 before welding. It is shown that formation process of metastable phases ω-Ti and α′′-Ti occurs in the submicrocrystalline state in the alloy Grade2 in the weld zone and in the heat-affected zone. Investigations of the features of the microhardness distribution in the weld zone in alloys Grade2 in micro-and submicrocrystalline states are carried out. Different character of microhardness distributions in the weld zone in the samples depending on the structural-phase state of welded plates made of alloy Grade2 is determined.
Integral Strain Gauges Application for Gearing Reliability Estimation
Authors: Syzrantsev Vladimir , Syzrantseva Ksenia
Published: September 2017

The paper describes the basic principles and some results of obtaining data by means of integral strain gauges about load-carrying capacity and durability of gear transmissions for new specimens of machines when running in the transmissions in structure of gear box on the stand, or in short-term trials of machines in field conditions.
Development of Relay Control Systems of Power and Temperature Mode of Induction Crucible Furnaces with Use of Physical Modeling
Authors: Kuvaldin A.B. , Fedin Maxim A. , Kuleshov A.O. , Zhmurko I.Y.
Published: September 2017

The physical models of the induction crucible furnaces with nonconducting crucible and conducting crucible were developed. Experimental study of the parameters of an induction crucible furnace for melting of ferromagnetic lumpy charge in ferromagnetic nonconducting crucible was made. Experimental study of the parameters of the furnace for melting copper and magnesium in conducting crucible was made. Three-position control system of active power of induction crucible furnace for melting of ferromagnetic lumpy charge and two-position control system for temperature regime of induction crucible furnaces with conductive crucible were developed.
Software Application of Material Structure Prediction
Authors: Karyakin Y.E. , Karyakin I.Y. , Karyakina Svetlana V.
Published: September 2017

The developed software application allows the user to model phase transformations under isothermal conditions for a specified steel grade at arbitrary tempering temperature. Architecture of the software application using scheme of the chart of distributed computation of simulation model kinematic parameters for reducing time expenditures during computer experiments. The recognition algorithm of raster images on the isothermal and thermokinetic diagrams has been proposed. The imaging algorithm of the material structure after heat treatment have been developed.
Flexural Behavior of Steel Fiber Reinforced Concrete Shield Tunnel Segment
Authors: Zhang Fa Sheng , Shi Yun Xing , Shi Jing Bin , Ni Kun , Zhang Yan Gang , Li Xiao Jie
Published: September 2017

In order to study the flexural behavior of steel fiber reinforced concrete (SFRC) shield tunnel segment, two full scale shield tunnel segments and twelve reduced scale shield tunnel segments were made and tested. Based on the experiment study, the effectiveness of reduced scale segment was analyzed. Meanwhile, based on the fail mode, load-deflection curves and crack width, the part substitution of steel reinforcement by steel fibers was studied. Test results showed that the reduced scale model can reflect the flexural behavior of full scales tunnel segment and 45kg/m3 steel fibers of 3D type can replace 17% longitudinal reinforcement and 70% stirrups.
Evaluation of Wear and Corrosion Resistances of Oxide Coatings Formed on Magnesium Alloys by Micro Arc Oxidation
Authors: Tekin Mustafa , Taslicay Cengizhan , Muhaffel Faiz , Çimenoğlu H.
Published: September 2017

In the present study, wear and corrosion resistances of magnesium alloys were analyzed after coated by micro arc oxidation (MAO) process for potential protection of gear component, which is the most wearing part of a conventional bicycle. Two of the most common magnesium alloys (AZ31 and AZ91) were used in the study and they were oxidized in three different electrolytes (aluminate-, silicate-and phosphate-based). Scanning electron microscopy (SEM) was utilized in order to analyze the coating morphology and wear tracks obtained during wear tests. Energy dispersive X-ray spectroscopy (EDS) analyses were implemented to determine the elemental composition of the coatings. Wear and corrosion tests were applied to compare the performances of the coatings. Experimental results showed that wear and corrosion resistances of the samples generally increased after coated by MAO process and the best protection against wear and corrosion related failures, was achieved by utilizing silicate-based electrolyte for MAO process of magnesium alloys under selected process parameters.